{"id":"F2006B05796","name":"AD/PA-31/91 Amdt 1 - Outboard Flap Track Attachment","slug":"ad-pa-31-91-amdt-1-outboard-flap-track-attachment","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":135706,"registerId":"commonwealth-F2006B05796-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-31/91 Amdt 1 - Outboard Flap Track Attachment","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-31/91\n\nAmdt 1\n\n  \nOutboard Flap Track Attachment 2/81\n\nApplicability: All models PA-31 & PA-31-300 with S/Nos. 31-2 to 31-80102010; All models PA- 31-325 with S/Nos. 31-7512006 to 31-8012010; All models PA-31-350 with S/Nos. 31-5001 to to 31-8052025; All models PA-31P with S/Nos. 31P-1 to 31P-7730012; All models PA-31T with S/Nos. 31T-7400002 to 31T-8020086; All models PA-31T1 with S/Nos. 31T-7804001 to 31T-8104001.\n\nRequirement: Action in accordance with Piper SB No. 647A.\n\nCompliance: 1. Unless already accomplished inspect within 100 hours time in service after 12 January 1981 and thereafter at intervals not exceeding 100 hours time in service for the next succeeding 300 hours time in service and thereafter at intervals not exceeding 50 hours time in service until modified.\n\n2. Modify before 30 June 1981.\n\nBackground: Piper SB No. 647 Amendment “A” adds additional aeroplanes to applicability. This AD amendment also allows additional time for incorporation of terminating modification.","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1904},"content_quality":"ok","complexity_score":4,"scope_assessment":{"changed":true,"description":"This amendment expands the original directive's scope by adding additional aircraft serial numbers to the applicability list and extending the compliance deadline for the terminating modification from the original date to 30 June 1981."},"complexity_factors":["Multiple specific serial number ranges across seven aircraft variants","Phased inspection intervals changing from 100-hour to 50-hour cycles","Cross-reference to external technical document (Piper Service Bulletin No. 647A) without reproducing its contents","Technical aviation terminology requiring industry knowledge (e.g., 'time in service', 'terminating modification')"],"plain_english_summary":"This Airworthiness Directive requires owners/operators of specified Piper PA-31 series aeroplanes (certain serial numbers) to inspect and repair the outboard flap track attachment and install a permanent modification. It mandates repeated inspections until the permanent fix is applied and extends the AD to more models while allowing extra time to complete the modification. The rule prevents possible flap-attachment failure that could threaten aircraft control in flight."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-31-91-amdt-1-outboard-flap-track-attachment","history":"/api/acts/ad-pa-31-91-amdt-1-outboard-flap-track-attachment/history","analysis":"/api/acts/ad-pa-31-91-amdt-1-outboard-flap-track-attachment/analysis","conflicts":"/api/acts/ad-pa-31-91-amdt-1-outboard-flap-track-attachment/conflicts","importantCases":"/api/acts/ad-pa-31-91-amdt-1-outboard-flap-track-attachment/important-cases","documents":"/api/acts/ad-pa-31-91-amdt-1-outboard-flap-track-attachment/documents"}}