{"id":"F2006B05579","name":"AD/PA-25/7 - Main Undercarriage Safety Cable - Installation","slug":"ad-pa-25-7-main-undercarriage-safety-cable-installation","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":46601,"registerId":"commonwealth-F2006B05579-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-25/7 - Main Undercarriage Safety Cable - Installation","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nPiper PA-25 (Pawnee) Series Aeroplanes\n\nAD/PA-25/7 Main Undercarriage Safety Cable \\- Installation 5/75\n\nApplicability: All models.\n\nRequirement: 1. Modify all aeroplanes by installing a safety cable between the main undercarriage vee assembly and the fuselage frame to prevent the collapse of the undercarriage in the event of the shock strut, or the shock strut AN-20 bolt, failure.\n\n    2. The cable shall pass around the two tubes of the vee assembly at the shock strut end and between the vee formed by the two top diagonal tubes of the fuselage frame.\n\n    3. The length of the cable shall allow full undercarriage deflection and provision shall be made to prevent tubes from becoming worn by the cable.\n\n    4. The minimum acceptable cable strength is 7,000 lb. Compliance: Within 100 hours time in service from 30 May 1975.","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1318},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This directive remains targeted at the specific mechanical defect in Piper PA-25 aircraft landing gear for which it was originally issued. No expansion of scope beyond the original safety-critical modification."},"complexity_factors":["Specific technical specifications (7,000 lb minimum breaking strength)","Geometric installation requirements describing cable routing around and between structural tubes","Time-based compliance mechanism requiring calculation of 'hours time in service'","Wear prevention requirements without specifying exact materials or methods"],"plain_english_summary":"Owners/operators of Piper PA-25 Pawnee agricultural aircraft must fit a steel safety cable between the V‑type main landing gear and fuselage to prevent gear collapse if the shock strut or retaining bolt fails. The cable must loop around the strut tubes, allow normal gear movement, be protected against wear, and have a minimum 7,000 lb breaking strength. Work due within 100 flight hours after 30 May 1975."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-25-7-main-undercarriage-safety-cable-installation","history":"/api/acts/ad-pa-25-7-main-undercarriage-safety-cable-installation/history","analysis":"/api/acts/ad-pa-25-7-main-undercarriage-safety-cable-installation/analysis","conflicts":"/api/acts/ad-pa-25-7-main-undercarriage-safety-cable-installation/conflicts","importantCases":"/api/acts/ad-pa-25-7-main-undercarriage-safety-cable-installation/important-cases","documents":"/api/acts/ad-pa-25-7-main-undercarriage-safety-cable-installation/documents"}}