{"id":"F2006B05886","name":"AD/PA-34/15 - Outer Wing Spars - Inspection","slug":"ad-pa-34-15-outer-wing-spars-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":135934,"registerId":"commonwealth-F2006B05886-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-34/15 - Outer Wing Spars - Inspection","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-34 (Seneca) Series Aeroplanes\n\nAD/PA-34/15 Outer Wing Spars \\- Inspection 9/74\n\nApplicability: All models PA34-200 with S/Nos. 34-7450001 to 34-7450205.\n\nRequirement: 1. To detect improperly formed lightening holes in the outer wing spars, accomplish the following:\n\n    (a) Remove the inspection plate located adjacent to the aileron bellcrank and aft of the outboard fuel tank on the lower surface of the wing.\n\n    (b) Inspect both sides of LH and RH spar around the first lightening hole outboard of the fish mouth of the main spar splice for evidence of a die stamping mark approximately six by six inches square surrounding the lightening hole area.\n\n    (c) Inspect the lightening hole flange radius for cracks.\n\n    2. If square die stamping mark is evident on the aft side of spar only and there are no cracks in the lightening hole flange radii, no further action is required.\n\n    3. If square die stamping mark is evident on forward side of spar and/or if there are cracks in the lightening hole flange, replace the outboard spar with a serviceable spar of the same P/N or repair in accordance with a scheme approved by the Secretary.\n\nCompliance: Within 10 hours time in service after 17 September 1974.","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2025},"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive maintains a precise, surgical scope focused exclusively on detecting a specific manufacturing defect in a limited production run. It does not expand beyond its original safety purpose of identifying improperly formed lightening holes in outer wing spars."},"complexity_factors":["Technical aviation terminology requiring specialist knowledge (e.g., 'lightening holes', 'fish mouth', 'die stamping marks', 'aileron bellcrank')","Bifurcated conditional logic creating two distinct compliance pathways based on inspection findings","Narrow applicability restricted to specific serial number range (205 aircraft)","Reference to external approval mechanism (repairs require 'scheme approved by the Secretary')"],"plain_english_summary":"This safety directive targets specific Piper PA-34 Seneca aircraft (serial numbers 34-7450001 to 34-7450205) to prevent catastrophic wing failure. **The problem:** Some aircraft were built with improperly manufactured holes in the outer wing spars (the structural beams inside the wings), which could develop cracks and compromise wing integrity. **What must happen:** A mechanic must remove an inspection panel on each wing and check for specific square manufacturing marks and cracks around these holes. **The outcomes:**\n- **If** the mark appears only on the back side of the spar **and** no cracks exist → the aircraft passes inspection.\n- **If** the mark appears on the front side **or** any cracks are found → the spar must be replaced with an approved part or repaired using a method approved by the Civil Aviation Safety Authority.\n\nOperators had to complete this inspection within 10 hours of flight time after 17 September 1974."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-34-15-outer-wing-spars-inspection","history":"/api/acts/ad-pa-34-15-outer-wing-spars-inspection/history","analysis":"/api/acts/ad-pa-34-15-outer-wing-spars-inspection/analysis","conflicts":"/api/acts/ad-pa-34-15-outer-wing-spars-inspection/conflicts","importantCases":"/api/acts/ad-pa-34-15-outer-wing-spars-inspection/important-cases","documents":"/api/acts/ad-pa-34-15-outer-wing-spars-inspection/documents"}}