{"id":"F2006B06941","name":"AD/SF340/12 - Air Conditioning System Couplings","slug":"ad-sf340-12-air-conditioning-system-couplings","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":114834,"registerId":"commonwealth-F2006B06941-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/SF340/12 - Air Conditioning System Couplings","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)  \nSAAB SF340 Series Aeroplanes\n\nAD/SF340/12 Air Conditioning System Couplings 1/89\n\nApplicability: Model SF 340A with serial numbers \\-003 through \\-138.\n\nRequirement: 1. Action in accordance with SAAB Service Bulletin No SF 340-21-022, Accomplishment Instruction (C) (1), (2), and (3).\n\n2. Action in accordance with SAAB SB No SF 340-21-022, Accomplishment Instruction No C (4).\n\nNote: Swedish AD No 1-029 refers.\n\nCompliance: 1. At the next B \\- check after 26 January 1989.\n\n2. (a) At the next B \\- check after 26 January 1989; and\n\n(b) any time a Gamah coupling is subsequently removed and installed.\n\nBackground: Bleed air leakage in the ACM compartment caused by “Gamah” type coupling separation has resulted in structural damage due to overheated panels with resultant bonding separation between stringers and skin panel.","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1453},"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This directive maintains its original targeted scope of addressing a specific mechanical defect in defined aircraft models. It has not expanded beyond its initial safety purpose of preventing air conditioning coupling failures."},"complexity_factors":["Requires access to external technical document (SAAB Service Bulletin) to understand full compliance steps","Conditional ongoing obligation triggered by future maintenance actions","Technical aviation terminology requiring specialist knowledge (B-check, bleed air, ACM compartment)","Narrow applicability criteria based on specific aircraft serial numbers"],"plain_english_summary":"This directive requires operators of SAAB SF340A aircraft (serials 003–138) to carry out safety repairs from SAAB Service Bulletin 340‑21‑022 because Gamah air‑conditioning couplings can separate and let hot bleed air into the Air Cycle Machine compartment, overheating and detaching structure. Required actions must be completed at the next B‑check after 26 Jan 1989, including a recurring measure that must also be repeated whenever a Gamah coupling is removed and reinstalled."}},"importantCases":[],"_links":{"self":"/api/acts/ad-sf340-12-air-conditioning-system-couplings","history":"/api/acts/ad-sf340-12-air-conditioning-system-couplings/history","analysis":"/api/acts/ad-sf340-12-air-conditioning-system-couplings/analysis","conflicts":"/api/acts/ad-sf340-12-air-conditioning-system-couplings/conflicts","importantCases":"/api/acts/ad-sf340-12-air-conditioning-system-couplings/important-cases","documents":"/api/acts/ad-sf340-12-air-conditioning-system-couplings/documents"}}