{"id":"F2008L02460","name":"AD/PA-31/117 - Elevator Spar, False Spar and Butt Rib - CANCELLED","slug":"ad-pa-31-117-elevator-spar-false-spar-and-butt-rib-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":74398,"registerId":"commonwealth-F2008L02460-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Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Piper PA-31 Series Aeroplanes","sectionType":"division","heading":"Piper PA-31 Series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-31/117 | Elevator Spar, False Spar and Butt Rib | 8/2008 |\n| ------------ | -------------------------------------- | ------ |\n\n| Requirement: | CANCELLED.                                                                                                                                                                                                                                                                        |\n| ------------ | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|              | This AD is cancelled on 31 July 2008.                                                                                                                                                                                                                                             |\n| Background:  | This unique Australian AD required inspection of the elevator at intervals of 500 hours TIS in accordance with Part I of Piper SB No. 897A until compliance with Part II was achieved. This AD was published in 1990, so all affected aircraft would have been modified long ago. |\n\n![](image.001.png)\n\nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n17 June 2008","sortOrder":0},{"sectionNumber":"AD/PA-31/117","sectionType":"part","heading":"AD/PA-31/117","content":"## AD/PA-31/117","sortOrder":1},{"sectionNumber":"Elevator Spar, False Spar and Butt Rib","sectionType":"part","heading":"Elevator Spar, False Spar and Butt Rib","content":"## Elevator Spar, False Spar and Butt Rib","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":2350},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":true,"description":"This instrument fundamentally changes the scope from the original 1990 AD, which mandated recurring inspections of elevator components, to a complete cancellation of those requirements as of 31 July 2008."},"complexity_factors":["Single operative provision (cancellation)","No defined terms","No conditional logic or exceptions","Minimal cross-referencing (only historical reference to previous directive and service bulletin)"],"plain_english_summary":"This cancels a longstanding Airworthiness Directive requiring 500‑hour elevator inspections on certain Piper PA‑31 aircraft, effective 31 July 2008. The original 1990 AD mandated inspections of the elevator spar, false spar, and butt rib until a permanent modification was installed.\n\nIt affects owners/operators of PA‑31 series planes and mainly removes an obsolete regulatory burden—authorities expect most affected aircraft were already modified, so the cancellation tidies the rulebook."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-31-117-elevator-spar-false-spar-and-butt-rib-cancelled","history":"/api/acts/ad-pa-31-117-elevator-spar-false-spar-and-butt-rib-cancelled/history","analysis":"/api/acts/ad-pa-31-117-elevator-spar-false-spar-and-butt-rib-cancelled/analysis","conflicts":"/api/acts/ad-pa-31-117-elevator-spar-false-spar-and-butt-rib-cancelled/conflicts","importantCases":"/api/acts/ad-pa-31-117-elevator-spar-false-spar-and-butt-rib-cancelled/important-cases","documents":"/api/acts/ad-pa-31-117-elevator-spar-false-spar-and-butt-rib-cancelled/documents"}}