{"id":"F2006B05606","name":"AD/PA-28/48 - Outer Wing Spar - Inspection","slug":"ad-pa-28-48-outer-wing-spar-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":135216,"registerId":"commonwealth-F2006B05606-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-28/48 - Outer Wing Spar - 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-28 Series Aeroplanes\n\nAD/PA-28/48 Outer Wing Spar \\- Inspection 10/74\n\nApplicability: All models PA-28-235 with S/Nos. 28-7410001 to 28-7410090\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 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":1455},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive maintains its original narrow scope targeting a specific manufacturing defect in a limited production batch of Piper PA-28-235 aircraft manufactured in 1974. No mission creep or expansion beyond the original safety purpose is evident."},"complexity_factors":["Technical aviation engineering terminology (lightening holes, fish mouth, bellcrank, spar splice)","Highly specific applicability limited to 90 aircraft by serial number range","Binary conditional logic determining compliance paths (if-then-else structure)","Reference to external administrative approval process (Secretary approval for repairs)"],"plain_english_summary":"This directive requires a one‑time safety inspection of certain Piper Cherokee PA‑28‑235 (ser. nos. 28‑7410001–28‑7410090) to find a manufacturing defect in outer wing spar lightening holes that could cause structural failure. Owners must access the inspection plate at the aileron bellcrank, check for a die‑stamp location and any cracks; if forward stamping or cracks are found the spar must be replaced or repaired under approved procedures.\n\nCompliance: within 10 flight hours after 17 Sept 1974."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-28-48-outer-wing-spar-inspection","history":"/api/acts/ad-pa-28-48-outer-wing-spar-inspection/history","analysis":"/api/acts/ad-pa-28-48-outer-wing-spar-inspection/analysis","conflicts":"/api/acts/ad-pa-28-48-outer-wing-spar-inspection/conflicts","importantCases":"/api/acts/ad-pa-28-48-outer-wing-spar-inspection/important-cases","documents":"/api/acts/ad-pa-28-48-outer-wing-spar-inspection/documents"}}