{"id":"F2008L02530","name":"AD/CESSNA 177/17 - Stabilator - CANCELLED","slug":"ad-cessna-177-17-stabilator-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":74503,"registerId":"commonwealth-F2008L02530-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Cessna 177 Series Aeroplanes","sectionType":"division","heading":"Cessna 177 Series Aeroplanes","content":"### Cessna 177 Series Aeroplanes\n\n| AD/CESSNA 177/17 | Stabilator | 8/2008 |\n| ---------------- | ---------- | ------ |\n\n| Requirement: | CANCELLED.                                                                                                                                                                                                                                                                                                                                                  |\n| ------------ | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|              | This AD is cancelled on 31 July 2008.                                                                                                                                                                                                                                                                                                                       |\n| Background:  | This unique Australian AD, issued in 1974, required on certain serial numbered aircraft, a one-off inspection of the stabilator balance in accordance with Cessna Service Letter SE 74-22. The AD compliance was within a 100 hours time in service after 31 December 1974. As all aircraft would have been inspected by now, the AD is no longer required. |\n\n![](image.001.png)\n\nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n18 June 2008","sortOrder":0},{"sectionNumber":"AD/CESSNA 177/17","sectionType":"part","heading":"AD/CESSNA 177/17","content":"## AD/CESSNA 177/17","sortOrder":1},{"sectionNumber":"Stabilator","sectionType":"part","heading":"Stabilator","content":"## Stabilator","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":1217},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"The instrument remains a straightforward cancellation of Airworthiness Directive AD/CESSNA 177/17, exactly as intended. There has been no expansion beyond the original purpose of removing an obsolete safety requirement."},"complexity_factors":["Single operative provision (cancellation only)","No defined terms requiring interpretation","No conditional logic or exceptions","No cross-references to other legislative instruments","Historical background provided for context but not legally binding"],"plain_english_summary":"**What this is:** This document cancels an old aviation safety rule (called an Airworthiness Directive) that applied to specific Cessna 177 aircraft.\n\n**What the original rule required:** Back in 1974, the Civil Aviation Safety Authority (CASA) issued a directive requiring owners of certain Cessna 177 planes to inspect the **stabilator** (a moveable control surface on the tail that helps the plane climb and descend) within 100 flight hours after 31 December 1974. The inspection had to check the balance of this control surface according to manufacturer guidelines.\n\n**Why it's being cancelled:** The deadline for that inspection was over 30 years ago. By 2008, every affected aircraft would have completed the required inspection long ago, so the rule was no longer necessary.\n\n**What happens now:** As of 31 July 2008, the requirement no longer exists. Cessna 177 operators no longer need to track or comply with this specific directive."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-177-17-stabilator-cancelled","history":"/api/acts/ad-cessna-177-17-stabilator-cancelled/history","analysis":"/api/acts/ad-cessna-177-17-stabilator-cancelled/analysis","conflicts":"/api/acts/ad-cessna-177-17-stabilator-cancelled/conflicts","importantCases":"/api/acts/ad-cessna-177-17-stabilator-cancelled/important-cases","documents":"/api/acts/ad-cessna-177-17-stabilator-cancelled/documents"}}