{"id":"F2006B05569","name":"AD/PA-25/33 Amdt 2 - Wing Forward Spar - Inspection and Modification","slug":"ad-pa-25-33-amdt-2-wing-forward-spar-inspection-and-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":46568,"registerId":"commonwealth-F2006B05569-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-25/33 Amdt 2 - Wing Forward Spar - Inspection and Modification","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nPiper PA-25 (Pawnee) Series Aeroplanes\n\nAD/PA-25/33\n\nAmdt 2\n\n  \nWing Forward Spar \\- Inspection and Modification 5/76\n\nApplicability: All models PA-25-235 and PA-25-260 with S/Nos. prior to 25-7405573. Requirement: 1. Inspect the left and right wing forward spar in accordance with Piper SB 410.\n\n    2. Modify the left and right wing forward spar by fitting Piper Kit No. 760840 in accordance with Piper SB 414.\n\n    3. Inspect the inboard end of left and right forward spar which have been modified in accordance with para. 2 for cracks or signs of distress paying particular attention to the area at the outboard ends of the reinforcing plate.\n\nCompliance: For Para. 1 \\- At intervals not exceeding 300 hours time in service until modified.\n\nFor Para. 2 \\- Not later than next major inspection after 31 July 1974.\n\nFor Para. 3 \\- At intervals not exceeding 1200 hours time in service or 2 years whichever occurs first.","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2168},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This amendment maintains the original safety scope of ensuring structural integrity of wing forward spars on affected Piper PA-25 aircraft. There is no evidence of scope creep beyond the original intent of preventing wing spar failures through inspection and modification requirements."},"complexity_factors":["References external technical documents (Piper Service Bulletins 410 and 414) which must be consulted for detailed procedures","Specific applicability limited by aircraft model and serial number ranges","Conditional compliance timeline ('until modified') requiring tracking of aircraft status","Dual-unit compliance intervals (flight hours vs. calendar time) with 'whichever occurs first' logic"],"plain_english_summary":"A mandatory airworthiness directive requires owners/operators of Piper PA‑25‑235 and PA‑25‑260 aeroplanes (serials before 25‑7405573) to inspect and reinforce the wing forward spars. Operators must perform recurring inspections until a Piper reinforcement kit (Kit No. 760840, per the manufacturer’s service guidance) is installed, and then continue periodic inspections of the reinforced areas.\n\nThe rule addresses spar cracking that could lead to wing separation, imposing inspection and modification to maintain structural safety."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-25-33-amdt-2-wing-forward-spar-inspection-and-modification","history":"/api/acts/ad-pa-25-33-amdt-2-wing-forward-spar-inspection-and-modification/history","analysis":"/api/acts/ad-pa-25-33-amdt-2-wing-forward-spar-inspection-and-modification/analysis","conflicts":"/api/acts/ad-pa-25-33-amdt-2-wing-forward-spar-inspection-and-modification/conflicts","importantCases":"/api/acts/ad-pa-25-33-amdt-2-wing-forward-spar-inspection-and-modification/important-cases","documents":"/api/acts/ad-pa-25-33-amdt-2-wing-forward-spar-inspection-and-modification/documents"}}