{"id":"F2008L02641","name":"AD/PA-31/74 Amdt 1 - Hose Assembly - Inspection and Replacement - CANCELLED","slug":"ad-pa-31-74-amdt-1-hose-assembly-inspection-and-replacement-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":74678,"registerId":"commonwealth-F2008L02641-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Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Piper PA-31 Series Aeroplanes","sectionType":"division","heading":"Piper PA-31 Series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-31/74 Amdt 1 | Hose Assembly - Inspection and Replacement | 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 and replacement of MLG hose assemblies in accordance with Piper SB No. 629. The AD required compliance within 25 hours TIS after December 1978. All affected aircraft have now been modified. |\n\n![](image.001.png)\n\nJames Coyne  \nDelegate of the Civil Aviation Safety Authority\n\n12 June 2008","sortOrder":0},{"sectionNumber":"AD/PA-31/74 Amdt 1","sectionType":"part","heading":"AD/PA-31/74 Amdt 1","content":"## AD/PA-31/74 Amdt 1","sortOrder":1},{"sectionNumber":"Hose Assembly - Inspection and Replaceme","sectionType":"part","heading":"Hose Assembly - Inspection and Replacement","content":"## Hose Assembly - Inspection and Replacement","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":2376},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"The legislation has been terminated rather than expanded. The original purpose (ensuring hose assembly replacement for safety) has been fulfilled fleet-wide, leading to complete revocation of the instrument rather than scope creep."},"complexity_factors":["Single operative provision (cancellation of preceding instrument)","No definitions, interpretation clauses, or cross-references to other legislation","No conditional logic, exceptions, or compliance deadlines imposed","Document consists almost entirely of background explanation rather than active legal obligations"],"plain_english_summary":"This instrument officially cancels an older aviation safety rule (**Airworthiness Directive AD/PA-31/74**) that applied to **Piper PA-31 series aircraft** (including Navajo models).\n\n**What the original rule required:**\nThe 1974 directive mandated a one-time inspection and replacement of main landing gear (MLG) hydraulic hose assemblies. Operators had to complete this work within 25 flight hours after December 1978, following specific manufacturer guidelines (Piper Service Bulletin No. 629).\n\n**What this document does:**\nIt permanently removes that inspection requirement as of **31 July 2008**. The Civil Aviation Safety Authority has cancelled the rule because all affected aircraft have already been modified, meaning the safety issue has been resolved across the entire fleet.\n\n**Why this matters:**\nAircraft owners and maintenance engineers no longer need to track or comply with this specific directive. However, they must still maintain records proving the original modification was completed."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-31-74-amdt-1-hose-assembly-inspection-and-replacement-cancelled","history":"/api/acts/ad-pa-31-74-amdt-1-hose-assembly-inspection-and-replacement-cancelled/history","analysis":"/api/acts/ad-pa-31-74-amdt-1-hose-assembly-inspection-and-replacement-cancelled/analysis","conflicts":"/api/acts/ad-pa-31-74-amdt-1-hose-assembly-inspection-and-replacement-cancelled/conflicts","importantCases":"/api/acts/ad-pa-31-74-amdt-1-hose-assembly-inspection-and-replacement-cancelled/important-cases","documents":"/api/acts/ad-pa-31-74-amdt-1-hose-assembly-inspection-and-replacement-cancelled/documents"}}