{"id":"F2006B05692","name":"AD/PA-31/106 Amdt 2 - Fuselage Station 332.0 Bulkhead","slug":"ad-pa-31-106-amdt-2-fuselage-station-332-0-bulkhead","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":135477,"registerId":"commonwealth-F2006B05692-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-31/106 Amdt 2 - Fuselage Station 332.0 Bulkhead","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-31 Series Aeroplanes\n\nAD/PA-31/106\n\nAmdt 2\n\n  \nFuselage Station 332.0 Bulkhead 9/96\n\n| Applicability: | Models  | Serial Numbers                                                                                                                        |\n| -------------- | ------- | ------------------------------------------------------------------------------------------------------------------------------------- |\n|                | PA-31T  | 31T-7400002 through 31T-8120104                                                                                                       |\n|                | PA-31T1 | 31T-7804001 through 31T-8104101, 31T-8304003, and 31T-1104004 through 31T-1104007                                                     |\n|                | PA-31T2 | 31T-8166001 through 31T-8166032, 31T-8166034 through 31T-8166065, 31T-8166067 through 31T-8166071, and 31T-8166073through 31T-8166075 |\n|                | PA-31T3 | 31T-8275001, 31T-8275003 through 31T-8275012, 31T-8275014through 31T-8275017, 31T-8275025, and 31T-8375001 through 31T-8275005        |\n\nRequirement: 1. Inspect in accordance with the Instructions section of Piper Service Bulletin (SB) 773A.\n\n2. a. Reinforce the FS 332 bulkhead by incorporating Piper Kit 764-983 in accordance with the kit instructions, Revised 18 June 1990; or\n\nb. Replace the bulkhead assembly with a reinforced bulkhead assembly, P/N 45583-16 or P/N 45583-17, in accordance with the applicable maintenance manual.\n\nNote: FAA AD 96-10-13 Amdt 39-9620 refers.\n\nCompliance: 1. At intervals not to exceed 200 hours time in service, until Requirement 2.a. or 2.b. is accomplished.\n\n2. Unless already accomplished, within 600 hours time in service after 15 August 1996.\n\nThe repetitive compliance of the previous issue of this Directive remains unchanged. This Amendment is effective from 15 August 1996.\n\nBackground: Reports were received of cracks in the FS 332 bulkhead, which, if not detected and corrected, could result in structural failure. Amendment 1 decreased the inspection threshold and introduced a repair kit.\n\nCOMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\nAmendment 2 is issued in response to a new Country of Origin AD which requires incorporating a stabiliser forward spar attachment bulkhead reinforcement kit or installing a reinforced bulkhead assembly as terminating action for the repetitive inspection requirement. The Federal Aviation Administration's policy on ageing commuter-class aircraft is to eliminate or, in certain circumstances, reduce the number of certain repetitive short-interval inspections when improved parts or modifications are available.\n\nThe original issue of this Airworthiness Directive became effective on 16 January 1984.\n\nAmendment 1 of this Airworthiness Directive became effective on 4 June 1984.","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":5,"scope_assessment":{"changed":true,"description":"Amendment 2 adds a terminating corrective option to the existing repetitive-inspection regime: either incorporate Piper Kit 764-983 or install reinforced bulkhead assembly P/N 45583-16/17. It keeps the 200-hour inspection interval until modification and sets a 600-hour deadline (after 15 August 1996) for completing the terminating action (see 'Requirement' and 'Compliance' sections). This aligns the Directive with the referenced FAA AD."},"complexity_factors":["Technical specificity: refers to a precise structural component (FS 332 bulkhead) and aircraft serial-number applicability.","Multiple compliance paths: repetitive inspections versus two alternative terminating actions (kit installation or part replacement).","Operational scheduling: short repetitive interval (200 hours) until a terminating action is carried out, and a fixed deadline (600 hours after 15 Aug 1996).","Part and kit references: manufactures' kit number (764-983) and part numbers (45583-16, 45583-17) require coordination with maintenance/parts supply.","Inter-jurisdictional alignment: cross-reference to FAA AD 96-10-13 adds regulatory coordination and possibly differing standards.","Implementation detail reliance: compliance requires following service bulletin and kit/manufacturer instructions or maintenance manual procedures."],"plain_english_summary":"Mechanically, this Airworthiness Directive requires operators of specific Piper PA-31 series aircraft to inspect the FS 332 bulkhead every 200 flight hours until they either install Piper Kit 764-983 or replace the bulkhead with a reinforced assembly (P/N 45583-16 or -17). Those terminating modifications must be completed within 600 flight hours after 15 August 1996. It affects only the listed serial-numbered PA-31T/T1/T2/T3 aeroplanes and aims to address reported cracking that could cause structural failure."},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This Amendment 2 stays within the original scope of addressing the FS 332 bulkhead cracking issue. It does not expand to new aircraft models or new structural problems. The amendment merely provides an alternative compliance path (permanent repair) to terminate repetitive inspections, which is consistent with the original safety purpose."},"complexity_factors":["Short, single-purpose document (2 pages)","Only 4 defined model categories with specific serial number ranges","Simple two-part requirement structure (inspect vs. repair)","Clear compliance deadlines with unambiguous time-in-service calculations","Minimal cross-referencing (only references one FAA AD and one Piper Service Bulletin)","No nested exceptions or conditional logic — straightforward 'do X or Y' structure"],"plain_english_summary":"This CASA Airworthiness Directive targets Piper PA‑31 series aeroplanes with cracking found at fuselage station 332.0 (tail‑stabiliser attachment). It requires repeated inspections (every 200 flight hours) until a permanent repair is fitted, and mandates installation of a reinforced bulkhead or reinforcement kit within 600 flight hours after 15 August 1996. The change lets operators terminate repetitive inspections by fitting improved parts, addressing potential structural failure and aligning with international ageing‑aircraft safety policy."},"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"}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-31-106-amdt-2-fuselage-station-332-0-bulkhead","history":"/api/acts/ad-pa-31-106-amdt-2-fuselage-station-332-0-bulkhead/history","analysis":"/api/acts/ad-pa-31-106-amdt-2-fuselage-station-332-0-bulkhead/analysis","conflicts":"/api/acts/ad-pa-31-106-amdt-2-fuselage-station-332-0-bulkhead/conflicts","importantCases":"/api/acts/ad-pa-31-106-amdt-2-fuselage-station-332-0-bulkhead/important-cases","documents":"/api/acts/ad-pa-31-106-amdt-2-fuselage-station-332-0-bulkhead/documents"}}