AD/SEATS/28 Amdt 1 - Passenger Seat Backrest - Replacement

The AD revolves around several interlocking concepts that determine its scope, obligations and operational effects.

• Applicability by part number and SB reference. The AD applies to passenger seat assemblies of Aviointeriors P/N 12M( )( )-( )( )( )( )( )( ) that are equipped with backrest P/N 313033000000 or 313033100000, "as listed in Section 1.A of Aviointeriors Service Bulletin (SB) 12M/F68-06" (Applicability). The AD makes the relevant SB section an integral part of the definition of affected articles; operators must consult that SB to identify which seat serials or model variants are covered.

• Mandatory replacement action. The core duty is to replace the identified backrests "in accordance with the instructions given in Aviointeriors Service Bulletin (SB) 12M/F68-06" unless already accomplished (Requirement 1). This ties the required method and scope to the manufacturer’s SB text.

• Installation prohibition. The AD prohibits installation of the identified backrest P/Ns, whether unmarked or marked "O" as per SB 12M/F68-01 Revision 1, on any aircraft after the effective date (Requirement 2). This creates an absolute bar on future installations of those backrests, contingent on the marking status identified in the SB.

• Operational dispensation conditions. Where immediate replacement cannot be accomplished within the compliance time, the AD allows continued dispatch with the affected seat installed only subject to three conditions: placarding the seat "Do not occupy" and ensuring it remains unoccupied; ensuring it does not block any emergency exit; and ensuring it does not restrict access to the main aisle (Requirement 3(a)-(c)). This creates a limited, conditional deferral mechanism that preserves regulatory compliance while allowing temporary operation.

• Life-limitation and cycle thresholds. The compliance timing is expressed in total flight cycles since first installation: replacement before 13 000 total FC or by 31 January 2009, whichever first. If seats have already exceeded that FC threshold at the effective date, replacement is required within 500 FC after the effective date or by 31 January 2009, whichever first (Compliance). The AD therefore imposes a life-limitation-based replacement regime and provides accelerated replacement deadlines for seats that have already accrued cycles.

• Reference to external directives and manufacturer documents. The AD explicitly refers to Aviointeriors SB 12M/F68-06 and SB 12M/F68-01 Rev 1 for technical instructions and marking conventions, and it notes EASA AD 2008-0135 (Requirement note). The AD thus integrates manufacturer guidance and an overseas regulator’s AD into the required compliance path.

These concepts together define the AD’s operational and compliance architecture: identify affected parts via SB cross-reference, follow manufacturer instructions to replace them by specified cycle/date thresholds, do not reinstall prohibited parts, and use a constrained operational exception if immediate replacement is impracticable.

The text identifies parties by role rather than by statutory office, and the effect is targeted.

• Aircraft operators and owners. The AD’s primary practical addressees are operators and owners of aircraft that have Aviointeriors passenger seats P/N 12M( )( )-( )( )( )( )( )( ) equipped with backrests P/N 313033000000 or 313033100000. The Applicability clause notes that the affected seats are "known to be installed on, but not limited to, the ATR 42 and ATR 72 series aircraft," which signals that operators of those aircraft types should particularly verify whether they have affected seats (Applicability).

• Maintenance organisations and engineers. Replacement "in accordance with the instructions given in Aviointeriors Service Bulletin (SB) 12M/F68-06" will fall to maintenance providers authorised to perform the work. The AD therefore affects those who hold the technical capability and certification to remove and refit seat backrests per the SB.

• Aircraft dispatch personnel and cabin crew. The temporary dispensation allowing dispatch with an affected seat in place requires the seat to be placarded “Do not occupy” and controlled so it remains unoccupied; this imposes operational responsibilities on dispatch staff, cabin crew and ground operations for placarding and passenger briefing and for ensuring egress and aisle access are not impeded (Requirement 3).

• Parts managers and procurement. The installation prohibition on affected backrests (Requirement 2) makes parts managers responsible for screening incoming inventory and preventing the installation of seats fitted with those backrests; they must check markings per SB 12M/F68-01 Rev 1.

• Regulators and certification delegates. The issuing body, the Civil Aviation Safety Authority (via the delegate signature), is the issuer and source of the AD. The AD cross-references EASA AD 2008-0135, indicating that European regulatory activity played a role in the directive’s rationale and that operators subject to both regimes will need to harmonise compliance steps (Requirement note).

• Passengers and insurers (indirectly). While not directly addressed, the AD’s safety rationale concerns passenger and crew injury risk from backrest failures during an emergency landing. Insurers and risk managers should therefore treat the AD as affecting regulatory compliance and operational safety exposure.

Who pays: the AD text does not quantify costs or specify who bears replacement costs, but the practical duty to replace parts "in accordance with" the manufacturer SB and to ensure non-installation implies that operators/owners and their maintenance organisations will carry the direct costs of parts, labour and any associated downtime. The AD does not specify financial assistance, reimbursement, or indemnities in the text provided. The AD’s applicability statement and directions therefore impose discrete operational and financial responsibilities on the operator/owner and their maintenance providers.

The AD sets out a limited set of mandatory duties and conditional allowances. It does not include express statutory "rights" such as reimbursement or appeal procedures in the text supplied; the obligations are presented as duties that must be performed by operators and maintenance organisations.

Mandatory duties

• Identify affected seats. Operators must determine whether their aircraft have Aviointeriors passenger seats P/N 12M( )( )-( )( )( )( )( )( ) equipped with backrest P/N 313033000000 or 313033100000, as listed in Section 1.A of Aviointeriors SB 12M/F68-06 (Applicability). The AD embeds the SB’s Section 1.A as the source of the inventory of affected items.

• Replace affected backrests. Unless already accomplished, replace backrest P/N 313033000000 and/or P/N 313033100000 "in accordance with the instructions given in Aviointeriors Service Bulletin (SB) 12M/F68-06" (Requirement 1). The AD makes compliance with the manufacturer’s SB the required method.

• Do not install prohibited backrests. No person shall install Aviointeriors passenger seat assembly P/N 12M( )( )-( )( )( )( )( )( ) with backrests having P/N 313033000000 or 313033100000 (either unmarked or marked with "O" as per SB 12M/F68-01 Revision 1) on any aircraft (Requirement 2). This is an absolute prohibition with a clear marking test tied to SB 12M/F68-01 Rev 1.

Compliance timing duties

• Meet cycle and date thresholds. Replace before accumulation of 13 000 total FC since the seat’s first installation on an aircraft, but no later than 31 January 2009, whichever occurs first. If seats have already exceeded the FC threshold at the AD effective date, perform replacement within 500 FC after the effective date or no later than 31 January 2009, whichever first (Compliance).

Conditional allowances (temporary exceptions)

• Temporary dispatch with affected seat. If replacement cannot be completed within the required time, an operator may dispatch the aircraft with the affected seat installed provided the seat is placarded "Do not occupy" and measures are taken to ensure it remains unoccupied; the seat does not block any emergency exit; and the seat does not restrict any passenger’s access to the main aisle (Requirement 3).

Documentation and method obligations

• Follow the Aviointeriors SB instructions for the replacement procedure. The AD requires the replacement be accomplished in accordance with Aviointeriors SB 12M/F68-06, thereby delegating technical method to the manufacturer’s documented instructions (Requirement 1).

Rights and unspecified matters

• The AD text does not specify statutory rights such as review, appeal, cost recovery, or extensions; it does not include an enforcement or penalty clause in the snippet provided. The AD does explicitly recognise that seats already replaced need not be replaced again ("Unless already accomplished"), which functions as a safe-harbour recognition of prior compliance (Requirement 1). Any further procedural rights or dispute mechanisms are not mentioned in the provided text.

Operational implications of duties

• Recordkeeping and cycle-tracking. Because compliance is tied to total flight cycles since first installation, operators must be able to establish the seat’s first-installation FC and to track accumulated cycles to determine whether the 13 000 FC threshold has been reached and whether the alternate 500 FC deadline applies (Compliance).

• Inventory control. The installation prohibition tied to SB marking requires parts and inventory managers to verify markings as per SB 12M/F68-01 Rev 1 before installing or reusing affected items (Requirement 2).

The AD sets clear technical duties and conditional allowances but does not address mitigation of costs, appeals, or sanctions within the supplied text.

The AD text provided does not specify civil or criminal penalties, specific enforcement mechanisms, or explicit sanctioning procedures. It is an airworthiness directive setting mandatory maintenance and operational requirements; such directives generally carry a regulatory force, but the supplied text does not itself state fines, suspension measures, or administrative enforcement steps.

What the AD does provide that is relevant to enforcement

• Mandatory nature of actions. The AD frames its instructions as requirements: replace the specified backrests "in accordance with" the Aviointeriors SB; do not install specified backrests; only dispatch with affected seats under named conditions (Requirement). The wording "No person shall install" and the replacement mandate indicate compulsory obligations.

• Compliance deadlines. The AD sets concrete time-based and life-limited compliance triggers: replace before 13 000 total flight cycles or by 31 January 2009, and if seats have already exceeded the FC threshold at the AD's effective date, replace within 500 FC or no later than 31 January 2009 (Compliance). Those deadlines establish the temporal boundary for compliance assessment.

• Effective date. The amendment becomes effective on 28 August 2008, which establishes when the AD’s prohibitions and obligations are legally in force (this Amendment becomes effective on 28 August 2008).

What is not in the text

• No penalties specified. The AD snippet does not state monetary penalties, licence suspensions, or criminal sanctions for breach. It also does not set out the specific regulatory process for an enforcement action, such as notices of non-compliance or rectification periods beyond the compliance schedule already in the AD.

• No administrative appeal or extension procedure mentioned. The AD does not include provisions for seeking an extension, exemption, or alternative method of compliance in the text provided.

Practical enforcement consequences that follow from the AD’s structure

• Regulators commonly treat ADs as mandatory and inspect for compliance; failure to comply with an AD typically exposes an operator to regulatory enforcement under the broader aviation safety regime. The AD’s concrete deadlines and absolute installation prohibition provide objective points for regulatory inspection. While the AD does not stipulate the sanctions, the presence of fixed compliance triggers makes it straightforward for a regulator to determine non-compliance at audit or post-incident review.

• Operational risk and exposure. Operators who continue to use affected seats beyond the permitted exceptional dispatch conditions accept exposure to regulatory scrutiny. The AD’s allowance for temporary dispatch with an affected seat is conditional and should be documented and implemented precisely to reduce enforcement risk.

To determine the precise penalties or enforcement processes that would be applied, an operator would need to consult the broader regulatory framework and enforcement procedures of the Civil Aviation Safety Authority or equivalent regulator. The AD as provided sets obligations and deadlines but does not itself enumerate enforcement mechanisms or penalties.

The text of the AD explicitly references manufacturer service bulletins and an overseas regulator’s AD, thereby creating cross-document obligations. It does not cite specific domestic statutes or other Australian legislative instruments in the excerpt provided.

Document cross-references and dependencies

• Manufacturer service bulletins as normative. The AD requires replacement "in accordance with the instructions given in Aviointeriors Service Bulletin (SB) 12M/F68-06" and refers to marking conventions in Aviointeriors SB 12M/F68-01 Revision 1 (Applicability; Requirement). This means compliance with the AD is achieved by following those SBs; the SBs are therefore normative and operationally integrated into the AD. Operators must consult those documents for technical steps, marking definitions and identification procedures.

• Reference to EASA AD 2008-0135. The AD notes "Note: EASA AD 2008-0135 refers." This situates the amendment in an international regulatory context where a European Aviation Safety Agency AD on the same or related subject exists. For operators subject to both CASA and EASA requirements, the EASA AD is likely to be relevant for harmonising actions, but the AD does not specify how conflicts or differences between the ADs are to be resolved.

Interface with airworthiness certification and maintenance regimes

• Life-limitation and maintenance recordkeeping. The compliance schedule is expressed in total flight cycles since first installation on an aircraft (Compliance). This ties the AD into existing airworthiness recordkeeping requirements and lifecycle maintenance obligations. Operators must be able to identify the seat’s first-installation date and account for subsequent flight cycles. Compliance therefore interacts with maintenance release procedures, logbooks, and aircraft records.

• Installation prohibition affects supply and inventory contract processes. The absolute prohibition on installing certain backrests (Requirement 2) imposes a duty on parts management and maintenance organisations not to use affected stock. This interacts with procurement, stocking and inventory control procedures and with any contractual warranties or supplier obligations regarding parts conformity.

Regulatory hierarchy and implied legal force

• The AD is an instrument of the Civil Aviation Safety Authority delegate (signed by David Villiers). The AD’s text does not reproduce the enabling statute or enforcement powers, but as an AD it functions within the airworthiness regulatory regime and is expressed in mandatory terms. The precise legal effect in administrative-law terms (for example remedies for affected parties or judicial review avenues) is not set out in this text.

What is not stated or is outside the AD text

• No explicit cross-reference to broader Australian statutes, such as the Civil Aviation Safety Act or Safety Regulation, is contained within the supplied text. The AD does not state how conflicts with other national instruments should be reconciled. The AD does not address commercial law interactions such as supplier liabilities, warranty claims for replaced parts, or insurance coverage for the cost of replacement; these remain matters for parties’ contracts and insurers.

In sum, the AD makes the manufacturer’s SBs and the referenced EASA AD operationally relevant to affected Australian operators. It interacts with recordkeeping, maintenance release and parts inventory systems, and it functions within the broader but unstated domestic airworthiness regulatory framework.

The supplied text contains a succinct amendment history embedded in the background and the heading information.

• Original AD effective date. The AD’s background notes that "The original issue of this Airworthiness Directive became effective 15 February 2007" (Background). That establishes an initial regulatory action addressing seat backrest failures.

• This amendment’s effective date. The amendment in the supplied text "becomes effective on 28 August 2008" (this Amendment becomes effective on 28 August 2008). The AD is labelled "AD/SEATS/28 Amdt 1" and dated "9/2008" in the heading, indicating the amendment number and the month/year tag.

• Why the amendment was issued. The Background explains the causal reason for amendment: since the original AD, Aviointeriors identified a life limitation for backrests that do not have tool marks, and therefore the amendment "mandates the replacement of those backrests before reaching the specified threshold" (Background). Previously reported failures involved backrest recline actuator metal fittings having tool marks; the identification of life limitations on unmarked fittings broadened the required action to include backrests without tool marks and thus required the amendment.

• Relationship to original AD text. The amendment retains the original safety purpose,prevent failures that could result in injury during an emergency landing,and adds a life-limitation-driven replacement schedule for additional backrest variants identified by the manufacturer (Background). The AD’s Requirement and Compliance sections set out replacement and installation prohibition duties that function as an amendment to, or clarification of, the original AD’s mandatory work.

• Cross-references. The AD’s label and the note referencing EASA AD 2008-0135 indicate that this amendment is contemporaneous with related international regulatory activity in mid-2008 (Requirement note). The exact textual changes from the original AD are not reproduced in full; however, the amendment replaces or supplements previous obligations by adding the life-limitation and the prohibition on re-installation of certain marked/unmarked backrests.

• Signature and issuance. The AD is signed by David Villiers, Delegate of the Civil Aviation Safety Authority, and dated 17 July 2008 in the document footer (David Villiers, Delegate of the Civil Aviation Safety Authority; 17 July 2008). The amendment’s effective date of 28 August 2008 is therefore after the signature date, representing typical promulgation timing.

The supplied text does not list prior amendment versions beyond the original issue and this Amendment 1. It does not include redline comparisons or a chronological list of editorial changes beyond the narrative explanation that Aviointeriors identified a life limitation prompting the amendment.

The supplied AD text contains no information about litigation. There are no references, within this document, to court challenges, tribunal decisions, or precedent concerning this AD or its subject matter.

What can be stated from the text

• No cases named. The instrument does not name any judicial proceedings, nor does it refer to judicial interpretations or disputes about the AD’s scope, enforcement or technical content.

• No administrative appeals recorded. The text does not mention appeals, petitions for reconsideration, or other administrative dispute mechanisms in connection with this AD.

Implications for research or risk assessment

• Absence of litigation references in the AD means that, based solely on this document, there is no direct documentary evidence of any legal challenges, regulatory enforcement actions, or court determinations specific to AD/SEATS/28 or Amdt 1 in this text. To establish whether litigation exists, a researcher would need to consult court records, regulatory enforcement logs, or other public legal databases; none of that material is present in the supplied AD.

• Because the AD sets deadlines and mandatory instructions, litigation risk for operators typically involves enforcement action for non-compliance or disputes arising from cost allocation, warranty claims or insurance coverage. There is no mention of those matters in the AD, and therefore they cannot be asserted here.

In short, the AD does not include a litigation history. The document is limited to the regulatory directive itself, its technical references and its dates; it does not report on subsequent or prior legal proceedings.

The AD’s wording, dependencies and deadlines give rise to a number of operational pitfalls and interpretation risks operators should note. The following are grounded in the AD language.

• Applicability depends on an external SB Section. The AD applies to seats "as listed in Section 1.A of Aviointeriors Service Bulletin (SB) 12M/F68-06" (Applicability). If an operator does not obtain and consult SB 12M/F68-06 Section 1.A, they may misidentify whether specific seat serials or variants are affected. The AD makes the SB’s section effectively part of the definition of affected hardware, so omission of that step is a compliance risk.

• Marking test for installation prohibition. The installation prohibition covers backrests "being either unmarked or marked with 'O' as per Aviointeriors SB 12M/F68-01 Revision 1" (Requirement 2). Operators must obtain SB 12M/F68-01 Rev 1 to understand the marking schema and to verify whether a backrest is unmarked or marked "O". Relying on visual assumptions without the SB’s marking definitions risks wrongful installation or erroneous scrappage.

• Flight-cycle accounting complexity. Compliance pivots on "total flight cycles (FC) since the seat’s first installation on an aircraft" with a threshold of 13 000 FC and, for already-exceeded seats, a 500-FC replacement window after the AD effective date (Compliance). Operators must be able to establish the seat’s first-installation FC baseline and maintain accurate FC accumulation records for each seat assembly. Seats that have moved between aircraft may have ambiguous first-installation records; the AD’s language ties the cycles to "since the seat’s first installation on an aircraft," so migration history matters.

• Interplay of cycle threshold and calendar date. The requirement uses a dual trigger: either 13 000 FC or no later than 31 January 2009, whichever occurs first. For seats with low utilisation, the calendar date may be the binding deadline; for high-utilisation seats, the FC threshold may trigger replacement earlier than the date. Operators must model both triggers to determine actual replacement windows.

• The alternative dispatch allowance is conditional and requires active controls. If an operator relies on the dispatch exception, it must ensure the seat is placarded "Do not occupy" and take measures to keep it unoccupied, ensure it does not block an emergency exit and that it does not restrict access to the main aisle (Requirement 3). Failure in any of these controls during a flight may convert a permitted deferral into non-compliance. The AD does not specify the means of documenting these measures; operators should adopt clear procedural steps.

• No penalties or enforcement procedure stated. The AD does not include specific enforcement or penalty clauses. That absence does not imply absence of enforcement under the general regulatory regime; operators should not interpret silence as flexibility. The objective compliance triggers and prohibitions provide easy audit criteria for regulators.

• Reliance on manufacturer instructions for method. The AD mandates replacement "in accordance with the instructions" in the Aviointeriors SB (Requirement 1). If the SB is ambiguous, operators may require clarification from Aviointeriors. There may be operational delays if parts or technical expertise are constrained; the AD’s exception for temporary dispatch mitigates but does not eliminate risk.

• Versions and document control. The AD references a particular revision of an SB (SB 12M/F68-01 Revision 1) for the marking test and SB 12M/F68-06 for replacement instructions. Operators must ensure they consult the correct SB revisions cited. Using an incorrect revision could lead to misapplication of the marking or replacement instructions.

• Cross-jurisdictional coordination. The AD notes EASA AD 2008-0135 refers. Operators flying internationally or operating under multiple regulators must ensure consistency between CASA’s AD and any EASA obligations; unintended divergence could cause compliance complications in different jurisdictions.

• Ambiguities and repeated text. The supplied AD contains repeated or oddly formatted lines ("Subsequent to the effective date of this Airworthiness Directive." repeated twice under Compliance). While this may be an editorial artefact, operators should seek clarification if there is uncertainty about the intended scope of those lines. Relying on a potentially editorially corrupted paragraph risks misinterpretation.

These are practical "gotchas" arising from the AD’s reliance on external SBs, marking definitions, flight-cycle accounting, conditional temporary dispensations, and precise document versioning. Address them by confirming SB content, ensuring seat histories and FC records are accurate, documenting any temporary dispatch measures, and liaising with maintenance providers and the regulator where necessary.

Compliance requires a sequence of identification, planning, technical work, documentation and operational controls, all grounded in the AD text.

1. Obtain the referenced documents.

   • Acquire Aviointeriors Service Bulletin 12M/F68-06 and consult Section 1.A to identify the specific seat assemblies that the AD applies to (Applicability).
   • Obtain Aviointeriors SB 12M/F68-01 Revision 1 to understand the marking conventions used to determine whether a backrest is "unmarked" or marked with "O" (Requirement 2).
   • Note the AD’s effective date (28 August 2008) and the compliance deadlines (Compliance).

2. Identify affected seats in your fleet.

   • Cross-reference seat part numbers in your inventory with the SB 12M/F68-06 Section 1.A list to determine which seats are affected (Applicability).
   • For each identified seat assembly, confirm the backrest P/N is 313033000000 and/or 313033100000 and inspect the marking status per SB 12M/F68-01 Rev 1 to determine if it is unmarked or marked "O" (Requirement 2).

3. Establish flight-cycle baselines.

   • Determine, for each affected seat, the total flight cycles since the seat’s first installation on an aircraft (Compliance). If records are incomplete, investigate maintenance logs, installation records and aircraft logs to reconstruct first-installation dates and cycle accrual.
   • Compare accumulated FC against the 13 000 FC threshold to determine which seats must be replaced immediately and which are subject to the alternate deadlines.

4. Create a replacement plan.

   • For seats below 13 000 FC, schedule replacement before the seat reaches 13 000 FC or no later than 31 January 2009, whichever occurs first (Compliance).
   • For seats already exceeding 13 000 FC at the AD effective date, schedule replacement within 500 FC after the effective date or by 31 January 2009, whichever occurs first (Compliance).
   • Coordinate with maintenance organisations to ensure availability of replacement parts and qualified technicians. Follow the instructions in Aviointeriors SB 12M/F68-06 for the replacement procedure (Requirement 1).

5. Arrange parts procurement and inventory controls.

   • Prevent installation of prohibited backrests by adjusting procurement and inventory procedures. Screen incoming and existing stocks for P/N 313033000000 and 313033100000 and for marking status per SB 12M/F68-01 Rev 1 (Requirement 2).

6. Document work and compliance.

   • For each seat replaced, record the replacement in aircraft maintenance records, noting that the replacement was done to comply with AD/SEATS/28 Amdt 1 and cite SB 12M/F68-06 as the method. Document seat serial numbers, removed part numbers, installation dates and certifying technician(s).
   • If using the temporary dispatch provision, document the placarding and the measures taken to ensure the seat remains unoccupied, and verify that the seat does not block an emergency exit or restrict access to the main aisle (Requirement 3).

7. Use the temporary dispatch exception only when necessary and with controls.

   • If replacement cannot be completed within the required compliance time, apply the AD’s conditional permission to dispatch with the affected seat in place only if: the seat is placarded "Do not occupy" and active measures are taken to keep it unoccupied; the seat does not block any emergency exit; and the seat does not restrict access to the main aisle (Requirement 3). Implement checklists and crew briefings to ensure these conditions are enforced each flight until replacement.

8. Liaise with your regulator and manufacturer if there is uncertainty.

   • If SB instructions are unclear, parts are unavailable, or FC records are ambiguous, consult Aviointeriors and the Civil Aviation Safety Authority (noting the delegate signature and effective date in the AD) for clarification or guidance. The AD references EASA AD 2008-0135, which may be relevant for operators governed by multiple authorities (Requirement note).

9. Maintain audit-ready records.

   • Because the AD sets objective deadlines tied to flight cycles and a calendar date, regulators can easily audit compliance. Preserve documentation showing identification of affected seats, FC calculations, replacement actions and any use of the temporary dispatch exception.

10. Review process for recurring risk mitigation.

• Since the AD arises from failure reports of recline actuator metal fittings with tool marks and from manufacturer-identified life limitations, incorporate seat inspection and lifecycle tracking into your ongoing maintenance programme to avoid recurrence and to pre-empt future ADs on seat components (Background).

Follow the AD’s exact wording: replace "in accordance with" Aviointeriors SB 12M/F68-06, do not install prohibited backrests "being either unmarked or marked with 'O' as per Aviointeriors SB 12M/F68-01 Revision 1", and adhere to the flight-cycle and date deadlines specified (Applicability; Requirement; Compliance). Document each step to demonstrate regulatory compliance.