The text is short and concentrates on a narrow technical defect; the main concepts in the instrument are these.

Applicability: The AD declares “Applicability: All seat belts.” This is broad on its face and means the instruction is not limited by aircraft type, model, or role in the AD text; it uses seat-belt-level scope rather than aircraft-level carve-outs. The AD also specifies that the inspection covers seat belts “supplied under an airframe manufacturer’s part number,” which prevents an avoidance argument where belts were supplied as part of an airframe kit.

Identification criterion: The AD uses a marking-based identification rule. It instructs operators to “Inspect all seat belts to determine if they are marked as having been manufactured by the EON Corporation under ‘TSO-C22’.” The trigger is the presence of that marking. This links the mandated action to a visible manufacturing/TSO marking, rather than to a serial number or production batch.

Defect element: The AD singles out a particular buckle variant, the “E6000 buckle assembly.” A Note describes its physical configuration: “a front cover plate which is pivoted at one end and is pulled at the other end through an arc to release the latch from the buckle,” and notes that the assemblies “can be identified by the type of catch they use.” The AD refers to “Figure 1” for the catch configuration. The defect described is mechanical separation under load, either by pull-apart under expected loads or by manipulation of the latch.

Remedial action: The mandated remedial action is removal and replacement. The directive requires that, where an E6000 buckle is fitted to a seat belt marked as EON/TSO-C22, the “seat belt assembly” is removed and replaced “with another item approved in accordance with regulation 21.305 of CASR.” The AD does not specify a particular replacement make or model; it restricts replacements to items satisfying the referenced regulatory approval criterion.

Disposition of removed parts: The AD requires that “The seat belts removed in compliance with this AD are to be destroyed or have the ‘TSO-C22’ markings removed or totally obliterated.” The intent is to remove those belts from potential reuse in the aviation supply chain and to prevent misidentification and reinstallation.

Spare parts prohibition: The AD contains an affirmative prohibition: “No E6000 buckle may be installed as a spare part after the effective date.” That prohibits fitting E6000 buckles going forward, including installation from inventory.

Temporal and cross-reference concepts: The AD contains an unusual mix of dates and cross-references. It states that “Compliance: Prior to the issue of a Certificate of Airworthiness after 4 June 1987,” and that “Inspection in accordance with AD/RES/20 satisfies the requirements of this AD.” It also states “This AD commences on 24 April 2017.” The AD is labelled as an amendment (Amdt 1) to AD/RES/20 and notes that the amendment corrects a superseded regulation reference. The document also refers to “FAA AD 87-04-19,” linking the action to an earlier FAA directive.

Authority and issuer: The AD is issued under the CASA delegate’s signature, Pieter van Dijk, on 19 April 2017. The header shows the file references AD/RES/20 Amdt 1 and 8/2017. The issuing authority is thus the Civil Aviation Safety Authority by delegate instrument. No separate enforcement or penalty clauses are included in the AD text itself.

Risk framing: The AD frames the safety risk in terms of restraint failure under flight or crash loads, specifically that assemblies “pulled apart under load” or assemblies that could be manipulated to pull apart “could result in lack of restraint during either flight or crash loads.” That identifies both mechanical overstress failure and latch-manipulation vulnerability as the proximate hazards the AD intends to remove.

The instrument’s applicability language and specific requirements identify a set of stakeholders who will bear costs or exercise decisions.

Aircraft owners and operators: The AD applies to “All seat belts,” which directly implicates aircraft owners and operators who are responsible for maintaining airworthiness and for ensuring aircraft hold a Certificate of Airworthiness. The compliance line ties the action to COA issuance: “Prior to the issue of a Certificate of Airworthiness after 4 June 1987,” so the entity that requests and receives the COA must ensure compliance in relation to that regulatory milestone. Operators will need to resource inspections, replacements and record-keeping for the belts affected.

Maintenance organisations and certifying staff: The AD requires physical inspection and removal/replacement of seat belt assemblies. Licensed maintenance organisations and certifying engineers or fitters will therefore perform the work. They must be able to identify TSO-C22 markings, recognise E6000 buckles (the AD provides a Note describing the buckle mechanism and catch configuration), and install replacement parts approved “in accordance with regulation 21.305 of CASR.” Certifying staff will be involved in endorsing compliance for COA issuance and continuing airworthiness records.

Spare parts suppliers and stores: The AD declares “No E6000 buckle may be installed as a spare part after the effective date.” That affects parts suppliers, spares managers and stores who hold E6000 buckles in inventory. They must ensure such items are not used and must either remove them from stock, quarantine and destroy, or otherwise prevent installation. The AD further requires that removed seat belts be destroyed or have the “TSO-C22” markings removed or obliterated, which affects the disposal process for removed items in supply chains.

Airframe manufacturers and OEMs: The AD explicitly requires inspection of “all seat belts” including those “supplied under an airframe manufacturer’s part number.” This draws in airframe manufacturers to the extent their kits include seat belts; their supply chain records and BOMs will be relevant to identify affected components, and they may face queries where belts they supplied are found to have E6000 buckles.

Regulators and certifying authorities: The AD was issued by a CASA delegate, so CASA as the regulator is the issuing body. The AD cross-references regulation 21.305 of CASR for approval criteria of replacement items, which brings a regulatory approval process into play. Certifying authorities issuing Certificates of Airworthiness will be operationally engaged to ensure that COAs are not issued unless this AD has been complied with, consistent with the AD’s compliance clause.

Passengers and broader public: Passengers are an indirect affected class. The AD’s safety objective is to reduce risk of restraint failure; passengers will be affected only insofar as the directive changes the equipment used to restrain them and reduces the presence in-service of E6000-equipped belts.

Who pays: The AD imposes inspection, replacement and disposal costs on the operator/owner and on maintenance organisations that perform such work. Spare parts managers also incur inventory-handling costs. The AD text does not provide financial assistance or compensation; the cost incidence therefore defaults to the private actors who own, maintain and certify aircraft and parts.

The AD sets out specific duties and a few implied rights by operation of requirements; each duty is in the text and should be read as mandatory for affected parties.

Mandatory inspection: Duty to “Inspect all seat belts to determine if they are marked as having been manufactured by the EON Corporation under ‘TSO-C22’.” This is the initial screening duty, and it expressly includes seat belts “supplied under an airframe manufacturer’s part number.” The inspection duty therefore extends to installed belts, belts that are original equipment, and belts provided within airframe kits.

Duty to remove and replace: Where the inspection reveals an EON/TSO-C22-marked belt fitted with an E6000 buckle, the AD commands: “If an E6000 buckle is fitted, remove the seat belt assembly and replace with another item approved in accordance with regulation 21.305 of CASR.” The duty attaches to the entire seat belt assembly and requires replacement with an item that meets the regulatory approval standard referenced.

Disposal/marking duty for removed parts: The AD prescribes the disposition of removed assemblies: “The seat belts removed in compliance with this AD are to be destroyed or have the ‘TSO-C22’ markings removed or totally obliterated.” The duty is to ensure removed parts cannot be returned to service or misidentified as airworthy EON TSO-C22 products.

Prohibition on spare installation: The AD stipulates “No E6000 buckle may be installed as a spare part after the effective date.” That is a continuing prohibition that applies to future installations from spare stock, not just to currently installed parts.

Replacement approval standard: There is a duty implicit in the replacement requirement: replacements must be “approved in accordance with regulation 21.305 of CASR.” The AD does not list approved replacement models; the duty is to ensure the replacement has whatever type of approval is required under reg 21.305. That places on the operator or maintainer the obligation to check and document the approval status of the replacement item.

Timing obligations: The compliance clause reads “Prior to the issue of a Certificate of Airworthiness after 4 June 1987.” That creates a temporal benchmark. The AD further states that “Inspection in accordance with AD/RES/20 satisfies the requirements of this AD.” Those clauses allocate timing responsibility in relation to COA issuance and imply that earlier inspections done under AD/RES/20 are acceptable.

Rights and compliance equivalence: The AD implicitly recognises a right to rely on prior compliance under AD/RES/20 for the inspection element, because it states inspections carried out under AD/RES/20 “satisfies the requirements of this AD.” That gives a compliance equivalence right to persons who previously complied with the earlier AD.

Record and certification duties, implied: Although the AD does not specify record-keeping, the obligations to inspect, replace and ensure replacement approvals govern COA issuance and therefore intersect with usual airworthiness record and certification duties under regulatory practice. The absence of an explicit record-keeping clause in the text does not relieve certifying staff from their standard duties under broader aviation regulation, but the AD itself does not specify audit or documentation steps.

Absence of penalties or enforcement text: The AD contains no provisions specifying penalties, suspension, or processes for non-compliance within its own text. It does, however, impose mandatory remedial measures; enforcing those measures would rely on the regulator’s standard enforcement powers outside the text of the AD. The AD thus sets duties but does not itself define enforcement mechanisms or sanctions.

Operational discretion: The AD specifies what must be done, not how detailed steps are to be sequenced beyond the inspection, removal/replacement and disposal/marking obligations. The practical execution, such as scheduling, recordation, or repair station procedures, is left to operators, certificated maintenance organisations and the certifying authority to manage within normal regulatory processes.

The AD text does not include express penalty clauses, civil sanction amounts, or a prescribed enforcement procedure. The instrument sets mandatory corrective steps but does not itself describe the legal consequences of failing to comply. The issuing signature is by a CASA delegate, and the AD is a regulatory instrument of the Civil Aviation Safety Authority; enforcement and penalties for breach of airworthiness directives typically flow from the regulator’s statutory powers, but the text here does not recite those powers or any specific sanctions.

Consequences implied by the text: Because the AD ties compliance to Certificate of Airworthiness issuance , “Prior to the issue of a Certificate of Airworthiness after 4 June 1987” , one practical enforcement lever is COA refusal or delay until compliance is demonstrated. Certifying authorities and persons responsible for issuing a COA would thus have a role in ensuring the AD’s requirements are satisfied before a COA is issued after the stated date. The AD also indicates that prior inspection in accordance with AD/RES/20 satisfies this AD’s inspection requirement, which provides an administrative compliance pathway for those who earlier complied.

Enforcement mechanisms not specified: The AD does not detail audit, reporting, or inspection schedules to verify compliance, nor does it set out notice, remedial order or penalty processes. The absence of procedural enforcement language in the AD means any formal enforcement action would be taken under the regulator’s broader statutory framework rather than under detailed provisions in the AD itself. The AD therefore imposes obligations that are binding by virtue of its status, but the text does not identify how CASA will monitor or enforce compliance.

Operational risk to operators: Practically, non-compliance exposed during a certification event, ramp inspection, or accident investigation could lead to administrative action or regulatory consequences under broader aviation laws, even though such consequences are not described here. The AD’s disposal requirements for removed parts , destruction or obliteration of TSO markings , create a physical audit trail if implemented properly; conversely, failure to destroy or obliterate could be discovered in supply chain audits.

Third-party liabilities and insurance: The AD text makes no reference to third-party liability, insurance implications, or indemnities. Any legal exposures arising from failure to comply with the AD would be governed by external law and contract, not by the AD’s provisions.

Reference to other instruments: The AD refers to FAA AD 87-04-19 and to regulation 21.305 of CASR. Those references do not alter the AD’s lack of internal penalty language, but they provide external normative anchors relevant to replacement approvals and to historical FAA action. Enforcement of the AD’s replacement criterion would therefore be operationalised through the approval process mandated by the referenced CASR regulation, though the AD does not itself provide enforcement mechanics.

In short, the AD mandates inspection, replacement and disposal actions without specifying internal penalty clauses. Enforcement responsibility and any sanctioning power must be inferred to reside with CASA and the usual regulatory apparatus; those mechanisms are not further described in the AD text.

The AD references and interacts, within its text, with two external legal/regulatory instruments and with standard aviation certification practice.

Reference to CASR regulation 21.305: The AD requires replacement parts to be “approved in accordance with regulation 21.305 of CASR.” That is an explicit cross-reference to the Civil Aviation Safety Regulations. The AD does not reproduce or paraphrase reg 21.305; it delegates the approval standard for replacement items to that regulation. Practically, this means that replacement seat belt assemblies must comply with whatever approval pathway and standards are set out in reg 21.305. Implementers must therefore consult reg 21.305 to determine acceptable replacement options and the documentary evidence required to demonstrate compliance.

Cross-reference to FAA AD 87-04-19: The AD notes “Note 2: FAA AD 87-04-19 refers.” That links the directive to an earlier FAA airworthiness directive that is likely the origin of the safety finding or a related action. The AD itself does not bind the FAA AD, nor does it reproduce its content, but it signals regulatory congruence with a historical FAA action for those who track cross-jurisdictional airworthiness history.

Interaction with AD/RES/20: The instrument is an amendment to AD/RES/20 (captioned “AD/RES/20 Amdt 1”) and expressly states “Inspection in accordance with AD/RES/20 satisfies the requirements of this AD.” That creates an equivalency relation, whereby persons who complied with the earlier AD need not re-do the inspection requirement. The amendment also states that it “corrects reference to a superseded regulation,” showing a direct document-level interaction with prior national regulation citations. The AD is therefore not standalone but is configured to slot into an existing AD framework.

Certificate of Airworthiness issuance processes: The AD conditions compliance on the issuance of a COA: “Prior to the issue of a Certificate of Airworthiness after 4 June 1987.” This operationally links the AD to the statutory processes for COA issuance. Certifying authorities issuing COAs must check compliance with this AD as part of airworthiness determinations for COAs issued after the specified date, unless inspection under AD/RES/20 has previously been done.

Absence of penalty provisions: The AD contains no internal enforcement or penalty clauses. Enforcement interaction with criminal, civil or administrative regimes is therefore not set out in the AD itself; any legal consequences of non-compliance will be governed by CASA’s general statutory enforcement powers outside the AD text.

Supply-chain and parts law: By requiring destruction or obliteration of TSO-C22 markings on removed seat belts, the AD interacts with legal and practical considerations in parts disposition, including waste handling, traceability requirements, and resale prevention. The AD does not provide an approved method for destruction or for retention of destroyed-part evidence; parties will need to apply standard regulatory and organisational procedures for scrapping or obliterating aviation hardware.

Regulatory hierarchy and authority: The AD is issued by a CASA delegate, which indicates administrative authority. The AD’s instructions are enforceable as direction under CASA’s regulatory remit, but the AD does not itself restate CASA’s enabling statute or enforcement powers. Users must treat this AD as a mandatory airworthiness directive whose obligations intersect with broader aviation regulation and certification requirements.

In sum, the AD cross-references reg 21.305 of CASR for replacement approvals, accepts prior compliance under AD/RES/20, and signals linkage to an FAA AD. The AD interfaces with COA issuance requirements but does not itself provide enforcement detail; enforcement would be effected through the regulator’s existing legal powers outside the AD text.

The instrument is styled as AD/RES/20 Amdt 1 and bears document references repeated in the header (AD/RES/20 Amdt 1; AD/RES/20 Amdt 1; Eon Corporation E6000 Buckle Assemblies; 8/2017). The text explicitly records that “This amendment corrects reference to a superseded regulation.” That is the declared purpose of the amendment; the AD therefore appears to be an update or technical correction to a prior AD rather than a wholly new safety directive.

Date and signature: The AD is dated 19 April 2017 and is signed by Pieter van Dijk, identified as “Delegate of the Civil Aviation Safety Authority.” The AD also states “This AD commences on 24 April 2017,” giving a formal commencement date shortly after the signature date. The header includes “8/2017,” which is likely an internal file or issue number for 2017.

Prior AD linkage: The text says “Inspection in accordance with AD/RES/20 satisfies the requirements of this AD.” That indicates that AD/RES/20 is the antecedent instrument and that this amendment (Amdt 1) is intended to amend or clarify AD/RES/20. The AD’s instruction that prior inspection under AD/RES/20 suffices preserves continuity with the earlier directive’s compliance actions.

Historical reference to 1987: The compliance clause contains a striking historical element: “Prior to the issue of a Certificate of Airworthiness after 4 June 1987.” That date predates the AD by decades. The AD also references “FAA AD 87-04-19,” an FAA directive from 1987. Taken together, the amendment appears to relate to an original regulatory action dating to about 1987, and Amdt 1 corrects or updates references within that long-standing directive. The AD text does not provide an explicit narrative of the original AD/RES/20 issuance date, but the inclusion of the 1987 COA benchmark and the FAA AD citation shows a lineage to that period.

Reason for amendment: The AD states the amendment “corrects reference to a superseded regulation.” The AD does not identify the exact superseded regulation or give a textual comparison between old and new references. The amendment therefore appears to be a technical correction to ensure that the AD's cross-references or regulatory citations are current and accurate.

Versioning: The document header repeats the amendment label and the subject name multiple times; it is marked “AD/RES/20 Amdt 1” and “Eon Corporation E6000 Buckle Assemblies” with the numeric stamp “8/2017.” Those items together indicate that the AD is the first amendment to AD/RES/20 issued in 2017. No further amendments or subsequent versions are recorded within the text supplied.

No other amendments recorded: The supplied text contains no later dates, rescissions, or further amendments beyond Amdt 1. No sunset provision is included. The AD’s commencement is 24 April 2017, and the compliance line references 4 June 1987 for COA issuance, but no further update history appears in the text.

Metadata and administrative record: The AD includes a small image with the signature block and the delegate’s name, which functions as the administrative sign-off on the amendment. No attachment or revision history beyond the textual note about correcting a superseded regulation is included.

In sum, AD/RES/20 Amdt 1 is an amendment that corrects a superseded regulatory reference, links back to an original 1987 FAA directive and to AD/RES/20, is dated and signed in April 2017, and contains no other recorded subsequent amendments in the supplied text.

The supplied AD text contains no litigation history. It does not reference any court decisions, judicial review, or dispute resolution related to this AD or to the underlying safety issue. The only external legal instrument cited is “FAA AD 87-04-19,” which is identified as a related FAA airworthiness directive, not as litigation.

Because the text is silent on any legal challenges or case law, there is no source-grounded material in the AD to summarise about judicial interpretation, compliance litigation, or precedent concerning AD/RES/20 or this amendment. Any matters concerning enforcement disputes, appeals to tribunals, judicial review of CASA actions, or contractual claims arising from compliance costs are outside the information provided in this instrument.

Users seeking litigation history would need to consult external legal databases, CASA records or court filings for matters involving AD/RES/20, Eon Corporation E6000 buckles, or related certification disputes. The AD itself does not allege or report on any litigation, nor does it make statutory references to procedures for appeals or objections to ADs. The lack of litigation content in the AD means that, as a matter of this source, there is no adjudicated interpretation or case law to cite.

Several practical and interpretive points in the AD give rise to implementation risk, ambiguity and practical traps for those who must comply.

Very broad applicability wording: The AD states “Applicability: All seat belts.” That is expansive. Operators might be tempted to narrow the field by aircraft category, serial ranges or installation records, but the AD’s plain wording is not limited. The AD also expressly includes “seat belts supplied under an airframe manufacturer’s part number,” which prevents a convenient exclusion of original equipment items from inspection obligations. Implementers should not assume applicability is limited to a subset without documented evidence to the contrary.

Marking-based identification may be ambiguous in practice: The AD makes the presence of “TSO-C22” marking and a manufacturer marking for EON Corporation the identification trigger. However, in service belts markings can become worn, painted over, or obscured. The AD’s disposal requirement to “remove or totally obliterate” the TSO-C22 marking on removed belts suggests an expectation that marking identification is critical to preventing recurrence. In practice, inspectors will need clear, auditable processes to confirm marking presence or absence and to document findings where markings are not legible.

Physical identification of E6000 buckles: The AD provides a Note describing the E6000 assembly (front cover plate pivoted at one end, pulled through an arc to release the latch). The AD also refers to “Figure 1” for the catch configuration. If Figure 1 is not available in the implementer’s copy of the AD, or is difficult to interpret, maintenance personnel may have to rely on the textual description alone. That introduces risk of misidentification and inconsistent application across maintenance organisations.

Temporal oddity and retroactivity confusion: The compliance clause “Prior to the issue of a Certificate of Airworthiness after 4 June 1987” appears to set a compliance benchmark decades in the past. Simultaneously, the AD “commences on 24 April 2017.” This juxtaposition can cause confusion about whether the directive requires retrospective action for COAs issued after 1987, or whether it is merely reaffirming an earlier obligation. The AD’s statement that “Inspection in accordance with AD/RES/20 satisfies the requirements of this AD” partially addresses this, but implementers should take care to document whether prior AD/RES/20 inspections were carried out, and to obtain regulator clarification if the COA-related timing is material to a particular aircraft.

Destruction or obliteration requirement: The AD mandates destroyed or fully obliterated markings on removed seat belts. That raises questions about acceptable methods of destruction, evidentiary proof that destruction occurred, environmental waste handling requirements, and record retention. The AD does not provide procedures or acceptable forms of evidence; operators will need to create compliant processes and maintain records to show removed parts have been disposed of in accordance with the AD.

Replacement approval documentation: Replacement parts must be “approved in accordance with regulation 21.305 of CASR.” The AD does not say how to evidence the approval. Maintenance organisations must ensure they have documentation that demonstrates the replacement parts meet the approval pathway under reg 21.305, and must store that evidence for certification and audit processes. Failing to maintain clear approval paperwork could lead to COA delays even when the physical equipment has been replaced.

Spare part stock management: The absolute prohibition on installing E6000 buckles as spares after the effective date requires parts managers to identify, segregate and either destroy or otherwise prevent use of existing E6000 spares. The AD does not say whether E6000 buckles already fitted but later removed must have buckles destroyed, though it does demand destruction or marking obliteration of removed seat belts. Parts managers should document inventory disposition decisions to avoid inadvertent future installations.

Interplay with earlier compliance: The statement that inspections under AD/RES/20 “satisfies the requirements” implies that operators who complied previously may consider themselves compliant, but they must be able to demonstrate the prior compliance. If records from AD/RES/20 compliance are incomplete, operators may find themselves required to re-inspect. That creates operational risk especially for older aircraft whose documentation may be incomplete.

No enforcement detail in the AD: The AD provides no explicit enforcement procedure or penalty schedule. That can be a gotcha when operators face regulator queries or inspections because the AD must be enforced using CASA’s general powers, and the process for proving compliance to an inspector or in a certification event depends on record quality rather than on a specified procedural pathway in the AD.

No recommended replacements listed: The AD does not provide a list of acceptable replacement parts. Operators will need to source replacements that meet the reg 21.305 approval standard, which can take time and budget. The absence of a specified replacement model leaves operators exposed to lead-time and cost uncertainty.

In short, the AD’s broad applicability, marking-based identification, historical timing clause, destruction requirement and absence of procedural guidance create a set of practical challenges that operators, maintainers and parts managers will need to manage deliberately.

The AD gives a succinct action list. Compliance requires operators to document and execute the following steps, mapped directly to the AD’s numbered and prose requirements.

1. Plan and schedule inspections across the fleet. The AD requires inspection of “all seat belts” to determine if they bear markings “as having been manufactured by the EON Corporation under ‘TSO-C22’.” Ensure inspection coverage includes belts supplied under airframe manufacturer part numbers. Maintain an inspection checklist that records aircraft identity, seat position, part numbers, serial numbers if present, and the presence or absence of EON/TSO-C22 markings. If AD/RES/20 inspections have already been performed, compile and retain the records because the AD states “Inspection in accordance with AD/RES/20 satisfies the requirements of this AD.”

2. Identify E6000 buckles on marked belts. Where the belt is marked EON/TSO-C22, inspect the buckle assembly to determine whether it is an E6000 buckle. Use the AD’s Note description: an E6000 buckle has “a front cover plate which is pivoted at one end and is pulled at the other end through an arc to release the latch from the buckle,” and can be identified by the type of catch shown in Figure 1. If Figure 1 is not available, rely on the physical description and, where necessary, seek CASA guidance or manufacturer diagrams to confirm identifications.

3. Remove and replace affected assemblies. If an E6000 buckle is fitted, the AD mandates removal of the seat-belt assembly and replacement “with another item approved in accordance with regulation 21.305 of CASR.” Before installation, obtain and file evidence that the replacement item is approved under reg 21.305. That approval evidence should be kept with the aircraft maintenance records and presented at COA issuance or regulatory inspection. Only use replacement parts whose approval status is documented to the satisfaction of the certifying authority.

4. Dispose or de-identify removed parts. The AD requires that “The seat belts removed in compliance with this AD are to be destroyed or have the ‘TSO-C22’ markings removed or totally obliterated.” Establish a disposition procedure that ensures complete destruction or complete obliteration of TSO markings; document the destruction method and retain evidence (e.g., photographs, witness statements, disposal manifest). Consider environmental and waste-handling regulations when destroying hardware. If markings are being obliterated rather than destroying the part, record the method used and why it ensures the part could not be misrepresented, and store photographic evidence.

5. Quarantine and manage spares. Immediately review spare parts inventory for E6000 buckles. The AD bars installation of E6000 buckles “as a spare part after the effective date.” Remove E6000 buckles from active stock, tag them as prohibited from installation, and document their disposition (destruction, return to supplier, export, etc.). Ensure purchasing and stores procedures prevent inadvertent reintroduction.

6. Record-keeping for COA and audits. The AD ties compliance to Certificate of Airworthiness issuance and asserts prior AD/RES/20 inspections suffice. Prepare a compliance package that includes inspection forms, photographic evidence, replacement part approval documentation under reg 21.305, and disposition evidence for removed items. Present this package at COA inspections or on request by CASA. Because the AD does not specify a record retention period, follow standard organisational and regulatory record-retention practices.

7. Liaise with certifying authorities where timing unclear. The AD’s compliance timing phrasing (“Prior to the issue of a Certificate of Airworthiness after 4 June 1987”) and its commencement date of 24 April 2017 can create interpretive questions. Where there is uncertainty about whether a particular aircraft or COA event is impacted, seek written guidance from CASA or the certifying delegate to document acceptance of any alternate compliance demonstration.

8. Update maintenance and procurement procedures. Amend maintenance manuals, parts procurement lists, and inspection schedules to reflect the prohibition on E6000 buckles and to require verification of replacement part approval per reg 21.305. Train inspection crews and stores personnel on identification of EON/TSO-C22 markings and E6000 buckle characteristics as described in the AD’s Note.

9. Manage supplier queries and warranty claims. Where belts or buckles were supplied by third parties, document the facts and consider whether warranty, supplier recall, or recovery actions may be appropriate. The AD does not direct suppliers to remediate costs; any commercial recovery must be pursued under contract or commercial law.

10. Keep evidence of prior AD compliance. If relying on prior compliance under AD/RES/20, ensure records are available and sufficiently detailed to show the scope and findings of those inspections. The AD explicitly states that prior inspection under AD/RES/20 satisfies its inspection requirement, but the burden is on the operator to show that prior inspections were performed and covered the relevant components.

Operational checklist summary based on AD text:

• Inspect every seat belt for EON Corporation and TSO-C22 marking.
• Where marking is present, identify whether an E6000 buckle is fitted per the AD’s physical description and Figure 1 if available.
• Remove and replace any assembly with E6000 buckle using replacement parts approved under reg 21.305 of CASR, retaining approval documentation.
• Destroy removed belts or obliterate their TSO-C22 markings and keep disposal evidence.
• Prevent any installation of E6000 buckles from spare stocks.
• Retain documentation to demonstrate compliance at COA issuance or regulatory inspection.

Following the AD’s numbered requirements verbatim and maintaining auditable documentary evidence is the most direct compliance pathway. Where interpretive uncertainties arise, particularly on timing and acceptable evidence of compliance, seek written clarification from CASA to avoid disputes at COA issuance or regulatory inspection.