{"id":"F2008L02639","name":"AD/PA-31/77 Amdt 1 - Fuel Crossfeed Valve - Inspection - CANCELLED","slug":"ad-pa-31-77-amdt-1-fuel-crossfeed-valve-inspection-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":74675,"registerId":"commonwealth-F2008L02639-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Piper PA-31 Series Aeroplanes","sectionType":"division","heading":"Piper PA-31 Series Aeroplanes","content":"### Piper PA-31 Series Aeroplanes\n\n| AD/PA-31/77 Amdt 1 | Fuel Crossfeed Valve - Inspection | 8/2008 |\n| ------------------ | --------------------------------- | ------ |\n\n| Requirement: | CANCELLED.                                                                                                                                                                                                                                     |\n| ------------ | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|              | This AD is cancelled on 31 July 2008.                                                                                                                                                                                                          |\n| Background:  | This unique Australian AD required once-only inspection of the fuel crossfeed valve in accordance with Piper SB No. 645A. The AD required compliance within 100 hours TIS after September 1979. All affected aircraft have now been inspected. |\n\n![](image.001.png)\n\nJames Coyne  \nDelegate of the Civil Aviation Safety Authority\n\n13 June 2008","sortOrder":0},{"sectionNumber":"AD/PA-31/77 Amdt 1","sectionType":"part","heading":"AD/PA-31/77 Amdt 1","content":"## AD/PA-31/77 Amdt 1","sortOrder":1},{"sectionNumber":"Fuel Crossfeed Valve - Inspection","sectionType":"part","heading":"Fuel Crossfeed Valve - Inspection","content":"## Fuel Crossfeed Valve - Inspection","sortOrder":2},{"sectionNumber":"8/2008","sectionType":"part","heading":"8/2008","content":"## 8/2008","sortOrder":3}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1978},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This instrument is a cancellation notice with the sole purpose of revoking Airworthiness Directive AD/PA-31/77. Its scope is limited to that specific revocation and has not expanded beyond the original intent of terminating the inspection requirement once universal compliance was achieved."},"complexity_factors":["Single operative provision (cancellation of previous directive)","No defined terms, exceptions, or conditional logic","Minimal cross-references (only cites previous AD and manufacturer service bulletin for context)","Extremely short length with straightforward purpose"],"plain_english_summary":"**What this does:** This document cancels a previous aviation safety rule that required owners of Piper PA-31 aircraft to inspect their fuel crossfeed valves.\n\n**Who it affects:** Owners and operators of Piper PA-31 series aeroplanes (twin-engine aircraft).\n\n**Why it matters:** The original directive mandated a one-time inspection of the fuel crossfeed valve (a component that lets fuel flow between tanks) according to manufacturer guidelines. This cancellation removes that requirement entirely because all affected aircraft have already been inspected. Operators no longer need to perform this check or maintain records proving compliance with the old rule."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-31-77-amdt-1-fuel-crossfeed-valve-inspection-cancelled","history":"/api/acts/ad-pa-31-77-amdt-1-fuel-crossfeed-valve-inspection-cancelled/history","analysis":"/api/acts/ad-pa-31-77-amdt-1-fuel-crossfeed-valve-inspection-cancelled/analysis","conflicts":"/api/acts/ad-pa-31-77-amdt-1-fuel-crossfeed-valve-inspection-cancelled/conflicts","importantCases":"/api/acts/ad-pa-31-77-amdt-1-fuel-crossfeed-valve-inspection-cancelled/important-cases","documents":"/api/acts/ad-pa-31-77-amdt-1-fuel-crossfeed-valve-inspection-cancelled/documents"}}