{"id":"F2008L04425","name":"AD/PA-38/16 Amdt 2 - Main Landing Gear Attach Bolts - Modification","slug":"ad-pa-38-16-amdt-2-main-landing-gear-attach-bolts-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":76414,"registerId":"commonwealth-F2008L04425-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Piper PA-38 (Tomahawk) Series Aeroplanes","sectionType":"division","heading":"Piper PA-38 (Tomahawk) Series Aeroplanes","content":"### Piper PA-38 (Tomahawk) Series Aeroplanes\n\n| AD/PA-38/16 Amdt 2 | Main Landing Gear Attach Bolts - Modification | 13/2008 |\n| ------------------ | --------------------------------------------- | ------- |\n\n| Applicability: | Model PA-38-112, all serial numbers.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |\n| Requirement:   | Modify the main landing gear system in accordance with Piper Service Bulletin No. 673B dated 2 October 1986.Note: USA AD 90-19-03 refers.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |\n| Compliance:    | At the first scheduled maintenance event for the issue of a maintenance release after the effective date of this AD, determine whether the Main Landing Gear Bolt Replacement Kit is installed. If this Kit is not installed, inspect the saddle clamps to determine whether they are forged or welded.At the second scheduled maintenance event for the issue of a maintenance release after the effective date of this AD, ensure the appropriate Main Landing Gear Bolt Replacement Kit is installed.Note: For aircraft with forged saddle clamps the appropriate kit is Piper P/N765-171; and for aircraft with welded saddle clamps the appropriate kit is 765-172. |\n|                | This Amendment becomes effective on 18 December 2008.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |\n| Background:    | This AD was originally issued in 1980 to mandate Piper SB No. 673.Amendment 1 was issued in 1982 to mandate Piper SB No. 673A.This amendment is issued to mandate Piper SB No. 673B and to align with USA FAA AD 90-19-03.                                                                                                                                                                                                                                                                                                                                                                                                                                               |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n5 November 2008","sortOrder":0},{"sectionNumber":"AD/PA-38/16 Amdt 2","sectionType":"part","heading":"AD/PA-38/16 Amdt 2","content":"## AD/PA-38/16 Amdt 2","sortOrder":1},{"sectionNumber":"Main Landing Gear Attach Bolts - Modific","sectionType":"part","heading":"Main Landing Gear Attach Bolts - Modification","content":"## Main Landing Gear Attach Bolts - Modification","sortOrder":2},{"sectionNumber":"13/2008","sectionType":"part","heading":"13/2008","content":"## 13/2008","sortOrder":3}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This amendment maintains the original scope of the 1980 directive. It simply updates the mandated service bulletin reference from 673A to 673B and aligns with the corresponding US FAA directive. The core purpose — requiring main landing gear bolt modifications for safety — remains unchanged since original issuance."},"complexity_factors":["Short, single-purpose directive with one primary requirement","Only 2 defined part numbers (765-171 and 765-172) referenced in notes","Simple two-stage compliance schedule (first check, then install)","Single cross-reference to US FAA AD 90-19-03 and Piper Service Bulletin 673B","Clear applicability limited to one specific aircraft model","No nested exceptions or conditional logic beyond the forged/welded clamp distinction"],"plain_english_summary":"This mandatory CASA Airworthiness Directive requires owners/operators of Piper PA-38-112 Tomahawk aircraft (and their maintenance engineers) to check and, if needed, install the correct main landing gear bolt replacement kit at the next scheduled maintenance after 18 Dec 2008. \n\nThe work—determined by the type of saddle clamp fitted—prevents bolt failure and possible gear detachment, aligns with FAA AD 90-19-03, and is required for legal flight."},"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":3,"scope_assessment":{"changed":true,"description":"This amendment replaces earlier mandates (Piper SB No. 673 and 673A) by mandating Piper SB No. 673B and aligning the domestic AD with USA FAA AD 90-19-03, thereby updating the required service bulletin and the specified replacement kits and procedures."},"complexity_factors":["Two-stage compliance tied to the timing of scheduled maintenance releases (first and second maintenance events after the effective date)","Different replacement kits required depending on saddle clamp type (forged vs welded)","Dependence on an external technical document (Piper Service Bulletin No. 673B) for the modification procedure","Obligation to verify kit fitment and clamp type imposes inspection and record-checking burdens on maintenance organisations","Parts procurement and installation labour costs borne by owners/operators","Applicability to all serial numbers increases administrative scope but simplifies applicability rule","Reference to a foreign AD (USA AD 90-19-03) and prior amendments means operators must track historical and updated mandates"],"plain_english_summary":"This airworthiness directive requires all Piper PA‑38‑112 aircraft to have their main landing gear modified per Piper Service Bulletin No. 673B. At the first maintenance release after 18 December 2008 operators must check whether the Main Landing Gear Bolt Replacement Kit is fitted and whether the saddle clamps are forged or welded; by the second maintenance release they must install the correct kit (P/N 765‑171 for forged, 765‑172 for welded). The regulator says the amendment updates earlier requirements and aligns with USA FAA AD 90‑19‑03; owners/operators pay inspection, parts and labour and must schedule the work into maintenance releases."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-38-16-amdt-2-main-landing-gear-attach-bolts-modification","history":"/api/acts/ad-pa-38-16-amdt-2-main-landing-gear-attach-bolts-modification/history","analysis":"/api/acts/ad-pa-38-16-amdt-2-main-landing-gear-attach-bolts-modification/analysis","conflicts":"/api/acts/ad-pa-38-16-amdt-2-main-landing-gear-attach-bolts-modification/conflicts","importantCases":"/api/acts/ad-pa-38-16-amdt-2-main-landing-gear-attach-bolts-modification/important-cases","documents":"/api/acts/ad-pa-38-16-amdt-2-main-landing-gear-attach-bolts-modification/documents"}}