{"id":"F2009L02788","name":"AD/PA-28/40 Amdt 2 - Wing Rear Spar - Inspection","slug":"ad-pa-28-40-amdt-2-wing-rear-spar-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":79980,"registerId":"commonwealth-F2009L02788-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Piper PA-28 Series Aeroplanes","sectionType":"division","heading":"Piper PA-28 Series Aeroplanes","content":"### Piper PA-28 Series Aeroplanes\n\n| AD/PA-28/40 Amdt 2 | Wing Rear Spar - Inspection | 8/2009 |\n| ------------------ | --------------------------- | ------ |\n\n| Applicability: | All models.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |\n| -------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Visually inspect the area of the wing rear spar next to the fuselage attachment for evidence of corrosion between the rear spar P/N 62054 and plate P/N 62056 or 66762.Note: It is imperative to inspect the front face of the rear spar through the internal area of the wing after removal of the under-wing fillet or fuselage floor panels in the area of the wing rear attachments. Corrosion of the aluminium alloy spar proceeds from the inboard end and is detected by deterioration of rivet tails and pitting, bulging and cracking of the spar material.Accomplishment of Piper Service Bulletin No. 977 eliminates the repetitive inspection requirement of this directive. |\n| Compliance:    | 1. For those aircraft not inspected during the preceding 3 years - within 100 hours time in service after 16 April 1976 and there-after at intervals not exceeding 3 years.2. For all other aircraft - at intervals not exceeding 3 years.                                                                                                                                                                                                                                                                                                                                                                                                                                               |\n|                | This Amendment becomes effective on 30 July 2009.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |\n| Background:    | Local defect experience indicates that complete disintegration of the rear spar material can occur in the area of the rear spar and steel plate faying surfaces, without any external evidence of deterioration.Amendment 2 introduces Piper SB No.977 which when accomplished is terminating action for the repetitive inspections.                                                                                                                                                                                                                                                                                                                                                     |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n17 June 2009","sortOrder":0},{"sectionNumber":"AD/PA-28/40 Amdt 2","sectionType":"part","heading":"AD/PA-28/40 Amdt 2","content":"## AD/PA-28/40 Amdt 2","sortOrder":1},{"sectionNumber":"Wing Rear Spar - Inspection","sectionType":"part","heading":"Wing Rear Spar - Inspection","content":"## Wing Rear Spar - Inspection","sortOrder":2},{"sectionNumber":"8/2009","sectionType":"part","heading":"8/2009","content":"## 8/2009","sortOrder":3}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a narrow, technical maintenance directive focused on a specific airworthiness issue in a specific aircraft type. Amendment 2 actually reduces ongoing burden by adding a terminating action, rather than expanding scope."},"complexity_factors":["Single, specific mechanical task (visual inspection of one component)","Only 2 compliance pathways (initial catch-up vs ongoing schedule)","One terminating action (Piper SB 977) that ends the obligation","No defined terms section, no cross-references to other legislation","Plain language description of corrosion indicators (rivet deterioration, pitting, bulging)","Total length: approximately 200 words of substantive content"],"plain_english_summary":"This CASA Airworthiness Directive requires owners/operators of Piper PA‑28 aeroplanes to inspect the wing rear spar-to-fuselage attachment for hidden corrosion that can cause catastrophic wing failure. Inspections are mandated every 3 years (or within 100 flight hours if overdue) and may require removal of under‑wing or floor panels to view the spar. Amendment 2 adds a terminating option: completing Piper Service Bulletin No. 977 eliminates the need for repetitive inspections. This is a critical life‑safety measure."},"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":5,"scope_assessment":{"changed":true,"description":"Amendment 2 adds Piper Service Bulletin No. 977 as an approved terminating action for the repetitive inspections and formalises inspection intervals and applicability to all PA‑28 models. In effect it leaves the original inspection requirement in place but creates a one‑time modification option that ends recurring inspections once accomplished (Background/Requirement/Applicability)."},"complexity_factors":["Applicability to all PA‑28 models increases coverage and number of affected owners/operators (Applicability).","Inspection requires internal access—removal of under‑wing fillet or fuselage floor panels—raising labour/time and technical access costs (Requirement).","Corrosion is described as internal with little external evidence, making detection technically difficult and increasing reliance on thorough internal inspection (Background/Requirement).","References specific part numbers (rear spar P/N 62054; plate P/N 62056 or 66762), creating a technical matching task for maintainers (Requirement).","Dual compliance timing: initial within 100 hours TIS if not inspected in preceding 3 years, otherwise 3‑year recurrent intervals — adds scheduling/recordkeeping complexity (Compliance).","Introduces Piper Service Bulletin No. 977 as a terminating action, creating an alternative one‑off modification path versus ongoing inspections (Requirement/Background).","Repetitive inspection regime until SB is accomplished imposes continuing compliance burden and potential operational downtime (Requirement/Compliance).","Administrative elements (effective date, delegate signature) formalise enforcement timing but require operators to track the amendment's effective date (This Amendment becomes effective...)."],"plain_english_summary":"**What it does:** Requires owners/operators of all Piper PA‑28 aeroplanes to visually inspect the wing rear spar at the fuselage attachment for corrosion, accessing the spar face through the wing interior after removing under‑wing fillets or fuselage floor panels. Inspections must occur within 100 hours TIS if not inspected in the previous three years, and thereafter at intervals not exceeding three years. Completing Piper Service Bulletin No. 977 removes the repetitive inspection requirement.\n\nOwners bear inspection and access costs. The measure aims to detect hidden corrosion that can disintegrate spar material, trading recurring inspection burden for a one‑time SB modification option."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-28-40-amdt-2-wing-rear-spar-inspection","history":"/api/acts/ad-pa-28-40-amdt-2-wing-rear-spar-inspection/history","analysis":"/api/acts/ad-pa-28-40-amdt-2-wing-rear-spar-inspection/analysis","conflicts":"/api/acts/ad-pa-28-40-amdt-2-wing-rear-spar-inspection/conflicts","importantCases":"/api/acts/ad-pa-28-40-amdt-2-wing-rear-spar-inspection/important-cases","documents":"/api/acts/ad-pa-28-40-amdt-2-wing-rear-spar-inspection/documents"}}