{"id":"F2006B05496","name":"AD/PA-23/69 - Stabilator Tab - Modification","slug":"ad-pa-23-69-stabilator-tab-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":46337,"registerId":"commonwealth-F2006B05496-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-23/69 - Stabilator Tab - Modification","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-generator: Aspose.Words for .NET 22.10.0\n---\n\n?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n\nCOMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Piper PA-23 (Apache and Aztec) Series Aeroplanes\n\n \n\nAD/PA-23/69 Stabilator Tab - Modification 11/76\n\nApplicability: All model PA23-250 Aztec “F” with S/Nos. 27-7654001 to 27-7654193. Document:               Piper SB No. 514.\n\nCompliance: Within 100 hours time in service after 30 November 1976.\n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2064},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a narrow, targeted airworthiness directive addressing a specific technical defect in specific aircraft. Its scope is limited to the stabilator tab modification for the identified Piper Aztec models, which is consistent with the standard purpose of ADs."},"complexity_factors":["Very short text with only one substantive requirement","Single condition of applicability (specific serial number range)","References external technical document (Service Bulletin 514) for actual modification details","Contains technical aviation terminology (stabilator, time in service)"],"plain_english_summary":"**What this does:** This is an Airworthiness Directive (AD) — a mandatory safety order issued under aviation law. It requires owners or operators of specific Piper Aztec aircraft to modify the **stabilator tab** (a movable surface on the tail that helps control the aircraft's up-and-down pitch).\n\n**Who it affects:** Only applies to Piper PA23-250 Aztec \"F\" model aircraft with serial numbers between 27-7654001 and 27-7654193.\n\n**What must be done:** The aircraft must be modified according to instructions in **Piper Service Bulletin No. 514** (a technical notice from the manufacturer) within 100 hours of flying time after 30 November 1976.\n\n**Why it matters:** This ensures a potential safety defect in the tail control system is fixed to prevent possible loss of aircraft control during flight."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-23-69-stabilator-tab-modification","history":"/api/acts/ad-pa-23-69-stabilator-tab-modification/history","analysis":"/api/acts/ad-pa-23-69-stabilator-tab-modification/analysis","conflicts":"/api/acts/ad-pa-23-69-stabilator-tab-modification/conflicts","importantCases":"/api/acts/ad-pa-23-69-stabilator-tab-modification/important-cases","documents":"/api/acts/ad-pa-23-69-stabilator-tab-modification/documents"}}