{"id":"F2008L03719","name":"AD/PA-24/32 Amdt 2 - Stabilator Attachment Bolts - Inspection","slug":"ad-pa-24-32-amdt-2-stabilator-attachment-bolts-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":75443,"registerId":"commonwealth-F2008L03719-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Piper PA-24 (Comanche) Series Aeroplanes","sectionType":"division","heading":"Piper PA-24 (Comanche) Series Aeroplanes","content":"### Piper PA-24 (Comanche) Series Aeroplanes\n\n| AD/PA-24/32 Amdt 2 | Stabilator Attachment Bolts - Inspection | 11/2008 |\n| ------------------ | ---------------------------------------- | ------- |\n\n| Applicability: | All models Piper PA-24, PA-24-250 and PA-24-260 with serial numbers from 24-1 to 24-5047; and PA-24-400 with serial numbers from 26-2 to 26-148 if the four stabilator attachment bolts are not made of corrosion-resistant steel.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |\n| -------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Remove the four stabilator attachment bolts and inspect for corrosion in accordance with Piper SL No. 667A.If corrosion is found, before further flight replace the bolt, nut and washer with unused parts of the same part numbers or equivalent. Alternatively, the bolts can be replaced by equivalent corrosion-resistant AN bolts.Note 1: Parts numbered 502329 and 502342 are corrosion-resistant bolts.Note 2: FAA AD 74-13-03 refers.                                                                                                                                                                                                                                                                                                                                                                                      |\n| Compliance:    | 1. If the four stabilator attachment bolts have not previously been inspected for corrosion in accordance with this AD, Piper SL No. 667A, or FAA AD 74-13-03, before further flight after 31 October 2008.Note 3: Piper PA-24-400 aircraft by serial number are included for the first time at Amendment 2. Stabilator attachment bolts in these aircraft might not be corrosion-resistant steel.2. If the four stabilator attachment bolts have previously been inspected in accordance with any of the instructions specified at 1. above, at intervals not exceeding three years or five hundred hours time in service, whichever occurs first. Alternatively, the bolts can be replaced by equivalent corrosion-resistant AN bolts.Note 4: Compliance with this AD at amendment 1 constitutes compliance with this amendment. |\n|                | This Amendment becomes effective on 23 October 2008.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |\n\n| Background: | The original issue of this AD in January 1974 specified replacement of stabilator attachment bolts within 100 hours after 31 January 1974, based on Piper SL No. 667.Amendment 1 in March 1974 specified inspection at 3 monthly intervals as an alternative to replacement, due to difficulties with supply of suitable corrosion-resistant bolts. In March 1974 Piper issued SL No. 667A to authorise, as an alternative to corrosion-resistant bolts, new steel alloy bolts with repetitive inspections at intervals not to exceed 500 hours in service.In June 1974 the FAA issued AD 74-13-03 (amdt 39-1872) specifying inspection at intervals not to exceed 3 years or 500 hours, whichever occured first, as an alternative to replacement. AD 74-13-03 nominated Piper SL No. 667A.Amendment 2 is raised to add the applicable serial number range for Piper PA-24-400 aircraft; to align the inspection interval with FAA AD 74-13-03; to identify the FAA AD on which AD/PA-24/32 is now based; and to add Piper SL No. 667A as the instructions for inspecting steel alloy bolts. |\n| ----------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n10 September 2008","sortOrder":0},{"sectionNumber":"AD/PA-24/32 Amdt 2","sectionType":"part","heading":"AD/PA-24/32 Amdt 2","content":"## AD/PA-24/32 Amdt 2","sortOrder":1},{"sectionNumber":"Stabilator Attachment Bolts - Inspection","sectionType":"part","heading":"Stabilator Attachment Bolts - Inspection","content":"## Stabilator Attachment Bolts - Inspection","sortOrder":2},{"sectionNumber":"11/2008","sectionType":"part","heading":"11/2008","content":"## 11/2008","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"Amendment 2 expanded the AD's applicability to include PA‑24‑400 serial numbers, incorporated Piper SL No. 667A as the inspection instruction for steel alloy bolts, and aligned the recurrent inspection interval with FAA AD 74‑13‑03 (3 years or 500 flight hours). It also explicitly cites the FAA AD as the basis for this AD (Background/Compliance)."},"complexity_factors":["Cross-references to external documents: Piper SL No. 667A and FAA AD 74-13-03 (Requirement/Background).","Serial-number-specific applicability, including newly added PA‑24‑400 ranges (Applicability/Background).","Two compliance pathways: repetitive inspection per SL No. 667A or replacement with corrosion‑resistant AN bolts (Requirement/Compliance).","Recurring compliance interval defined as 'not exceeding three years or 500 hours, whichever occurs first' (Compliance).","Grandfathering: prior compliance under earlier versions counts as compliance with this amendment (Compliance).","Identification of specific part numbers noted as corrosion‑resistant (Notes in Requirement), which affects replacement choices."],"plain_english_summary":"Amendment 2 requires owners/operators of specified Piper PA‑24 series aeroplanes (listed serial ranges) whose stabilator attachment bolts are not corrosion‑resistant to remove and inspect the four stabilator attachment bolts per Piper Service Letter No. 667A, and to replace corroded bolts or fit corrosion‑resistant equivalents before further flight. It adds PA‑24‑400 serials and aligns the inspection interval with the FAA standard (every 3 years or 500 flight hours), creating a recurrent inspection or replacement obligation that operators must meet and pay for."},"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":3,"scope_assessment":{"changed":true,"description":"Originally issued in 1974 requiring bolt replacement only, the AD has expanded to include: (1) repetitive inspection intervals as an alternative to replacement, (2) alignment with FAA standards, (3) addition of PA-24-400 aircraft series at Amendment 2, and (4) multiple compliance pathways. The scope has broadened from a one-time replacement mandate to a comprehensive ongoing inspection regime with alternatives."},"complexity_factors":["Multiple serial number ranges and aircraft models in applicability section","Conditional compliance paths based on prior inspection history (two distinct compliance tracks)","Cross-reference to external documents: Piper Service Letter No. 667A and FAA AD 74-13-03","Alternative compliance methods (inspection vs. replacement with corrosion-resistant bolts)","Amendment history requires understanding of superseded requirements"],"plain_english_summary":"This CASA Airworthiness Directive mandates inspection of the four stabilator attachment bolts on specified Piper PA-24 series aircraft for corrosion. If corrosion is found, bolts must be replaced before further flight; alternatively, installing corrosion‑resistant bolts removes the need for ongoing inspections.\n\nIt affects owners/operators of listed PA-24, PA-24-250, PA-24-260 and PA-24-400 aircraft with non‑corrosion‑resistant bolts and prevents potential stabilator failure and loss of control."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-24-32-amdt-2-stabilator-attachment-bolts-inspection","history":"/api/acts/ad-pa-24-32-amdt-2-stabilator-attachment-bolts-inspection/history","analysis":"/api/acts/ad-pa-24-32-amdt-2-stabilator-attachment-bolts-inspection/analysis","conflicts":"/api/acts/ad-pa-24-32-amdt-2-stabilator-attachment-bolts-inspection/conflicts","importantCases":"/api/acts/ad-pa-24-32-amdt-2-stabilator-attachment-bolts-inspection/important-cases","documents":"/api/acts/ad-pa-24-32-amdt-2-stabilator-attachment-bolts-inspection/documents"}}