AD/F406/11 Amdt 1 - Fuselage to Centre Wing Connection

The AD organises its requirements around a small set of core concepts that determine scope, action and timing. Those concepts are explicit in the instrument and are reproduced or referenced below.

Applicability. The directive limits its scope to a defined subset of the F406 fleet: "Model F406 series aircraft, serial numbers 001 through 089, and 091." The text thereby excludes all other serial numbers and models from the directive as written.

Mandatory reference to a Service Bulletin / Requirement document. The AD does not set out the technical inspection steps within the text. Instead it mandates performance "in accordance with Reims Aviation Industries Service Bulletin Service (SB) No. F406-54 Revision 1, dated 9 November 2004." The AD also notes a related airworthiness directive from DGAC (French Directorate General for Civil Aviation), "DGAC AD F-2004-114 R1," as a point of reference.

Two-tiered compliance logic. The AD distinguishes two scenarios and links each to a different timing trigger:

• Scenario A: The inspection required by the original Requirement document has not been accomplished as at the effective date of the original directive. For these aircraft, the inspection must be accomplished "at the next scheduled 600 hour or 12 month inspection after 7 August 2004, whichever occurs first."
• Scenario B: The original inspection was already performed as at the effective date, but the specific "Modification Kit DDK406-026 material changes specified in Revision 1 of the Requirement document were not incorporated at the time of compliance." For these aircraft, the changes must be incorporated "at the next scheduled 600 hour or 12 month inspection after 17 March 2005, whichever occurs first."

Unchanged inspection compliance time. The AD emphasises that despite the amendment, "The compliance time for the inspection requirement remains unchanged by this issue." That implies the amendment modifies the Requirement document handling rather than altering the underlying inspection interval previously established in the original directive.

Safety driver and remedial objective. The Background explicitly identifies the safety problem and the objective of the required action. The problem is localized structural cracking: "Cracks have been discovered on the left and right ribs at the centre wing to fuselage connection at fuselage station FS160.80." The risk is specified: "Propagation of undetected rib cracks could result in structural failure." The remedial measure is both inspection and modification: "Modification action is necessary to facilitate access for the required inspection." Thus the main concept is detection and mitigation of a specific structural cracking risk at FS160.80 by improved access and inspection.

Regulatory provenance and effective date. The instrument is an amendment (Amdt 1) issued by the Civil Aviation Safety Authority (CASA), signed by a delegate, and "becomes effective on 17 March 2005." It also expressly ties its issuance to a revision of a related DGAC AD, stating "Amendment 1 is issued in response to a revision of the related DGAC AD, which introduces a revised Requirement document." The linkage to DGAC signals cross-jurisdictional regulatory coordination in technical requirements.

Document interaction. The AD instructs compliance with a manufacturer's Service Bulletin and a referenced Requirement document, and cross-references the DGAC AD. The AD therefore functions as an enforcement mechanism that imports external documents into the regulator's mandatory framework rather than reproducing technical content itself.

The AD identifies the affected aircraft by model and serial number and thereby defines the set of stakeholders obliged to comply. The text explicitly states applicability to "Model F406 series aircraft, serial numbers 001 through 089, and 091." By naming serial numbers, the instrument confines its reach to a finite subset of the F406 fleet.

Primary parties bearing operational obligations. The AD itself does not name individuals or companies; however the operative requirements target the aircraft listed and therefore apply to the persons or entities that operate, maintain or have operational control of those aircraft. The directive requires specific maintenance actions "in accordance with Reims Aviation Industries Service Bulletin ... F406-54 Revision 1," and directs that modification kit material changes "DDK406-026" be incorporated where appropriate. Those actions will fall on whoever is responsible for accomplishing the maintenance and airworthiness tasks for the affected serial-numbered aircraft, in practice the aircraft operator, owner or contracted maintenance organisation.

Regulatory authorities. The directive is issued by the Civil Aviation Safety Authority. The signature block shows: "David Punshon, Delegate of the Civil Aviation Safety Authority." The AD also links to a foreign authority document, "DGAC AD F-2004-114 R1," indicating interaction with the French authority that issued the corresponding AD. The instrument therefore sits in the space where a domestic regulator enforces technical instructions that track a foreign airworthiness directive and manufacturer service bulletin.

Parts suppliers and manufacturers. The AD refers to a specific modification kit, "Modification Kit DDK406-026," and a manufacturer service bulletin. These references indicate relevant roles for Reims Aviation Industries and any supplier of parts or kits required for the modification. The AD requires that "Modification Kit DDK406-026 material changes specified in Revision 1 of the Requirement document" be incorporated where prior compliance lacked those changes; that implies suppliers or the manufacturer hold responsibility for providing the modification kit and associated instructions.

Maintenance providers. The AD mandates that an inspection be performed "at the next scheduled 600 hour or 12 month inspection" determined by each aircraft's maintenance schedule. Those tasks will be performed by licensed maintenance personnel or organisations capable of performing the inspection and any required modifications, using the Service Bulletin and any parts specified.

Excluded parties. Aircraft not within the serial number list are not addressed by this AD. For example serial number 090 is not listed in "001 through 089, and 091." The AD therefore does not, on its face, apply to aircraft outside that numbered set.

Financial bearers and insurers. The AD text does not mention finance, insurance or cost allocation. It sets mandatory technical actions without prescribing who pays. The directive therefore creates compliance obligations for the parties responsible for the aircraft without specifying reimbursement, cost-sharing or compensation.

Information holders. The AD requires actors to consult and act in accordance with the specified Service Bulletin and the related DGAC AD. That means that holders of those documents, such as operators, maintenance organisations and the manufacturer, must ensure document access and correct interpretation.

The AD sets out narrow but concrete duties around inspection and incorporation of a specific modification. It does not grant affirmative rights such as compensation or appeals within its own text. The key duties and the limited textual statements about rights or unchanged requirements are as follows.

Mandatory duty to act according to a Service Bulletin. The AD's operative requirement is "Action in accordance with Reims Aviation Industries Service Bulletin Service (SB) No. F406-54 Revision 1, dated 9 November 2004." That imposes a duty on the responsible parties for affected aircraft to follow the methods, inspections and any rectification steps contained in that Service Bulletin and the associated Requirement document.

Timing obligations tied to scheduled maintenance intervals. The AD requires operators to schedule the inspection or modification to coincide with the next scheduled 600 hour or 12 month inspection, subject to the two-scenario structure:

• Where the original inspection has not been accomplished by the effective date of the original directive, the required inspection must be completed "at the next scheduled 600 hour or 12 month inspection after 7 August 2004, whichever occurs first."
• Where the original inspection had been completed but the Revision 1 "Modification Kit DDK406-026 material changes" were not incorporated at that time, the required incorporation must be completed "at the next scheduled 600 hour or 12 month inspection after 17 March 2005, whichever occurs first."

No change to inspection compliance time. The AD expressly states "The compliance time for the inspection requirement remains unchanged by this issue." Thus the amendment does not alter the base inspection interval prescribed previously; rather it alters the point at which specific modification kit changes are to be incorporated when prior compliance lacked them.

Duty to incorporate specific modification kit material changes. The AD identifies "Modification Kit DDK406-026 material changes specified in Revision 1 of the Requirement document" as mandatory where they were not incorporated at the time of original compliance. That creates a duty to retrofit or incorporate the specified changes at the next scheduled interval for affected aircraft.

Duty to consult related regulatory and manufacturer documents. The AD explicitly refers to the Service Bulletin and DGAC AD F-2004-114 R1. That prescribes a duty to consult external documents, as the AD does not reproduce the technical content itself.

No express rights for deferment or exemptions. The AD text contains no procedural mechanism within it for seeking an exemption, alternative inspection method, or deferred compliance. The directive is framed as a mandatory amendment with specified compliance triggers. Any rights to apply for alternative compliance or exemptions would have to be sought under the broader regulatory framework for airworthiness directives, but those mechanisms are not described in this text.

No penalties or enforcement procedures stated. The AD does not include any sanctions, civil penalties, or enforcement processes within its wording. It provides the requirement, effective date and technical references, but does not set out enforcement measures in this document.

No allocation of costs or funding. The AD does not specify who must pay for inspections, parts or modification kits, nor does it provide for reimbursement or compensation. The requirement is to accomplish the technical actions specified and to do so at prescribed maintenance intervals.

Record-keeping duties implicit. While the AD does not set out record-keeping provisions, the nature of the requirement (inspection at scheduled intervals and incorporation of modifications) presupposes that operators must record completion to demonstrate compliance. The AD does not detail the form, retention or submission of such records.

The text of AD/F406/11 Amdt 1 does not set out any penalties, infringements, or enforcement procedures within the document itself. The directive consists of applicability, technical requirement references, compliance timing, effective date and background. It provides no statutory penalty schedules or enforcement mechanics.

Regulator and signature. The AD is issued under the authority of the Civil Aviation Safety Authority, as shown by the signature block, "David Punshon, Delegate of the Civil Aviation Safety Authority" and dated "4 February 2005." While the AD itself does not spell out enforcement steps, its issuance by CASA places it within CASA's broader regulatory remit and enforcement powers under the governing aviation law. Any penalties or enforcement action would therefore arise from the enabling legislation or regulatory enforcement framework that empowers CASA to ensure compliance with airworthiness directives. Those enabling provisions and any penalty mechanisms are not reproduced or referenced in the AD text provided.

No express notification or escalation process. The AD contains no procedural provisions describing how CASA will verify compliance, the process for reporting completed inspections or modifications, or the consequences of non-compliance. The instrument also does not specify whether operators must notify CASA upon completion, nor does it provide forms or reporting times.

No administrative review or appeal mechanism is stated. The AD does not describe a process for seeking an exemption, alternative compliance method, or extension. It focuses on the technical requirement and timing for compliance.

Link to foreign AD. The AD references "DGAC AD F-2004-114 R1," but does not state whether enforcement is coordinated with the DGAC or whether compliance with the DGAC AD would be treated as compliance with the CASA AD. The AD notes that Amendment 1 is issued in response to a revision of the related DGAC AD, which introduces a revised Requirement document, but does not set out enforcement consequences stemming from that linkage.

Implication for operators. Given the absence of penalties or enforcement protocols in the AD text, operators must infer that failure to undertake the mandated inspections and modifications would leave them non-compliant with an enforceable CASA instrument. The AD itself leaves the specific enforcement steps and penalties unspecified and therefore any enforcement consequences would be sourced to the regulator’s enabling statutes and enforcement instruments, which are not included in this AD.

The AD explicitly imports and interacts with external documents and regulatory instruments rather than creating a stand-alone technical regime. The text shows two clear channels of interaction.

Reference to the manufacturer's Service Bulletin and Requirement document. The AD requires action "in accordance with Reims Aviation Industries Service Bulletin Service (SB) No. F406-54 Revision 1, dated 9 November 2004." That means the AD operates by making compliance with a manufacturer-issued Service Bulletin mandatory under the regulator's directive. The Service Bulletin and its associated Requirement document contain the technical measures to be applied; the AD enforces them by applying them to the specified serial-numbered aircraft.

Cross-reference to a foreign airworthiness directive. The AD contains the notation "Note: DGAC AD F-2004-114 R1 refers." The Background also states: "Amendment 1 is issued in response to a revision of the related DGAC AD, which introduces a revised Requirement document." This shows coordination between CASA and the DGAC (French authority). The AD therefore interacts with foreign regulatory action. The AD imports or tracks a revision made by the DGAC and aligns domestic regulatory obligation with the revised foreign Requirement document.

Interaction with maintenance schedules. The AD ties its compliance triggers to the standard maintenance intervals of the aircraft: "the next scheduled 600 hour or 12 month inspection." Thus the AD interfaces with maintenance rule sets and operator maintenance schedules, making the Service Bulletin actions part of the aircraft’s scheduled maintenance regime.

No explicit interaction with other statutory provisions included in this text. The AD does not cite the specific statutory powers under which CASA issued the directive, does not reference civil aviation legislation, and does not reproduce enforcement or appeal mechanisms. Consequently, the AD must be read in the context of the broader legal framework that empowers CASA to issue airworthiness directives and to enforce compliance. Those enabling provisions are not provided here.

No conflict resolution provisions. The AD does not include provisions resolving potential conflicts between the Service Bulletin and other regulatory requirements, nor does it provide a mechanism for approval of alternative methods of compliance. Any such interactions would have to be resolved under CASA’s broader regulatory processes and the enabling legislation, which are outside this text.

Supply chain interaction. By mandating incorporation of "Modification Kit DDK406-026 material changes specified in Revision 1 of the Requirement document," the AD interacts with the parts supply chain and manufacturer responsibilities for kit availability and conformity to the Requirement document. The AD does not, however, set lead times, availability requirements or priorities for kits.

Implicit operational and contractual interactions. Making a manufacturer Service Bulletin mandatory affects contracts between operators and maintenance organisations, and between operators and manufacturers, because actions previously issued as guidance become regulatory obligations. The AD does not specify contractual consequences, but it creates a legal overlay forcing parties who rely on the Service Bulletin to prioritise and schedule the required actions within the stated maintenance windows.

The instrument is presented as an amendment to an existing AD. The document header shows "AD/F406/11 Amdt 1" and several repeated headings that confirm the amendment status and the subject matter. The text provides the following amendment history points.

Original directive and effective date references. The compliance text refers to "the original issue of the Requirement document" and to actions to be taken "as at the effective date of this Directive" and "after 7 August 2004." Those references indicate that there was an original AD or Requirement document with an effective date around 7 August 2004. The amendment text does not reproduce the original AD but modifies its application by aligning the revised Requirement document and the revised Service Bulletin.

Date and issuance of Amendment 1. The AD contains the line "This Amendment becomes effective on 17 March 2005." The signature block is dated "4 February 2005." That places the amendment’s issuance prior to its effective date and records the formal signing by the CASA delegate.

Reason for the amendment. The Background explains why Amendment 1 was issued: "Amendment 1 is issued in response to a revision of the related DGAC AD, which introduces a revised Requirement document." In other words, the amendment synchronises the CASA AD with a revision made by the DGAC, and the amendment incorporates that revised Requirement document by reference.

Revision to the Requirement document. The AD requires compliance with "Reims Aviation Industries Service Bulletin Service (SB) No. F406-54 Revision 1, dated 9 November 2004." The amendment therefore recognizes or adopts Revision 1 of the SB/Requirement document as the operative technical standard.

Modification kit incorporation timing. The amendment introduces or clarifies the requirement to incorporate "Modification Kit DDK406-026 material changes specified in Revision 1 of the Requirement document" where those changes were not present at the time of original compliance. The amendment sets the timing for incorporation at the next scheduled 600 hour or 12 month inspection after 17 March 2005.

Retention of original inspection compliance time. The amendment explicitly states "The compliance time for the inspection requirement remains unchanged by this issue." That indicates the amendment is surgical: it does not alter the original inspection interval, but adjusts how the revised Requirement document and modification kit changes are to be handled.

Document provenance and sign-off. The AD includes the delegate’s name and position, "David Punshon, Delegate of the Civil Aviation Safety Authority," and the date of signature, "4 February 2005," which documents the internal administrative steps of the amendment’s adoption.

No other historical amendments recorded in the provided text. The document shows only "Amdt 1," indicating this is the first amendment to AD/F406/11. There are no further amendment entries, rescissions or supersessions recorded in this text. Any later amendments or prior original AD text are not included and must be sought separately.

The provided text contains no litigation history, court decisions, or references to judicial reviews. It names no cases and records no disputes, appeals or enforcement actions. The instrument is a regulatory administrative directive and the text is limited to technical applicability, mandatory reference to a Service Bulletin, compliance timing, an effective date and a safety background.

Absence of case law in the text. Because the AD does not include any litigation references, readers must not infer the existence of judicial decisions from this document alone. The AD makes no statements about any prior or subsequent litigation relating to the cracks discovered at fuselage station FS160.80 or to compliance with the Service Bulletin or modification kit.

Enforcement and adjudication outside the AD. Any disputes about the AD’s validity, enforcement, or compliance would be resolved under the broader legal framework that governs CASA and airworthiness directives. Those adjudicative processes and any associated case law are not reproduced here and therefore cannot be stated as part of this instrument.

Directional references only. The AD refers to a related DGAC AD and to a Reims Aviation Industries Service Bulletin. Those references do not include any litigation materials. The AD’s Background identifies a safety problem but does not mention remedial litigation, inspections revealed in legal proceedings, or enforcement litigation.

If a reader requires litigation history or precedents concerning this AD, the text does not supply them, and external legal research would be necessary. This AD, as presented, contains no litigation record.

The AD contains a number of potential pitfalls for practitioners because of its drafting choices, cross-references and timing mechanics. These are matters that non-obvious readers and compliance officers should note carefully and verify against the referenced documents.

Serial-number scope gaps. The Applicability section lists "Model F406 series aircraft, serial numbers 001 through 089, and 091." The list thereby omits serial number 090. A reader should not assume that 090 is included by implication. The AD’s textual scope is explicit and limited; aircraft owners and operators must check serial numbers precisely to determine applicability.

Two-step conditional compliance scheduling. The compliance paragraph uses a two-scenario approach with different date anchors:

• One anchor is "after 7 August 2004" for aircraft to which the original inspection requirement has not yet been accomplished as at the effective date of the original directive.
• A second anchor is "after 17 March 2005" for incorporation of Modification Kit DDK406-026 material changes for aircraft that had already undergone the original inspection but lacked those material changes at the time. These dual date anchors can be confusing. Practitioners must determine whether the aircraft had been inspected "as at the effective date of the original issue" and whether the modification kit material changes were incorporated "at the time of compliance." Errors of fact about the inspection status as of the original effective date will determine which timing rule applies.

Dependence on external documents for technical content. The AD requires action "in accordance with Reims Aviation Industries Service Bulletin ... F406-54 Revision 1, dated 9 November 2004," and refers to a related DGAC AD. The AD itself does not reproduce the technical inspection process, acceptance criteria, or modification details. Compliance therefore requires obtaining and following the referenced Service Bulletin and the revised Requirement document. Failure to obtain those documents or to apply the correct revision (Revision 1 dated 9 November 2004) risks non-compliance.

Material-change specificity. The AD singles out "Modification Kit DDK406-026 material changes specified in Revision 1 of the Requirement document." The use of the phrase "material changes" suggests that Revision 1 introduced substantive differences in the modification kit or instructions compared to the original. Operators who previously performed the inspection without incorporating DDK406-026 must now ensure that the Revision 1 material changes are incorporated. Determining whether prior work included the material changes may require reviewing maintenance records, kit serial numbers, or invoice/parts evidence.

Retention of original inspection timing. The AD states "The compliance time for the inspection requirement remains unchanged by this issue." That means the amendment does not lengthen or shorten the original inspection interval. Practitioners must consult the original Requirement document or original AD to confirm what that underlying inspection compliance time was. The AD alone does not state the original inspection interval beyond referring to "the next scheduled 600 hour or 12 month inspection" in the timing rules.

Ambiguity on who funds parts and labour. The AD does not specify cost allocation. It mandates actions but contains no provisions for reimbursement, government-funded modification, or warranty claims. Affected parties must be aware that the directive itself does not allocate costs and should plan accordingly.

No enforcement language in the AD. The AD contains no explicit penalties or enforcement processes. Practitioners should not treat the absence of enforcement prose as indicating absence of legal consequence. Enforcement and penalty mechanisms exist in the broader regulatory framework under which CASA operates, but that framework is not reproduced in this AD.

Interplay with DGAC AD. The AD responds to a revision of the DGAC AD. Operators should confirm whether compliance with the DGAC AD or with the referenced Requirement document is sufficient evidence of compliance under CASA, and whether any differences remain between the versions. The AD’s solitary note "DGAC AD F-2004-114 R1 refers" does not settle the administrative or technical relationship; practitioners should verify the precise interplay.

Record-proof issues. The AD presumes operators can determine whether an inspection "has been accomplished as at the effective date of the original issue." For older maintenance records, missing or ambiguous records could complicate determining which compliance path applies. Operators should audit maintenance history to avoid misapplication of the timing rules.

The AD prescribes specific, document-linked steps and timing triggers. Below are the concrete actions that the text requires or implies, and the practical verifications an operator or maintenance organisation should perform to demonstrate compliance with the directive as written.

1. Confirm aircraft applicability.

• Verify whether the aircraft is a Model F406 series aeroplane and whether its serial number is included in the applicability range: "001 through 089, and 091."
• If the aircraft’s serial number is not in that set, this AD does not apply as written.

2. Obtain and review the referenced documents.

• Acquire Reims Aviation Industries Service Bulletin No. F406-54 Revision 1, dated 9 November 2004, and the associated Requirement document referred to in the AD.
• Obtain a copy of the related DGAC AD F-2004-114 R1 for cross-reference because the AD notes that the amendment responds to a revision of that DGAC AD.

3. Determine the aircraft’s compliance history as at the effective date of the original directive.

• Ascertain whether the inspection required by the original Requirement document "has been accomplished as at the effective date of the original issue." The AD’s later timing depends on that factual determination.
• Review maintenance logs, sign-offs, and parts records to determine whether the inspection was done before the original effective date and whether the work incorporated any modification kit material changes.

4. Follow the timing rules in the AD.

• If the original inspection had not been accomplished as at the original effective date: schedule and perform the inspection "at the next scheduled 600 hour or 12 month inspection after 7 August 2004, whichever occurs first." The AD states this timing requirement verbatim.
• If the original inspection had been accomplished as at the original effective date, but "Modification Kit DDK406-026 material changes specified in Revision 1 of the Requirement document were not incorporated at the time of compliance," then incorporate those material changes "at the next scheduled 600 hour or 12 month inspection after 17 March 2005, whichever occurs first."

5. Perform inspections and modifications strictly in accordance with the Service Bulletin.

• Execute the inspection procedures and any rectification steps exactly as set out in SB No. F406-54 Revision 1 and the Requirement document referenced therein. The AD mandates action "in accordance with" that revision.

6. Retain evidence of compliance.

• Although the AD does not specify reporting or record formats, maintain clear maintenance records showing the date of inspection, the scheduled maintenance interval under which the work was performed (600 hour or 12 month), the Service Bulletin revision applied, parts and modification kits installed (including DDK406-026 where relevant), and signatures of authorised maintenance personnel.
• Document whether the material changes in Revision 1 were incorporated or were present at an earlier compliance action.

7. Confirm effective dates and subsequent obligations.

• Note that "This Amendment becomes effective on 17 March 2005." Ensure any incorporation work tied to the 17 March 2005 anchor is scheduled accordingly.
• Be aware that "The compliance time for the inspection requirement remains unchanged by this issue." If in doubt about the original inspection compliance time, consult the original Requirement document or original AD to avoid mis-scheduling.

8. Coordinate with parts suppliers and the manufacturer.

• If the required action includes incorporation of "Modification Kit DDK406-026 material changes," ensure availability of the kit and that the parts meet the Revision 1 specification. Confirm part numbers and revision levels with the supplier or Reims Aviation Industries.

9. Engage qualified maintenance organisations.

• Schedule the inspection and any modification work to be performed by appropriately certificated maintenance personnel or an approved maintenance organisation capable of following the Service Bulletin and installing the modification kit.

10. Seek clarification from the regulator if necessary.

• The AD itself contains no penalty, enforcement or exemption procedures and does not set out alternative means of compliance. Where there is uncertainty about how the AD’s timing anchors apply to a given aircraft, how to interpret what constitutes the "material changes" in Revision 1, or how to evidence compliance, engage CASA or an authorised delegate to obtain clarification. The AD records CASA’s delegate as the signatory but does not include procedural contacts or forms.

11. Audit affected aircraft records.

• Because the applicability and the timing rules depend on whether the original inspection had been accomplished and whether material changes were incorporated "at the time of compliance," audit and reconcile maintenance logs, kit installation records and invoices to produce a defensible record establishing which compliance path applies.

12. Keep cross-referenced documents available for inspection.

• Retain copies of Reims Aviation Industries SB No. F406-54 Revision 1, the related Requirement document, and DGAC AD F-2004-114 R1 as part of the aircraft’s compliance file. The AD does not reproduce technical detail and compliance officers or inspectors will need to see the referenced documents to verify applied procedures.

Following the steps above aligns with the AD’s express language: mandatory action "in accordance with" the specified Service Bulletin, with compliance timing determined by the inspection history and the two date anchors cited in the AD. The AD imposes technical obligations without specifying enforcement procedures or cost allocation; therefore practical compliance requires not only performing the technical tasks but also documenting them clearly to evidence adherence to the CASA directive.