{"id":"F2006B06589","name":"AD/RES/21 - Pacific Scientific Lap Belt Assemblies","slug":"ad-res-21-pacific-scientific-lap-belt-assemblies","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":48399,"registerId":"commonwealth-F2006B06589-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/RES/21 - Pacific Scientific Lap Belt Assemblies","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 107 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nRestraint Equipment\n\nAD/RES/21 Pacific Scientific Lap Belt Assemblies 1/88\n\nApplicability: All Pacific Scientific lap belt assemblies P/N 1107177 (all dash numbers).\n\nRequirement: Inspect all Pacific Scientific TSO C22f lap belt assemblies, part number 1107177 (all dash numbers), to determine if they have part number 1106294-01 retractor shafts made of the correct material. This is determined by visual examination of the end of the shaft. If the colour is gold anodise, the shaft is acceptable. If the colour is dull battleship grey anodise, the shaft must be replaced.\n\nFAA AD 87-20-05 dated 26 October 1987 refers.\n\nPacific Scientific Safety Advisory Letter on Mark V Reel Lap Belt Assembly refers.\n\nCompliance: Inspect prior to the issue of the Maintenance Release after 30 June 1988. Replace defective shafts within 5 hours time in service.\n\nBackground: Pacific Scientific has found that batches of inertia reel shafts fitted to the applicable lap belt assemblies were manufactured using incorrect material. These shafts have failed at loads below that required by TSO C22f.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a targeted safety directive addressing a specific manufacturing defect in a specific aircraft component. It has not expanded beyond its original purpose of ensuring seatbelt shaft integrity."},"complexity_factors":["Single, specific part number with limited dash number variations","Simple binary compliance test (visual colour check: gold vs grey)","No nested exceptions or conditional logic","Clear, single deadline with straightforward replacement timeline","Only 2 external references (FAA AD and manufacturer letter)","No defined terms section — uses standard aviation terminology (TSO C22f, Maintenance Release, time in service)"],"plain_english_summary":"This AD requires inspection of all Pacific Scientific lap belt assemblies (P/N 1107177) by visually checking the retractor shaft end: gold anodised shafts are acceptable; dull grey shafts must be replaced. It affects aircraft operators using these belts and licensed maintenance engineers who issue Maintenance Releases.\n\nIt matters because some shafts were made from the wrong metal and can break under lower-than-required loads, risking seatbelt failure. Inspect before the next Maintenance Release after 30 June 1988; replace defects within 5 flight hours."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"No. The directive confines action to all Pacific Scientific lap belt assemblies P/N 1107177 and requires inspection and replacement of retractor shafts made from incorrect material that have failed below the TSO C22f requirement. It does not expand obligations beyond those parts or the stated remedial steps (see Applicability, Requirement, Background, Compliance)."},"complexity_factors":["Part-specific applicability — targets a single part number P/N 1107177 (Applicability)","Simple visual-pass/fail determination (anodise colour) but potential for inspection disputes (Requirement)","Short, fixed compliance window and a 5-hour time‑in‑service replacement limit, affecting maintenance scheduling (Compliance)","Safety-critical context: failure below TSO C22f load requirement motivates mandatory action (Background)","Cross-reference to FAA AD 87-20-05 and Pacific Scientific advisory, requiring coordination with external documents (Requirement)"],"plain_english_summary":"Requires inspection of all Pacific Scientific lap belt assemblies (P/N 1107177) to check the material of the retractor shaft by its anodise colour: gold = acceptable, dull battleship grey = must be replaced. Inspections must be done before the Maintenance Release issued after 30 June 1988 and any defective shaft replaced within 5 hours time in service.\n\nAffects aircraft operators and maintenance organisations using these belts; it imposes inspection and replacement costs and relies on a visual check. The AD responds to shafts that have failed below the TSO C22f load requirement (see Requirement, Compliance, Background)."}},"importantCases":[],"_links":{"self":"/api/acts/ad-res-21-pacific-scientific-lap-belt-assemblies","history":"/api/acts/ad-res-21-pacific-scientific-lap-belt-assemblies/history","analysis":"/api/acts/ad-res-21-pacific-scientific-lap-belt-assemblies/analysis","conflicts":"/api/acts/ad-res-21-pacific-scientific-lap-belt-assemblies/conflicts","importantCases":"/api/acts/ad-res-21-pacific-scientific-lap-belt-assemblies/important-cases","documents":"/api/acts/ad-res-21-pacific-scientific-lap-belt-assemblies/documents"}}