AD/TBM 700/49 - Emergency Landing Gear By-pass Selector Inspection

The AD explicitly affects owners and operators of EADS Socata TBM 700 N (TBM 850) aircraft bearing the serial numbers listed in the Applicability clause: 364, 367 and 370 to 435 inclusive. That is a defined group of airframes rather than an open class. The aircraft operators named by the AD are the parties obliged to arrange inspections and modifications, because the Requirement commands physical work on the aeroplane.

Maintenance organisations and engineers carrying out inspections and modifications are operationally implicated, because the AD requires compliance “in accordance with” specified paragraphs of EADS Socata SB 70‑154‑53, which set out the technical steps to be performed. The AD also implicitly affects any maintenance centres to which an operator might ferry an aeroplane under the single permitted ferry flight, because those centres will perform the modification or inspection described.

Regulatory actors are implicated in that the AD is issued under the authority of the Civil Aviation Safety Authority (CASA), signed by the Delegate of CASA (David Villiers), and refers to an EASA AD and a manufacturer Service Bulletin as its technical references. The AD text does not name insurers, but operators may involve insurers in arranging maintenance; the AD does not address insurance consequences.

Practically, parties who "pay" are the operators or owners who must procure the inspection and any modification work, and the maintenance organisations that will incur labour and parts costs when they perform the work. The AD does not allocate costs or provide financial assistance; it prescribes technical compliance.

Finally, the AD affects flight operations to the extent it requires actions that must be completed before flight or by set inspection dates and to the extent it restricts immediate operation by permitting only a single ferry flight with landing gear extended to reach a maintenance facility, as specified in § B of the Accomplishment Instructions of the referenced Service Bulletin.

Duties

• Inspect or modify the floor panel in accordance with the Accomplishment Instructions of EADS Socata SB 70‑154‑53. The AD identifies two operative duties: (1) where the panel has been removed or removal cannot be ruled out, check the gap between the landing gear control button and the floor panel per paragraph A of the SB and, if insufficient, modify per § C; (2) where the panel has not been removed, modify per § C. These are set out in the Requirement section of the AD.
• Observe compliance timing. The Compliance section sets two deadlines: the inspection/modification must be done “before next flight after the effective date of this AD” in one circumstance, and “at next scheduled inspection after the effective date of this AD, but not later than 31 May 2009” in the other. The AD’s effective date is 29 April 2008.
• If required to relocate the aircraft to a maintenance facility, limit operation to the single ferry flight allowance, with landing gear extended, as specified in § B of the SB.

Rights or allowances

• A single ferry flight with landing gear extended is expressly permitted to reach a maintenance centre where the required inspection/modification can be accomplished. The AD expressly references § B of the Accomplishment Instructions of SB 70‑154‑53 for the conditions of that ferry flight.
• The AD delegates technical method to the manufacturer’s Service Bulletin; compliance means following the SB paragraphs A and C (and B for the ferry allowance). That gives operators a defined technical path to meet regulatory requirements: perform the checks/modifications as described in SB 70‑154‑53.

What the AD does not state

• The AD text does not specify inspection intervals beyond the immediate deadlines, it does not specify continuing airworthiness obligations other than the actions required, and it does not provide a means for alternative methods of compliance within the text. The AD also does not state penalties, waivers, or an appeals process. Those matters are not addressed in the AD as supplied.

Practical interpretation of duties

• For records and maintenance provenance, the Requirement’s distinction based on whether the panel has been removed or whether that fact can be determined places an evidentiary duty on operators: they must know or establish maintenance history to avoid unnecessary duplication of work. Where history is unclear, the text requires inspection and possibly modification to ensure compliance.

The AD as provided does not contain express penalty provisions or set out enforcement procedures. It states that the Airworthiness Directive becomes effective on 29 April 2008 and is signed by the Delegate of the Civil Aviation Safety Authority. The AD specifies mandatory actions and compliance timing, but it does not itself enumerate sanctions for non‑compliance within the document text supplied.

Given the absence of expressed penalties in the AD text, the AD nonetheless functions as a regulatory instrument imposing mandatory technical obligations on the named fleet subset. Enforcement and penalties would therefore arise from the regulatory framework under which CASA issues ADs; however, the AD document supplied does not detail those enforcement mechanisms or penalty amounts, nor does it specify the administrative process for exemptions or alternative means of compliance.

The AD does, functionally, create immediate non‑delegable duties for operators of the listed aircraft because it requires inspection or modification “before next flight” or by the next scheduled inspection but no later than 31 May 2009, as applicable. Failure to comply with such mandatory AD requirements typically has operational consequences, for example an aircraft may be considered not airworthy until the AD is complied with. The AD text itself, though, contains no explicit statement to that effect; readers must treat the enforcement dimension as outside the AD’s text, since no penalty or enforcement clause is included in the supplied document.

The AD explicitly incorporates and references other regulatory and technical materials. It states “Note 1: EASA AD 2008‑0081‑E and EADS Socata Service Bulletin 70‑154‑53 refers.” This means the AD is linked to:

• EASA AD 2008‑0081‑E: the AD references this European Aviation Safety Agency AD as related material. The supply of that EASA AD is part of the technical/legal context the CASA AD relies on.
• EADS Socata Service Bulletin 70‑154‑53: the CASA AD makes compliance with specific paragraphs (A, B, C) of this Service Bulletin the method of satisfying the AD’s requirements.

The AD thus operates by importing manufacturer and foreign regulatory technical material into an Australian regulatory requirement. The AD does not, within its text, describe conflicts or interactions with other Australian statutes or regulations. It does not mention alternative means of compliance, exemptions, or the process for amending the AD, nor does it cite particular provisions of Acts or Civil Aviation Regulations in the supplied text. Therefore, based solely on the AD content, interaction is limited to the cross‑reference to EASA material and the manufacturer Service Bulletin as the normative technical mechanism.

Operationally, the AD constrains airworthiness determinations for the affected serial numbers by requiring the inspection or modification described. The AD’s requirement to follow SB 70‑154‑53 makes that Service Bulletin an effective normative instrument for the purposes of this AD. Any party administering other airworthiness processes for these aeroplanes will need to read the SB material and the EASA AD to understand the full technical prescription the CASA AD imports.

Because the supplied AD does not address enforcement mechanisms, or whether compliance with the SB also satisfies other regulatory reporting or records requirements, practitioners should be aware that the AD is a stand‑alone directive in this text that relies on the referenced documents for technical detail. The AD’s references create a direct dependency: compliance means complying with the specified parts of the Service Bulletin and, implicitly, taking account of the EASA AD.

The AD document as provided contains a single effective date and no listed amendments. It states:

• “This Airworthiness Directive becomes effective on 29 April 2008.” The signature block shows the document was signed on 28 April 2008 by David Villiers, Delegate of the Civil Aviation Safety Authority.

No subsequent amendments, revocations, superseding ADs, or corrigenda are included in the supplied text. No version history is printed on the document excerpt. The AD does refer to EASA AD 2008‑0081‑E and EADS Socata SB 70‑154‑53 as referenced material, but the supplied AD does not indicate whether it is an initial issue or a revision of an earlier CASA AD.

Where the AD requires compliance “before next flight” or “not later than 31 May 2009,” those dates and deadlines are part of the original disposition and not presented as amended timing. If one needs to know whether this AD has been superseded, revised, or withdrawn after the effective date, that information is not contained in the supplied instrument and would have to be sought from CASA’s AD records or official publications. The document itself does not record any amendment history.

The supplied AD contains no litigation history. It includes neither references to administrative appeals nor records of judicial review, enforcement proceedings, or disputes arising from the AD. The text is limited to the operative technical requirements, applicability, compliance timing and the background safety rationale.

Accordingly, there is no litigation history recorded within this AD document. Any legal challenges, enforcement actions, or disputes that may have arisen after issuance are not reflected in the supplied text and cannot be inferred from it. For an accurate litigation history, interested parties would need to consult external legal databases, CASA enforcement records, or court registries, none of which are part of the AD as provided.

Several practical and interpretative issues arise directly from the AD text that operators, maintainers and compliance officers must note:

• Narrow applicability, precise serial numbers. The AD applies only to EADS Socata TBM 700 N (TBM 850) aircraft with serial numbers 364, 367 and 370 to 435 inclusive. This is a non‑continuous listing (it omits 365-366, 368-369, for example). Careful record checks are required to confirm whether an individual airframe falls within the listed serial numbers. Misidentifying serial numbers could lead to unnecessary work or to non‑compliance.
• Evidentiary burden about panel removal. The Requirement differentiates obligations based on whether the affected floor panel has been removed during maintenance, and it expressly includes aircraft “for which it cannot be determined that any such removal did not occur.” That phrasing shifts the burden to operators and maintainers to establish maintenance history. If maintenance records do not show whether the panel was removed, the AD treats that as a state requiring inspection. Practically, poor record‑keeping will tend to increase the number of aircraft requiring immediate inspection or modification.
• Two alternative immediate timeframes. The Compliance section sets two discrete deadlines: (1) in some cases the action is required “before next flight after the effective date of this AD,” which is a very short, immediate deadline; (2) in other cases the action is required “at next scheduled inspection after the effective date of this AD, but not later than 31 May 2009,” which allows some breathing room. Operators must correctly determine which deadline applies to each airframe, based on the factual maintenance history.
• Mandatory modification for panels not removed. If the affected floor panel has not been removed during maintenance, the AD still requires modification in accordance with § C. This means that absence of panel removal does not eliminate the need to perform the modification; it may simply avoid the initial gap check step in paragraph A.
• Technical method is in the Service Bulletin. The AD does not reproduce the technical details, it requires compliance with specified paragraphs (A, B, C) of EADS Socata SB 70‑154‑53. Operators therefore must obtain and follow that Service Bulletin. The AD also references EASA AD 2008‑0081‑E. Not possessing the SB or misunderstanding which SB paragraphs to follow would frustrate compliance.
• Limited ferry relief. The AD allows a single ferry flight with the landing gear extended as specified in § B of the SB. The ferry is conditioned on the SB paragraph and limited to a single flight to reach a maintenance centre where the action can be accomplished. Operators requiring relocation of the aeroplane must ensure the ferry flight strictly complies with the SB conditions; the AD does not provide more flexible operational relief.
• No penalty or enforcement detail in the AD. The AD supplies mandatory requirements and deadlines but does not set out enforcement procedures or penalties. Operators should not interpret silence as permissive; rather, the AD imposes mandatory technical duties, and compliance records will be necessary to demonstrate adherence in any subsequent regulatory interaction.
• Time between issue and effective date. The AD was signed on 28 April 2008 and becomes effective the following day, 29 April 2008. The very short run‑up between signing and effective date means operators had limited time to mobilise resources to comply, especially where actions were required “before next flight.”
• Potential parts or access costs. The AD requires modification of a floor panel per § C of the SB. While the AD does not detail required parts or labour, modifications to internal panels can require parts procurement and scheduled maintenance access. The AD places the logistical and cost burden on operators and maintenance organisations, who must arrange and pay for the necessary work.

These are not speculative points; they are direct consequences of the language and structure of the AD as supplied.

The AD specifies the path to compliance by reference to EADS Socata Service Bulletin 70‑154‑53 and by setting explicit deadlines and a ferry flight allowance. A compliant operational plan based strictly on the AD text would include the following steps:

1. Identify affected airframes by serial number. Confirm whether each aircraft in the operator’s fleet is within the list: serial numbers 364, 367 and 370 to 435 inclusive. The AD’s Applicability clause is the starting point for all compliance work.

2. Establish maintenance history for the affected floor panel. Determine whether the specific floor panel referenced in SB 70‑154‑53 has been removed during any maintenance activity. The Requirement draws a line depending on whether removal has occurred, or whether removal cannot be ruled out. Document the result in the airframe maintenance records.

3. For aircraft where panel removal occurred, or removal cannot be determined:

   • Obtain and follow paragraph A of the Accomplishment Instructions of EADS Socata SB 70‑154‑53 to check the gap between the landing gear control button and the floor panel.
   • If the gap is found insufficient, perform the modification in accordance with § C of the Accomplishment Instructions of SB 70‑154‑53.
   • Record the inspection results and any modification work in the aircraft maintenance log, citing SB 70‑154‑53 paragraph A and § C as the compliance reference.

4. For aircraft where the panel has not been removed:

   • Proceed directly to modify the floor panel per § C of the Accomplishment Instructions of SB 70‑154‑53.
   • Record the work in the maintenance log, citing SB 70‑154‑53 § C as the compliance reference.

5. Observe the compliance timing:

   • If the AD’s “before next flight after the effective date” threshold applies (as set out in the Compliance section), ensure the inspection/modification is completed prior to any further flights beyond the effective date of 29 April 2008.
   • If the AD allows deferment to “next scheduled inspection, but not later than 31 May 2009,” schedule the work at the next inspection but ensure it is completed on or before 31 May 2009.

6. If the aircraft cannot reach a maintenance facility without flying, use the ferry provision:

   • As specified in § B of the Accomplishment Instructions of SB 70‑154‑53, a single ferry flight with landing gear extended is permitted to reach a maintenance centre where the inspection or modification can be accomplished. Ensure this single flight follows any conditions contained in § B of SB 70‑154‑53 and document the ferry flight purpose and compliance.

7. Liaise with an authorised maintenance organisation:

   • Because the AD requires following the Service Bulletin’s Accomplishment Instructions, engage a maintenance provider familiar with EADS Socata SB 70‑154‑53 to perform the inspection/modification. Ensure the provider records compliance with the SB paragraphs and that the maintenance release or certificate cites compliance with AD/TBM 700/49.

8. Maintain documentary evidence:

   • Keep copies of the inspection reports, maintenance entries, parts invoices (if any), and the applicable pages of EADS Socata SB 70‑154‑53 showing the paragraphs used. The AD itself references both the SB and EASA AD 2008‑0081‑E in Note 1; include references to these documents in compliance records.

9. Verify the effective date and signatory:

   • The AD becomes effective 29 April 2008 and is signed 28 April 2008 by David Villiers, Delegate of CASA. Record this AD identification (AD/TBM 700/49) and the effective date in the aircraft’s continuance of airworthiness paperwork when documenting compliance.

10. Seek clarifications if needed:

• If there is any uncertainty about the meaning of paragraph A, B or C of SB 70‑154‑53, or about the applicability to a particular serial number, obtain authoritative clarification from CASA or the manufacturer. The AD itself does not provide an alternative method of compliance within its text; any alternative approach would need to be authorised by the regulator.

Following these steps will meet the AD’s express requirements, because the AD prescribes the inspection/modification actions and links them to specific paragraphs of the manufacturer’s Service Bulletin, sets the compliance deadlines, and permits a single ferry flight under stated conditions.