{"id":"F2006B05389","name":"AD/PA-18/10 - Wing Fuel Tank Cap - Modification","slug":"ad-pa-18-10-wing-fuel-tank-cap-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":46002,"registerId":"commonwealth-F2006B05389-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-18/10 - Wing Fuel Tank Cap - 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-18 and 19 (Super Cub) Series Aeroplanes\n\n \n\nAD/PA-18/10 Wing Fuel Tank Cap - Modification 5/78\n\nApplicability: Group 1 - Model PA-18 with S/Nos. 18-1 to 18-7609068. Applies only if a wing fuel tank cap has been replaced with either tank cap P/N 15296-02 since 1 June 1976 or, tank cap P/N 60707-02 modified as per Piper SB No. 522.\n\n \n\nGroup 2 - Model PA-18-150 with S/Nos. 18-7609069 to18- 7809001, 18-7809003 to\n\n18-7809013, 18-7809105 to 18- 7809030, 18-7809034, 18-7809035, 18-7809041, 18-\n\n7809043, 18-7809046, 18-7809048 to 18-7809051, 18- 7809053, 18-7809054, 18-\n\n7809056, 18-7809058 and 18- 1809059.\n\n \n\nDocument: Piper SB No. 573.\n\n \n\nCompliance: Within 100 hours time in service after 31 May 1978.\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2059},"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive maintains its original narrow technical scope — a targeted safety modification for specific aircraft with identified fuel cap deficiencies. No expansion beyond the original remedial purpose is evident."},"complexity_factors":["Conditional applicability for Group 1 requiring verification of prior maintenance history and part numbers","Fragmented serial number ranges in Group 2 requiring careful aircraft logbook cross-referencing","Dependence on external technical document (Piper Service Bulletin 573) not reproduced in the directive","Aviation-specific terminology (P/N, time in service, SB) requiring technical domain knowledge"],"plain_english_summary":"**Safety fix for fuel tank caps:** Owners and operators of specific Piper Super Cub aircraft must modify their wing fuel tank caps to prevent fuel system hazards.\n\n**Who must comply:**\n- **Group 1:** PA-18 models (serial numbers 18-1 to 18-7609068) — **only if** the wing fuel tank cap was replaced with part number 15296-02 or modified part number 60707-02 since 1 June 1976\n- **Group 2:** PA-18-150 models with the specific serial numbers listed in the directive\n\n**What you must do:** Modify the wing fuel tank cap according to Piper Service Bulletin No. 573 within 100 hours of flight time after 31 May 1978.\n\n**Why this matters:** Defective fuel tank caps can cause fuel leaks, ventilation problems, or fire hazards. This ensures the caps meet current safety standards."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-18-10-wing-fuel-tank-cap-modification","history":"/api/acts/ad-pa-18-10-wing-fuel-tank-cap-modification/history","analysis":"/api/acts/ad-pa-18-10-wing-fuel-tank-cap-modification/analysis","conflicts":"/api/acts/ad-pa-18-10-wing-fuel-tank-cap-modification/conflicts","importantCases":"/api/acts/ad-pa-18-10-wing-fuel-tank-cap-modification/important-cases","documents":"/api/acts/ad-pa-18-10-wing-fuel-tank-cap-modification/documents"}}