{"id":"F2008L02957","name":"AD/CESSNA 400/115 - Engine Mounts","slug":"ad-cessna-400-115-engine-mounts","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":74917,"registerId":"commonwealth-F2008L02957-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Cessna 400 Series Aeroplanes","sectionType":"division","heading":"Cessna 400 Series Aeroplanes","content":"### Cessna 400 Series Aeroplanes\n\n| AD/CESSNA 400/115 | Engine Mounts | 9/2008 |\n| ----------------- | ------------- | ------ |\n\n| Applicability: | Model 401 and 402 series aircraft, and Model 414 aircraft, which have been modified in accordance with Supplemental Type Certificates SA2424WE or SA117NW; incorporating Allison turboprop engines.                                                                                                                                                |\n| -------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Action in accordance with the technical requirements of FAA AD 76-16-07 Amdt39-2694.Note: Engine mounts modified in accordance with American Jet Industries Service Bulletin 400-1 dated 7 June 1976, or later FAA approved revision, constitutes terminating action to the modification and repetitive inspection requirements of this Directive. |\n| Compliance:    | As specified in the Requirement document, with a revised effective date of28 August 2008.                                                                                                                                                                                                                                                          |\n|                | This Airworthiness Directive becomes effective on 28 August 2008.                                                                                                                                                                                                                                                                                  |\n| Background:    | The FAA requires certain actions to detect and correct possible failures of the engine attachment tangs of part number PN5002 engine mounts. This Directive is issued to ensure compliance of future imported aircraft.                                                                                                                            |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n14 July 2008","sortOrder":0},{"sectionNumber":"AD/CESSNA 400/115","sectionType":"part","heading":"AD/CESSNA 400/115","content":"## AD/CESSNA 400/115","sortOrder":1},{"sectionNumber":"Engine Mounts","sectionType":"part","heading":"Engine Mounts","content":"## Engine Mounts","sortOrder":2},{"sectionNumber":"9/2008","sectionType":"part","heading":"9/2008","content":"## 9/2008","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"No. The directive adopts the FAA AD requirements for the specified modified Cessna models to ensure imported aircraft meet the same inspection and corrective-action standard, consistent with the directive’s stated purpose (Background; Requirement). It does not expand applicability beyond the stated models/STCs or add new mandated actions beyond those referenced."},"complexity_factors":["Cross-reference to an existing FAA AD (FAA AD 76-16-07) rather than standalone technical requirements (Requirement).","Limited applicability tied to specific aircraft models and two Supplemental Type Certificates (Applicability).","Presence of a single, defined terminating action (installation per AJI Service Bulletin 400-1) which affects ongoing inspection burden (Requirement note).","Clear compliance deadline and altered effective date (Compliance).","Technical subject matter requires specialised inspection of engine‑mount attachment tangs (Background; Requirement).","Scope focused on future imported aircraft compliance monitoring rather than broad domestic fleet regulation (Background)."],"plain_english_summary":"Requires inspections and corrective action on engine mounts of Cessna Model 401 and 402, and Model 414 aircraft modified under STCs SA2424WE or SA117NW and fitted with Allison turboprop engines, following the technical actions in FAA AD 76-16-07. Installing modified mounts per American Jet Industries Service Bulletin 400-1 removes the need for further repetitive inspections. The directive targets detection and correction of failures of PN5002 engine‑mount attachment tangs and imposes the compliance obligation on owners/operators by 28 August 2008."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard Airworthiness Directive adopting an existing FAA directive. The scope remains precisely targeted at the specific safety issue (engine mount failures) and specific aircraft population (modified Cessna 400 series). No scope creep is evident."},"complexity_factors":["Very short document (approximately 200 words)","Only 2 defined technical references (FAA AD 76-16-07 Amdt39-2694 and Service Bulletin 400-1)","Simple conditional logic: applies only to specific aircraft models with specific modifications","Single compliance pathway with one terminating action option","No nested exceptions or cross-references to other legislation","Clear applicability criteria using specific model numbers and part numbers"],"plain_english_summary":"This AD mandates inspection and corrective action on engine mounts for Cessna 401/402/414 aircraft fitted with Allison turboprop conversions under specified STCs, after discovery of potential failure of PN5002 engine mount tangs that could allow engine separation. It affects owners, operators and maintainers of those modified aircraft in Australia and mirrors FAA AD 76-16-07. Compliance began 28 August 2008; installing the American Jet Industries modification per SB 400-1 (or later approved revision) ends the repetitive inspections."},"flash_summary_failed":{"failed":true,"reason":"Unauthenticated. Configure AI_GATEWAY_API_KEY or use a provider module. Learn more: https://ai-sdk.dev/unauthenticated-ai-gateway","source":"analysis-cron"}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-400-115-engine-mounts","history":"/api/acts/ad-cessna-400-115-engine-mounts/history","analysis":"/api/acts/ad-cessna-400-115-engine-mounts/analysis","conflicts":"/api/acts/ad-cessna-400-115-engine-mounts/conflicts","importantCases":"/api/acts/ad-cessna-400-115-engine-mounts/important-cases","documents":"/api/acts/ad-cessna-400-115-engine-mounts/documents"}}