{"id":"F2009L00465","name":"AD/PA-36/18 Amdt 1 - Wing Main Spar Carry Through Assembly - Inspection","slug":"ad-pa-36-18-amdt-1-wing-main-spar-carry-through-assembly-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":77019,"registerId":"commonwealth-F2009L00465-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Piper PA-36 (Pawnee Brave) Series Aeropl","sectionType":"division","heading":"Piper PA-36 (Pawnee Brave) Series Aeroplanes","content":"### Piper PA-36 (Pawnee Brave) Series Aeroplanes\n\n| AD/PA-36/18 Amdt 1 | Wing Main Spar Carry ThroughAssembly - Inspection | 3/2009 |\n| ------------------ | ------------------------------------------------- | ------ |\n\n| Applicability: | Model PA-36-285 with serial numbers 36-736001 to 36-7560003 except aircraft incorporating wing spar carry-through assembly Piper Part No. 76824-02.                                                                                                                                                                                         |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Inspect the wing spar carry-through assembly Piper Part No. 97370-00 in accordance with the “Instructions Section - Paragraph A” of Piper SB No. 552 or equivalent.If damage is observed, repair in accordance with the “Instructions Section - Paragraph B” of Piper SB No. 552 or equivalent.Note: USA AD 79-01-03 (amdt 39-3383) refers. |\n| Compliance:    | At intervals not exceeding 100 hours time in service.Compliance with the original issue of this AD constitutes compliance with this Amendment.                                                                                                                                                                                              |\n|                | This Amendment becomes effective on 12 March 2009.                                                                                                                                                                                                                                                                                          |\n| Background:    | The original issue of this AD in 1977 mentioned only Piper Part No. 97370-0.Amendment 1 excludes aircraft incorporating Piper Part No. 76824-02, and identifies USA AD 79-01-03.                                                                                                                                                            |\n\n![](image.001.png)  \nDavid Punshon  \nDelegate of the Civil Aviation Safety Authority\n\n8 January 2009","sortOrder":0},{"sectionNumber":"AD/PA-36/18 Amdt 1","sectionType":"part","heading":"AD/PA-36/18 Amdt 1","content":"## AD/PA-36/18 Amdt 1","sortOrder":1},{"sectionNumber":"Wing Main Spar Carry ThroughAssembly - I","sectionType":"part","heading":"Wing Main Spar Carry ThroughAssembly - Inspection","content":"## Wing Main Spar Carry Through  \nAssembly - Inspection","sortOrder":2},{"sectionNumber":"3/2009","sectionType":"part","heading":"3/2009","content":"## 3/2009","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"Amendment 1 narrows the AD's applicability by excluding aircraft incorporating Piper Part No. 76824-02 and explicitly identifies USA AD 79-01-03; the original 1977 issue referred only to Piper Part No. 97370-0 (Background; Applicability)."},"complexity_factors":["Narrow applicability by serial number and specific part number increases administrative burden to verify eligibility (Applicability).","Mandatory recurring inspection interval — 100 hours time in service — creates an ongoing maintenance cost and scheduling requirement for operators (Compliance).","Repairs must follow Piper SB No. 552 or an 'equivalent' method, creating potential ambiguity about acceptable alternatives and requiring technical judgement by maintainers (Requirement).","Exclusion of aircraft with Piper Part No. 76824-02 narrows scope compared with original AD, requiring operators to confirm installed parts (Applicability; Background).","Cross-reference to USA AD 79-01-03 links this instrument to overseas regulatory material that may affect interpretation (Requirement; Background).","Enforcement is the responsibility of CASA as the issuing authority, signalled by the delegate signature, so compliance is compulsory for Australian operators (Delegate of the Civil Aviation Safety Authority)."],"plain_english_summary":"Requires owners/operators of specific Piper PA-36-285 serial numbers to inspect the wing main spar carry‑through assembly (Piper Part No. 97370-00) every 100 flight hours and to repair any damage per Piper Service Bulletin No. 552 or equivalent. Aircraft fitted with Piper Part No. 76824-02 are excluded. This places inspection and repair costs and scheduling obligations on operators, is enforced by the Civil Aviation Safety Authority, and relies on following the cited service instructions and the referenced USA AD 79-01-03."},"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"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This amendment narrows rather than expands the original scope. The 1977 original applied more broadly; Amendment 1 specifically excludes aircraft with the improved part (76824-02) installed. This is a refinement to reduce unnecessary regulatory burden on operators who have already upgraded their aircraft, not a scope creep."},"complexity_factors":["Single, specific applicability criterion based on aircraft model, serial number range, and part number exclusion","Straightforward inspection requirement referencing external technical document (Piper Service Bulletin 552)","Simple compliance interval (100 hours time in service)","Minimal conditional logic (only one exception: aircraft with upgraded part 76824-02 are exempt)","Short document with no defined terms section, no cross-references to other legislation, and no nested exceptions"],"plain_english_summary":"This CASA Airworthiness Directive mandates regular inspections (every 100 flight hours) of the wing main spar carry‑through assembly on specified Piper PA‑36‑285 Pawnee Brave aircraft (serials 36‑736001 to 36‑7560003), unless the improved Piper part 76824‑02 is fitted. It’s aimed at owners/operators to prevent catastrophic wing separation; the 2009 amendment narrows scope by excluding upgraded parts and aligns with the equivalent US AD — prior compliance with the 1977 AD remains valid."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-36-18-amdt-1-wing-main-spar-carry-through-assembly-inspection","history":"/api/acts/ad-pa-36-18-amdt-1-wing-main-spar-carry-through-assembly-inspection/history","analysis":"/api/acts/ad-pa-36-18-amdt-1-wing-main-spar-carry-through-assembly-inspection/analysis","conflicts":"/api/acts/ad-pa-36-18-amdt-1-wing-main-spar-carry-through-assembly-inspection/conflicts","importantCases":"/api/acts/ad-pa-36-18-amdt-1-wing-main-spar-carry-through-assembly-inspection/important-cases","documents":"/api/acts/ad-pa-36-18-amdt-1-wing-main-spar-carry-through-assembly-inspection/documents"}}