{"id":"F2008L03720","name":"AD/PA-24/36 Amdt 1 - Fin Forward Spar Attachment - Inspection","slug":"ad-pa-24-36-amdt-1-fin-forward-spar-attachment-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":75445,"registerId":"commonwealth-F2008L03720-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Piper PA-24 (Comanche) Series Aeroplanes","sectionType":"division","heading":"Piper PA-24 (Comanche) Series Aeroplanes","content":"### Piper PA-24 (Comanche) Series Aeroplanes\n\n| AD/PA-24/36 Amdt 1 | Fin Forward Spar Attachment - Inspection | 11/2008 |\n| ------------------ | ---------------------------------------- | ------- |\n\n| Applicability: | All models Piper PA-24, PA-24-250, PA-24-260 and PA-24-400 certificated in all categories.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | 1. Inspect the fin forward spar to fuselage attachment assembly where the channel Part No. 20749-0 and the straps Part Nos. 20749-5 and -6 are riveted together. Inspect the bend relief holes in the channel. If the holes have rough edges, polish the edges to remove the roughness.2. With the aid of a magnifying glass of at least five power, visually inspect for cracks in the channel and the two straps in the area of the channel bend relief holes.Note 1: The Part Numbers quoted above do not appear in the Parts Catalogue as they are components of the fin front spar which is listed as a complete assembly under a separate Part Number.Note 2: FAA AD 75-12-06 refers. |\n| Compliance:    | 1. At the next scheduled inspection for issue of a maintenance release after the effectivity date of this Amendment.2. At each scheduled inspection for issue of a maintenance release.Note 3: Compliance with this AD at its original issue constitutes compliance with Requirement 2 of this amendment.                                                                                                                                                                                                                                                                                                                                                                                   |\n|                | This Amendment becomes effective on 23 October 2008.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |\n| Background:    | The original issue of this AD in 1975 was based on FAA AD 75-12-06, amendment 39-2227, although it omitted mention of polishing rough edges of the bend relief holes in the channel; and once-only dye penetrant inspection.                                                                                                                                                                                                                                                                                                                                                                                                                                                                |\n\n|     | Amendment 1 introduces a once-only inspection for, and rectification of, rough edges in the bend relief holes. It also specifies the compliance period in terms of the maintenance release inspection instead of hours time in service. The FAA AD is also identified. |\n| --- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n8 September 2008","sortOrder":0},{"sectionNumber":"AD/PA-24/36 Amdt 1","sectionType":"part","heading":"AD/PA-24/36 Amdt 1","content":"## AD/PA-24/36 Amdt 1","sortOrder":1},{"sectionNumber":"Fin Forward Spar Attachment - Inspection","sectionType":"part","heading":"Fin Forward Spar Attachment - Inspection","content":"## Fin Forward Spar Attachment - Inspection","sortOrder":2},{"sectionNumber":"11/2008","sectionType":"part","heading":"11/2008","content":"## 11/2008","sortOrder":3}],"analysis":{"flash_summary_failed":{"failed":true,"reason":"A positive credit balance is required for all requests, including BYOK, so fallback providers remain available. Add credits at https://vercel.com/d?to=%2F%5Bteam%5D%2F%7E%2Fai%3Fmodal%3Dtop-up to continue.","source":"analysis-cron"},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"Yes. Amendment 1 adds a once‑only inspection and rectification requirement to polish rough edges at the channel bend‑relief holes and requires magnified visual crack inspections (Requirement). It also changes the compliance metric from hours time‑in‑service to the 'next scheduled inspection for issue of a maintenance release' and thereafter at each scheduled maintenance release (Amendment note; Compliance). The amendment therefore alters both the tasks required and the timing of compliance, and it explicitly identifies the related FAA AD (Background; Requirement)."},"complexity_factors":["Narrow, equipment‑specific applicability: applies only to Piper PA‑24, PA‑24‑250, PA‑24‑260 and PA‑24‑400 models (Applicability).","Simple physical tasks: inspection with a ≥5× magnifying glass and polishing rough edges are low‑skill interventions (Requirement).","Mixed one‑off and recurring obligations: introduces a once‑only rectification plus recurring inspection at each maintenance‑release (Requirement; Compliance).","Compliance timing metric changed from hours time‑in‑service to 'next scheduled inspection for issue of a maintenance release', requiring maintenance planning changes (Amendment note; Compliance).","Parts identification ambiguity: quoted component part numbers do not appear separately in the Parts Catalogue and are listed only as a complete assembly, which may complicate locating or ordering specific components (Note 1).","Cross‑reference to FAA AD 75‑12‑06 may require operators to consult foreign AD text for background or related actions (Requirement; Background)."],"plain_english_summary":"Amendment 1 requires owners and maintenance organisations of all Piper PA‑24 (Comanche) variants to inspect the fin forward‑spar attachment where the channel and two straps are riveted, polish any rough edges at the channel bend‑relief holes, and carry out a magnified visual check for cracks. It shifts compliance timing to the next scheduled maintenance‑release inspection and adds a once‑only rectification step, so it changes when and how routine maintenance actions must be done."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This amendment stays within the original scope of the 1975 directive. It adds a missing polishing requirement and clarifies inspection timing, but does not expand beyond the original safety purpose of inspecting the fin forward spar attachment for cracks."},"complexity_factors":["Very short document (approximately 300 words)","Only 3 defined part numbers referenced","Single technical requirement with two sub-tasks (visual inspection + polishing)","Simple compliance schedule (next inspection, then recurring)","Minimal cross-referencing (one reference to FAA AD 75-12-06)","No nested exceptions or conditional logic"],"plain_english_summary":"This AD requires owners and maintainers of Piper PA‑24 Comanche aircraft to inspect the fin forward spar attachment for rough edges and cracks, polish any rough hole edges smooth, and use at least 5× magnification to check metal straps and channel for cracks. \n\nInspections begin at the next scheduled maintenance and repeat at each subsequent check. The amendment corrects a 1975 omission by adding the polishing requirement to prevent tail‑structure failure."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-24-36-amdt-1-fin-forward-spar-attachment-inspection","history":"/api/acts/ad-pa-24-36-amdt-1-fin-forward-spar-attachment-inspection/history","analysis":"/api/acts/ad-pa-24-36-amdt-1-fin-forward-spar-attachment-inspection/analysis","conflicts":"/api/acts/ad-pa-24-36-amdt-1-fin-forward-spar-attachment-inspection/conflicts","importantCases":"/api/acts/ad-pa-24-36-amdt-1-fin-forward-spar-attachment-inspection/important-cases","documents":"/api/acts/ad-pa-24-36-amdt-1-fin-forward-spar-attachment-inspection/documents"}}