{"id":"F2008L02976","name":"AD/PA-18/14 - Rear Fuselage Tail Plane Support Tubes - CANCELLED","slug":"ad-pa-18-14-rear-fuselage-tail-plane-support-tubes-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":74955,"registerId":"commonwealth-F2008L02976-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Piper PA-18 and 19 (Super Cub) Series Ae","sectionType":"division","heading":"Piper PA-18 and 19 (Super Cub) Series Aeroplanes","content":"### Piper PA-18 and 19 (Super Cub) Series Aeroplanes\n\n| AD/PA-18/14 | Rear Fuselage Tail Plane Support Tubes | 9/2008 |\n| ----------- | -------------------------------------- | ------ |\n\n| Requirement: | CANCELLED.                                                                                                                                                                                                                                                                                          |\n| ------------ | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|              | This AD is cancelled on 28 August 2008.                                                                                                                                                                                                                                                             |\n| Background:  | This Directive specified a once-only inspection of the fuselage tubular structure near the horizontal stabiliser attachment lugs. Inspection was required at the later of April 1995 or 5000 hours time in service. This Directive was not based on a Piper service instruction or a USA Directive. |\n\n![](image.001.png)\n\nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n17 July 2008","sortOrder":0},{"sectionNumber":"AD/PA-18/14","sectionType":"part","heading":"AD/PA-18/14","content":"## AD/PA-18/14","sortOrder":1},{"sectionNumber":"Rear Fuselage Tail Plane Support Tubes","sectionType":"part","heading":"Rear Fuselage Tail Plane Support Tubes","content":"## Rear Fuselage Tail Plane Support Tubes","sortOrder":2},{"sectionNumber":"9/2008","sectionType":"part","heading":"9/2008","content":"## 9/2008","sortOrder":3}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1838},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This instrument performs a single, straightforward function—formally cancelling a previous Airworthiness Directive—without expanding beyond its stated purpose or adding new regulatory requirements."},"complexity_factors":["Extremely short document (under 150 words of operative text)","No defined terms or interpretation section","No cross-references to other legislative provisions","Single, unambiguous operation (cancellation of a previous instrument)","No conditional logic, exceptions, or procedural steps"],"plain_english_summary":"This document **cancels a previous aviation safety rule** for **Piper PA-18 and PA-19 Super Cub aircraft**. The original rule required a one-time inspection of the metal tubes in the rear fuselage that support the tail plane (the horizontal stabiliser—the wing at the back of the aircraft). Owners had to complete this inspection by April 1995 or after 5,000 hours of flight time, whichever came later. This cancellation means **aircraft owners and maintenance engineers no longer need to perform this specific inspection**. The original safety rule was created specifically by Australian authorities and was not based on manufacturer guidelines or American aviation directives."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-18-14-rear-fuselage-tail-plane-support-tubes-cancelled","history":"/api/acts/ad-pa-18-14-rear-fuselage-tail-plane-support-tubes-cancelled/history","analysis":"/api/acts/ad-pa-18-14-rear-fuselage-tail-plane-support-tubes-cancelled/analysis","conflicts":"/api/acts/ad-pa-18-14-rear-fuselage-tail-plane-support-tubes-cancelled/conflicts","importantCases":"/api/acts/ad-pa-18-14-rear-fuselage-tail-plane-support-tubes-cancelled/important-cases","documents":"/api/acts/ad-pa-18-14-rear-fuselage-tail-plane-support-tubes-cancelled/documents"}}