{"id":"F2008L01841","name":"AD/PA-22/21 - Landing Gear Fairing - Modification - CANCELLED","slug":"ad-pa-22-21-landing-gear-fairing-modification-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":74033,"registerId":"commonwealth-F2008L01841-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Piper PA-22 (Tri-Pacer and Colt) Series ","sectionType":"division","heading":"Piper PA-22 (Tri-Pacer and Colt) Series Aeroplanes","content":"### Piper PA-22 (Tri-Pacer and Colt) Series Aeroplanes\n\n| AD/PA-22/21 | Landing Gear Fairing - Modification | 7/2008 |\n| ----------- | ----------------------------------- | ------ |\n\n| Requirement: | CANCELLED.                                                                                                                                                                                                                                                                                                                 |\n| ------------ | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|              | This AD is cancelled on 3 July 2008.                                                                                                                                                                                                                                                                                       |\n| Background:  | This Directive specified once-only modification of the fabric fairing on the main landing gear. This Directive was not based on a Piper service document or a USA Directive. This Directive has been in force since 1963 so all affected aircraft would have been modified long ago. Hence, this AD is no longer required. |\n\n![](image.001.png)\n\nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n19 May 2008","sortOrder":0},{"sectionNumber":"AD/PA-22/21","sectionType":"part","heading":"AD/PA-22/21","content":"## AD/PA-22/21","sortOrder":1},{"sectionNumber":"Landing Gear Fairing - Modification","sectionType":"part","heading":"Landing Gear Fairing - Modification","content":"## Landing Gear Fairing - Modification","sortOrder":2},{"sectionNumber":"7/2008","sectionType":"part","heading":"7/2008","content":"## 7/2008","sortOrder":3}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2498},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This instrument terminates the previous directive entirely rather than expanding its scope. It represents a conclusion of the regulatory requirement after its purpose was fulfilled, not an expansion or modification of the original mandate."},"complexity_factors":["Single operative provision stating 'CANCELLED'","No defined terms or interpretation section","No cross-references to other legislative instruments","No conditional logic, exceptions, or procedural steps","Document consists primarily of background explanation rather than operative text"],"plain_english_summary":"This document cancels an outdated aircraft safety rule that required owners of **Piper PA-22 Tri-Pacer and Colt** aeroplanes to modify the fabric covers (fairings) on their main landing gear.\n\n**What the old rule required**\nSince 1963, Airworthiness Directive (AD) PA-22/21 mandated a one-time modification to the fabric fairing on the main landing gear of these specific Piper aircraft.\n\n**Why it was cancelled**\nThe Civil Aviation Safety Authority cancelled this directive on 3 July 2008 because it had been in force for 45 years. By that time, every affected aircraft still in operation would have already completed the required modification. Keeping the rule served no practical purpose.\n\n**What this means for aircraft owners**\nIf you own a Piper PA-22 series aircraft, you no longer need to check or comply with this specific directive. The cancellation removes a redundant compliance obligation without imposing any new requirements."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-22-21-landing-gear-fairing-modification-cancelled","history":"/api/acts/ad-pa-22-21-landing-gear-fairing-modification-cancelled/history","analysis":"/api/acts/ad-pa-22-21-landing-gear-fairing-modification-cancelled/analysis","conflicts":"/api/acts/ad-pa-22-21-landing-gear-fairing-modification-cancelled/conflicts","importantCases":"/api/acts/ad-pa-22-21-landing-gear-fairing-modification-cancelled/important-cases","documents":"/api/acts/ad-pa-22-21-landing-gear-fairing-modification-cancelled/documents"}}