AD/CESSNA 210/74 - Alternate Static Air Source Valve

The directive is built around a discrete technical fault, its operative identification, and a tightly scoped remedial step set. The key technical concept is that a part number identification placard on P/N 2013142-18 alternate static air source selector valves was, in some assemblies manufactured between 20 November 2007 and 18 February 2008 (FAA account in Background), installed in a position that can cover the valve's forward port, which is the inlet for static air reference into the valve. When the port is obstructed, static pressure sources for instruments may be compromised, producing erroneous altimeter, airspeed and vertical speed indications, with attendant flight-safety consequences (Background).

Operationally the AD distinguishes three investigative pathways:

• Record-based determination (Requirement 1.b): an inspection of maintenance records to determine whether the specific P/N has been fitted since 19 November 2007. If records show the P/N was not fitted since that date, no further action is required for that aeroplane (Requirement 1.b). CASA allows aeroplane operators holding at least a private pilot’s licence to make and certify that records-based determination (Note 2).

• Physical inspection (Requirement 3): where the P/N is present (either known from records or found), Requirement 3 prescribes a short, focused physical check. The procedure is minimal: adjust seats fully aft, use a flashlight and mirror to ensure the forward port is visible and not covered by the identification placard (Requirement 3.a and 3.b). The AD prescribes removal and disposal of the placard where it obstructs the port (Requirement 4).

• Installation control (Requirement 5): any P/N 2013142-18 valves installed as modifications or replacements on or after the effective date must be inspected in accordance with Requirement 3 prior to installation.

Note 1 provides the lineage of part numbers: P/N 2013142-18 replaced earlier P/Ns 2013142-9, -13 and -17, introducing a traceability element for maintainers and parts management. Note 3 refers operators and maintainers to the FAA AD 2008-10-02, which becomes effective 12 May 2008, for related guidance.

Mechanically the AD imposes an immediate flightworthiness gate: inspections (or record review) for Requirements 1-3 must be completed "before further flight" after the effective date, meaning aircraft cannot be used for further flight until compliant. If an obstructing placard is found, the airworthiness condition is remedied by removal of the placard and verification of an unobstructed port (Requirement 4). For spares and soon-to-be-installed replacement parts, the AD precludes fitting an uninspected P/N 2013142-18 after the effective date (Requirement 5).

The background statement explains incentive and detection features: the issue was discovered during Cessna's quality control; Cessna reportedly corrected parts in its stock; there is no way to determine retrospectively which parts were shipped to the field without inspection; and CASA lacks a method to determine affected aeroplanes or spares without inspection (Background). Those statements frame why CASA requires fleet and spares inspection and why the record-inspection pathway was permitted as a practical variation.

The AD explicitly affects operators and maintainers of Cessna 210-series aeroplanes listed in Table 1 (models 210, T210F, T210G, T210H, T210J, T210K, T210L, T210M, T210N, and T210R), across all serial numbers (Applicability; Table 1). It also affects any entity that holds inventory spares of P/N 2013142-18 selector valves that were manufactured or received after 19 November 2007, since Requirement 5 requires inspection of valves installed as modification or replacement parts on or after the effective date. The background notes indicate the FAA identified affected parts manufactured between 20 November 2007 and 18 February 2008, a window relevant to parts-supply managers and aircraft maintenance organisations (Background).

Key actor groups and how they are affected:

• Aeroplane operators: They must either inspect maintenance records to prove the P/N 2013142-18 was not fitted since 19 November 2007, or physically inspect any installed selector valve per the AD. CASA permits operators who hold at least a private pilot’s licence to perform and certify the records inspection (Note 2). If a placard obstruction is found, operators must ensure the placard is removed and the port is verified unobstructed before further flight (Requirement 4). The Compliance timing imposes operational constraints: Requirements 1-3 must be completed before further flight after the effective date, so operators must schedule inspections promptly to avoid grounding or denying flights.

• Maintenance organisations and certificated aircraft engineers: They are responsible for performing the physical inspection (Requirement 3), removing obstructing placards (Requirement 4), and ensuring that any P/N 2013142-18 fitted after the effective date has been inspected prior to installation (Requirement 5). They will need to record the work consistent with maintenance record-keeping obligations, although the AD itself does not specify record-keeping forms.

• Parts managers and suppliers: Those who stock or supply selector valves P/N 2013142-18 must ensure any part intended for installation is inspected per Requirement 3 prior to fitting (Requirement 5). The Background states that Cessna corrected in-stock parts, but CASA cannot verify how many assemblies shipped to the field still have the issue, which means parts inventory controllers must audit and inspect spares received before installation.

• Regulatory compliance officers and safety managers: The AD imposes an immediate compliance condition and a pre-installation inspection requirement; safety managers need to coordinate fleet inspections, ensure qualified personnel perform inspections, and confirm that any aeroplanes held for operation are compliant before use as required by the "before further flight" compliance constraints.

• Pilots: While pilots are not tasked with performing the physical inspection unless they are also the operator holding at least a private pilot licence (Note 2), pilots bear operational risk if the valve port is obstructed, because the obstruction can cause erroneous altimeter, airspeed and vertical speed indications (Background). Pilots and operators should be aware of the potential for instrument error originating from this component, particularly as a pre-flight consideration.

• International regulators and operators importing/exporting affected parts or aircraft: The AD references the FAA AD; operators flying between jurisdictions will need to comply with CASA’s directive in Australian airspace and be aware of the FAA’s parallel action (Note 3).

The directive also affects the continuity of operations: because Requirements 1-3 must be completed before further flight after the effective date, an operator who cannot quickly verify records or complete physical checks may have to ground the aircraft until compliance is achieved. The AD’s allowance for a records check and the permission for the operator with a private pilot licence to certify that check creates a lower-cost pathway for many small operators, while maintenance organisations will perform physical checks where valves are known or suspected to be P/N 2013142-18.

Duties imposed by the directive are precise and time-critical; rights are more circumscribed and largely procedural.

Primary duties

• Determine applicability: Operators and maintainers must determine whether their aeroplane is included in Table 1 and whether a selector valve P/N 2013142-18 has been installed since 19 November 2007 (Applicability; Requirement 1). Table 1 covers all serial numbers for the listed 210-series models.

• Perform inspection or records check: For aeroplanes in Table 1, operators must either perform the physical inspection set out in Requirement 3 (Requirement 1.a), or inspect maintenance records to determine whether the valve P/N 2013142-18 was fitted after 19 November 2007 (Requirement 1.b). The records-check option is a duty to make a reliable maintenance-record determination and, where applicable, to document that determination as necessary for regulatory compliance.

• Physical inspection procedure: If physical inspection is required, the inspector must adjust the pilot and copilot seats fully aft, use a flashlight and mirror to inspect the forward end of the valve, and confirm the port is clearly visible and not covered by the part number identification placard (Requirement 3.a and 3.b).

• Remediate obstruction: If the inspection finds the placard obstructs the port, the placard must be removed from the valve body, discarded, and the port confirmed open and unobstructed before further flight (Requirement 4).

• Pre-installation check for spares: Any P/N 2013142-18 valve to be installed as a modification or replacement on or after the effective date must be inspected per Requirement 3 before installation (Requirement 5).

• Time-limited compliance duty: Requirements 1, 2 and 3 must be completed before further flight after the effective date; Requirement 4 must be completed before further flight after the Requirement 1 inspection; Requirement 5 applies as of the effective date (Compliance).

Delegations and limited rights

• Operator certification of records check: CASA varied the inspection requirements to permit the aeroplane operator to perform and certify the Requirement 1.b records inspection, provided the operator holds at least a private pilot’s licence (Note 2). This creates a limited right for qualified operators to self-certify the records determination, reducing the immediate need for a maintenance organisation to visit every aircraft where reliable records exist.

• No explicit appeals or alternative compliance procedures are stated in the AD text itself. The AD does, however, reference the FAA AD, providing cross-reference to another regulator’s action that may contain further guidance (Note 3).

What the AD does not do

• The AD does not set out penalties or enforcement procedures within the text supplied. It prescribes the inspections and remedial actions, and compliance timing, but does not specify administrative sanctions or criminal penalties in the directive itself.

• The AD does not prescribe a detailed form of maintenance record entry or particular certification wording for the records-based determination. It simply permits the records inspection and certifying by an operator with at least a private pilot licence.

• The AD does not require replacement of the valve or any redesign; the remedial action is limited to removal of the placard if it obstructs the port and inspection before installation of replacement parts.

Practical compliance duties for affected parties therefore include obtaining and checking maintenance records, scheduling and performing physical inspections where records are insufficient or indicate the P/N was fitted, removing placards where obstructive, and ensuring any new replacements are inspected before fitting. The "before further flight" timing creates an immediate operational duty: aircraft cannot fly again until the required checks and remediation are completed.

The AD text supplied does not specify statutory penalties or an explicit enforcement regime within its own wording. It prescribes mandatory actions and compliance timing,Requirements 1 through 5 and the Compliance section,but it does not contain a sanctions schedule or reference to the enforcement machinery and penalties that CASA might apply for non-compliance. Absent additional statutory text in the document, one must read the AD as creating enforceable regulatory obligations under CASA’s powers, while recognising that enforcement procedures and penalties are governed by broader civil aviation legislation and CASA’s compliance and enforcement policies, which are not reproduced in the AD itself.

Operational implications for enforcement and liability that follow from the directive's terms, and that practitioners will typically monitor, include:

• Immediate grounding risk: Because Requirements 1-3 must be completed "before further flight after the effective date", an operator that cannot make the records determination or perform the physical inspection in time effectively must not operate the aircraft until compliance has been achieved. CASA may treat operation without completing the mandated checks as operation of an aircraft not meeting an AD, which regulators commonly treat as non-compliance with airworthiness directives.

• Duty to correct hazardous configurations: The AD provides specific remedial action,removing and discarding any placard obstructing the port. Continuing to operate with an obstructed static port, given the stated risk of erroneous instrument indications, would expose operators to safety and regulatory consequences if discovered.

• Record-keeping exposure: The AD explicitly allows a records-based determination (Requirement 1.b) and permits an operator with at least a private pilot licence to certify that determination (Note 2). In practice, records certification creates evidentiary obligations; if maintenance records are incomplete or ambiguous, the operator who self-certifies may face scrutiny. The AD does not specify the documentary standard, but operators should expect to produce records to show they complied with the AD if required by CASA.

• Manufacturer and supplier liability: The background notes that Cessna corrected parts held in stock and that the FAA found assemblies manufactured in a discrete window had the placard problem (Background). The AD does not prescribe recall-like recovery actions beyond inspection and removal of the placard, but commercial liability or warranty issues between suppliers, installers and operators are governed by contract and civil liability regimes outside the AD.

• Cross-jurisdictional enforcement: The AD references FAA AD 2008-10-02. Operators flying internationally might face parallel obligations in multiple jurisdictions. Enforcement action by CASA would be under Australian law and CASA’s powers; the AD does not delineate extra-territorial reach but does require compliance for Australian-registered aeroplanes subject to CASA.

Because the text does not include statutory penalty clauses, practitioners should look to CASA’s broader regulatory framework and the Civil Aviation Safety Regulations and Act for the specific enforcement mechanisms and sanctions. The AD’s compliance deadlines and the "before further flight" language create an immediate operational compliance imperative, and CASA’s normal practice is that flight with an unresolved AD is a regulatory breach that may attract enforcement action.

The directive interacts functionally and administratively with other regulatory instruments and the broader aviation safety framework, though it does not replicate those instruments. Two cross-references appear within the text, and other legal interactions are implicit.

Explicit interactions

• FAA AD reference: Note 3 refers operators to FAA AD 2008-10-02 Amdt 39-15508, effective 12 May 2008. The CASA AD explicitly states that FAA AD 2008-10-02 "refers" and effectively aligns CASA’s action with the FAA’s finding and remedy approach for the same defect (Note 3; Background). This cross-reference indicates regulatory harmonisation between CASA and FAA on this component-level safety matter. Where aircraft, components or operators have regulatory links to the United States, the FAA AD provides additional guidance and may be the origin of the corrective action.

• Manufacturer corrective action: The Background states Cessna corrected parts held in stock at the manufacturer, which is an industry-level corrective activity that interacts with statutory obligations for airworthiness and supply chain controls. That manufacturer-level activity is an administrative fact informing the AD but is not a legal substitution for the AD’s inspection and remediation duties.

Implicit interactions

• Maintenance record-keeping and certification regimes: Requirement 1.b (records inspection) and Note 2 (operator qualification to certify a records determination) interact with the legal obligations for maintaining accurate and auditable maintenance records. Those obligations typically reside in broader civil aviation maintenance and airworthiness regulations. The AD’s allowance for an operator to certify a records check presumes that maintenance records are adequate to establish whether P/N 2013142-18 was fitted.

• Airworthiness and operational law: The directive’s "before further flight" compliance requirement implicates statutory obligations to only operate aircraft that comply with applicable ADs and are in an airworthy condition. Generally, regulators require compliance with ADs as a condition of continuing airworthiness. The AD itself does not restate the statutory duty to fly only airworthy aircraft, but it operates within that legal ecosystem.

• Supply and installation law: Requirement 5 interacts with obligations on who may install parts and how they must be checked prior to installation. Many jurisdictions restrict installation of parts and the certification of maintenance work to appropriately licenced engineers. The AD states valves "installed as modification or replacement parts on or after the effective date of this Directive must be inspected in accordance with Requirement 3 prior to installation" (Requirement 5). That instruction interfaces with legal limits on who may perform installations and what certification entries are needed.

• Tort and contract law: The AD does not address civil liability, but operators, maintainers and parts suppliers will consider how the AD’s technical facts and compliance steps affect claims or contractual obligations. The AD documents the safety risk and specifies a minimal remedial action; failure to follow the AD could be relevant in litigation or insurance contexts, though the AD text does not create or define those legal consequences.

• International operation and export/import controls: The FAA connection and the fact that the FAA identified the problem in parts shipped into the field means operators and parts suppliers involved in cross-border movements will need to coordinate compliance across jurisdictions. CASA’s adoption of a directive based on the FAA’s findings demonstrates an interplay of national regulators addressing a common technical risk. The AD itself does not state how compliance is to be certified for cross-border operations.

In sum, the AD sits within a web of aviation safety law: it cross-references the FAA AD, presumes compliance with maintenance-record standards and airworthiness obligations, and imposes actions that intersect with who is authorised to carry out inspections and installations. Practitioners should treat the AD as an instrument that triggers duties under the broader civil aviation statutory and regulatory framework and coordinate compliance with the relevant maintenance, certification and record-keeping rules that govern aviation activity in their jurisdiction.

The instrument text provided identifies a single directive with an effective date and references related documents; it does not contain a multi-stage amendment history within itself. The AD becomes effective on 13 May 2008, and is dated 6 May 2008 in the signature block by James Coyne, Delegate of the Civil Aviation Safety Authority (signature date 6 May 2008; Compliance says effective 13 May 2008). The AD explicitly refers to FAA AD 2008-10-02 Amdt 39-15508 which becomes effective 12 May 2008 (Note 3), indicating contemporaneous action between CASA and FAA in May 2008.

Specific historical points present in the text include:

• Part-number lineage: Note 1 states that P/N 2013142-18 replaced earlier part numbers 2013142-9, -13 and -17. This is a historical identification of the part number progression relevant to maintainers trying to determine part equivalence and trace older parts.

• Manufacturing window cited by the FAA: The Background reports that the FAA identified affected part assemblies manufactured between 20 November 2007 and 18 February 2008. CASA’s applicability language instead uses a cut-off date of installation after 19 November 2007. The difference in dates establishes the locus of the problem and frames parts-supply tracing efforts.

• CASA variation to inspection requirements: The Background states "CASA has varied the inspection requirements to allow the aeroplane operator to determine if a P/N 2013142-18 selector valve has been installed since 19 November 2007." This is an administrative variation in the way CASA applied the FAA’s findings, creating a records-based pathway for compliance. The AD itself formalises that variation through Requirement 1.b and Note 2.

Absent from the supplied text are subsequent amendments, revocations, superseding ADs, or dates of any later changes. The AD is a stand-alone document effective 13 May 2008; to determine whether it was later amended, superseded or revoked, a practitioner would need to consult CASA’s consolidated AD registry or an updated legislative database.

For historical context the AD’s internal references provide a narrow timeline: the suspected problematic manufacturing window (20 November 2007 to 18 February 2008 per FAA), the CA SA cut-off for installations after 19 November 2007, FAA AD effective date 12 May 2008, CASA AD effective date 13 May 2008, and the signature date 6 May 2008. These dates are the concrete amendment-history data points contained in the text.

The text of the directive does not record or reference any litigation arising from this AD or the underlying component issue. There is no mention within the supplied AD document of judicial proceedings, administrative appeals, or contested enforcement actions relating to AD/CESSNA 210/74. The Background references only FAA investigative and manufacturer corrective steps and CASA’s administrative determination and variation; it does not refer to disputes or litigation.

Given the absence of litigation references in the AD, practitioners seeking litigation history would need to perform a separate search of court records, tribunal files, and CASA enforcement records. The AD itself provides the operative facts that would be relevant in litigation,namely that a placard in some assemblies was installed over the valve port and that this could cause erroneous instrument indications,but it contains no description of enforcement consequences or any record of contested matters. If litigation exists, details would be found outside the AD in court or tribunal decisions, or in CASA’s enforcement disclosures.

In short, based on the provided text alone: there is no litigation history recorded in the AD document.

The AD’s succinct language hides several practical and legal pitfalls for operators, maintainers, parts managers and compliance officers. The following are concrete "gotchas" rooted in the text.

1. "Before further flight" timing creates immediate operational constraint. Requirements 1, 2 and 3 must be completed before further flight after the effective date (Compliance). If an operator has multiple aircraft or a flight scheduled imminently, the aircraft cannot lawfully depart until the records determination or the physical inspection is complete. The AD does not provide a grace period. Operational planners must therefore schedule inspections immediately.

2. Records-check option can be used only if documentation is reliable and shows P/N 2013142-18 was not installed since 19 November 2007. Requirement 1.b allows inspection of maintenance records to determine whether P/N 2013142-18 has been installed since 19 November 2007; if not, no further action is necessary. However, the AD does not define the standard of proof or what constitutes adequate documentation. Operators relying on this pathway expose themselves to post-fact scrutiny if records are incomplete or ambiguous.

3. Self-certification by some operators has limits. Note 2 permits the records inspection and determination to be accomplished and certified by the aeroplane operator provided they hold at least a private pilot’s licence. That is permissive, but it does not authorise a private pilot to perform mechanical work beyond what their licence permits, nor does it relieve maintenance organisations of their legal responsibilities where those apply. The AD does not address whether a private pilot operator may perform the physical inspection under Requirement 3. Therefore, operators should interpret Note 2 narrowly as applying to certification of records inspections only.

4. The inspection requires awkward physical access to the forward port. Requirement 3 mandates that the pilot and copilot seats be adjusted as far aft as possible and that a flashlight and mirror be used to inspect the selector valve. This may be physically awkward and may not be possible without moving seats or removing panels in some installations. The AD does not authorise seat removal or panel removal; if further access is needed to see the port, a qualified maintenance person may need to perform additional removal work to effect the check.

5. Spares and newly procured parts may still carry the defect. Requirement 5 requires inspection of P/N 2013142-18 valves installed as modifications or replacement parts on or after the effective date, "prior to installation." Cessna reported correcting parts in its stock, but the FAA indicated that some parts shipped to the field may still be defective (Background). Parts held in non-manufacturer inventories, or parts acquired from secondary markets, may also be affected. Parts managers must inspect spares prior to installation and manage inventory tagging.

6. Inconsistency in part-number history breeds confusion. Note 1 states P/N 2013142-18 replaced P/Ns 2013142-9, -13 and -17. If maintenance records list earlier P/Ns or suppliers use different numbering, tracing which physical component is actually installed may be complex. Practically, this increases transaction costs for records review and component identification.

7. The AD does not spell out documentation of compliance. While maintenance entries would be required under broader regulatory schemes, the AD does not specify the exact record entry wording to show compliance. Operators should ensure entries plainly document the inspection undertaken, the results, and any remedial action (placard removal) to avoid evidentiary gaps.

8. Liability for removal and disposal. Requirement 4 requires removal and discard of the placard when it obstructs the port. The instruction is minimal and does not permit or require replacement with another placard in a different location. Operators should ensure removal is done in accordance with maintenance practise and recorded properly.

9. International differences in dates and content. The FAA manufacturing window is given as 20 November 2007 to 18 February 2008, while CASA’s applicability focuses on installation after 19 November 2007. That one-day discrepancy and the slightly different scopes mean cross-jurisdictional operators should be cautious and treat any valve P/N 2013142-18 installed in the indicated timeframe as potentially affected.

10. The AD is silent on enforcement and penalties. The AD requires action but does not state specific sanctions for non-compliance. Operators should therefore assume CASA can apply its standard enforcement tools for non-compliance with airworthiness directives, even though those tools are not recited in the AD.

11. Failure to inspect before fitting replacement parts. Requirement 5 expressly requires inspection "prior to installation." Installing a P/N 2013142-18 without following Requirement 3 could create a new unsafe configuration and a subsequent compliance breach. Maintenance shops must embed Requirement 5 into parts-procurement and installation checklists.

12. Practical detection risk. The Background notes the placard covers the port and that the problem was discovered during a quality control check. The placement of the placard could be subtle; superficial inspection may miss partial obstruction that still causes instrument errors. The AD’s inspection method relies on visual access with seats fully aft, a torch and mirror; this may not reveal marginal coverage in all installations.

These gotchas are concrete operational and compliance risks that arise directly from how the AD is framed and the practicalities of implementing its inspection and remedial steps.

Compliance is framed in discrete steps that map directly to the AD’s numbered Requirements. The AD prescribes timing, methods and remedial action. The following is a practical compliance checklist grounded in the AD text; it does not create new duties, but translates the AD’s requirements into operational steps.

1. Determine applicability immediately (same day as AD effective date). Check the aeroplane model and serial number against Table 1. If the aircraft is one of the listed 210-series models, proceed (Applicability; Table 1).

2. For each aeroplane in scope, perform either the records check (Requirement 1.b) or the physical inspection (Requirement 1.a).

   • Records check route (Requirement 1.b and Note 2): Inspect maintenance records to determine whether an alternate static air source selector valve P/N 2013142-18 has been installed since 19 November 2007. If records show the part was not installed in that period, no further action is required under this AD. Where the records review is sufficient, the aeroplane operator may perform and certify that determination if they hold at least a private pilot’s licence (Note 2). Ensure the records entry is clear and retained in accordance with maintenance-record obligations. Because the AD does not define the standard of proof, document the sources examined (work orders, logbook entries, parts-invoice or installation tags) and the reasoning for the determination.

   • Physical inspection route (Requirement 1.a and Requirement 3): If records show P/N 2013142-18 was installed since 19 November 2007 or records are inconclusive, perform the on-aircraft inspection per Requirement 3:

     a. Adjust the pilot and copilot seats as far aft as possible (Requirement 3.a).

     b. Use a flashlight and a mirror to inspect the alternate static air source selector valve and assure that the port on the forward end of the valve is clearly visible and not covered by the part number identification placard (Requirement 3.b).

     c. If the placard obstructs the port, remove and discard the placard from the valve body and ensure the port is open and unobstructed (Requirement 4). Record the work performed.

3. Ensure compliance "before further flight". Requirements 1, 2 and 3 are to be completed before further flight after the effective date (Compliance). If an obstruction is found and placard removal is required, that removal must be done before further flight after the Requirement 1 inspection (Requirement 4 and Compliance). Plan inspections so that aircraft are not scheduled for flight until compliance is recorded.

4. For any P/N 2013142-18 valve to be installed as a modification or replacement on or after the effective date, inspect the valve per Requirement 3 prior to installation (Requirement 5). Incorporate this step into parts-receiving and pre-installation checks. Tag inspected spares to indicate they have been checked.

5. Record-keeping: Although the AD does not prescribe exact record entry wording, maintain a clear maintenance entry for each aeroplane that includes: date of inspection or records check, name and qualification of person performing it (and whether the person is the operator with at least a private pilot licence where Note 2 applies), results of the inspection or records check, remediation performed (placard removed and disposed), part numbers and serial numbers inspected, and any follow-on actions. Keep the documentation readily available for CASA inspection.

6. Inventory management: For parts inventory that might contain P/N 2013142-18, locate and inspect any affected spares immediately, and tag or quarantine parts as inspected. The AD’s Requirement 5 requires inspection prior to installation after the effective date; best practice is to inspect stock now and place a verified inspection tag on compliant spares. Note the Background’s point that Cessna corrected stock parts but cannot verify shipments, so operators should assume that spares received in the suspect window may require inspection.

7. Practical tools and personnel: The inspection requires a flashlight and mirror and the ability to adjust seats aft fully (Requirement 3). Make these tools available. If the physical geometry of a given installation prevents adequate visual inspection with seats aft, a qualified maintenance person should consider removal of panels or use of borescopes in accordance with maintenance practice; the AD itself specifies only the minimal inspection technique but does not prohibit more intrusive inspections if required to verify port condition.

8. For ambiguous cases, consult CASA or authorised maintenance organisation. If records are unclear or the inspection is inconclusive, obtain assistance from a certificated maintenance organisation or contact CASA for guidance. The AD gives no explicit alternative compliance pathway; CASA remains the issuing authority and can advise on acceptable evidentiary standards if required.

9. Communicate with stakeholders: Notify crew, operations staff and maintenance about the inspection status of each aircraft to avoid inadvertent scheduling of non-compliant aircraft. Ensure parts procurement staff and maintenance teams are briefed on Requirement 5 and are instructed not to fit uninspected P/N 2013142-18 parts.

10. Cross-reference FAA AD for additional procedural detail: Note 3 refers to the FAA AD. Consult FAA AD 2008-10-02 Amdt 39-15508 for additional background or procedural recommendations that may assist in implementing the CASA AD. Differences in wording should be noted, but the CASA AD sets the binding requirement for Australian-registered aircraft subject to CASA rules.

The AD’s procedural requirements are narrowly drawn and technically simple, but they must be executed promptly because of the "before further flight" timing. The main compliance costs are staff time to inspect maintenance records, manpower to perform the visual checks, potential short grounding of aircraft pending inspection, and the administrative work of documenting each inspection and remedial action.

Operators and maintainers should embed these steps into their aircraft maintenance programmes immediately, ensure personnel responsibilities are clear (particularly if an operator with only a private pilot licence intends to use the records-based pathway), and maintain documentation that will show CASA inspectors what was done, when and by whom.