{"id":"F2006B08569","name":"AD/CJ610/5 - Compressor Discs","slug":"ad-cj610-5-compressor-discs","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":51408,"registerId":"commonwealth-F2006B08569-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CJ610/5 - Compressor Discs","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 106 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nGeneral Electric Turbine Engines \\- CJ610 Series\n\nAD/CJ610/5 Compressor Discs 9/85\n\nApplicability: CJ610-5, \\-6, engines with compressor discs identified by Serial Numbers.\n\nRequirement: 1. Remove from service sixth stage compressor discs, P/N 37D401316P101, and seventh stage compressor discs, P/N 37D401317P101, having S/Nos. listed below and replace with serviceable discs:\n\nSerial Numbers:\n\nStage 6: 07911, 07932,\n\nStage 7: 08742, 08745, 08756, 08760, 08761, 08767, 08806, 08815, 08818,\n\n08822, 08825, 08826, 08832, 08849, 08851, 08853, 08867, 08873,\n\n08876, 08879, 08891, 08895, 08897, 08899, 09120, 09127, 09145.\n\n    2. Inspect first stage compressor discs, P/Nos. 37E501428P102 and 37E50142SP106, with S/Nos. listed below for material properties in accordance with General Electric Company CJ610 engine alert SB No. (CJ610) A72-130, dated March 8, 1978, or CF700 engine alert SB No. (CF700) A72-140, dated March 8, 1978, as appropriate, or later approved revision.\n\nSerial Numbers: 09804, 09811, 09825, 09847, 09861.\n\n    3. Discs determined to be satisfactory per General Electric Company inspection procedures may be returned to service. Replace unsatisfactory discs with serviceable discs.\n\n    4. Discs removed from service are to be forwarded to General Electric Company for evaluation; or\n\nFAA AD 78-07-06 Amdt. 39-3169; or AD/GE-T/33.\n\nCompliance: Within 10 flights after 17 March 1978.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive addressing a specific known defect in specific engine parts. It has not expanded beyond its original purpose of grounding/inspecting faulty compressor discs. The scope remains precisely limited to the identified serial numbers and engine models."},"complexity_factors":["Single, specific technical subject matter (compressor discs in one engine series)","Only 4 operational requirements, clearly numbered","Limited applicability — only two engine models and specific serial numbers","No defined terms section or interpretation provisions","No cross-references to other legislation beyond noting equivalent FAA directive","Straightforward compliance deadline (within 10 flights after fixed date)","Document is essentially a maintenance instruction with regulatory force"],"plain_english_summary":"CASA’s AD requires removal/replacement of certain sixth- and seventh-stage compressor discs, inspection of specified first-stage discs, and return of removed parts to General Electric for CJ610 series engines.  \n\nIt affects operators of CJ610-5/6-powered aircraft (airlines, charters, private owners). Issued as an urgent safety action because material/manufacturing defects in those discs could cause catastrophic engine failure; the AD adopts the FAA’s corresponding order."},"flash_summary_failed":{"failed":true,"reason":"A positive credit balance is required for all requests, including BYOK, so fallback providers remain available. Add credits at https://vercel.com/d?to=%2F%5Bteam%5D%2F%7E%2Fai%3Fmodal%3Dtop-up to continue.","source":"analysis-cron"},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The text identifies a precise set of affected engines and serial-numbered parts and prescribes removal/inspection/replacement and forwarding for evaluation. There is no language within this instrument indicating a change to the scope from an earlier version or different intent; it sets clear, narrow applicability and actions."},"complexity_factors":["Specificity: prescribes actions for narrowly listed part numbers and many individual serial numbers, raising administrative tracking burdens.","Multiple actions: removal, inspection to manufacturer procedures, replacement if unsatisfactory, and forwarding removed parts for manufacturer evaluation.","Cross-references: requires compliance with GE service alerts (A72-130 / A72-140) or later approved revisions and cites FAA AD and other ADs, adding dependence on external documents.","Short compliance window: compliance required within 10 flights of a fixed date increases operational disruption and scheduling pressure.","Limited applicability: applies only to CJ610-5 and -6 engines but requires engine-by-engine verification, creating per-aircraft effort."],"plain_english_summary":"This airworthiness directive requires operators of General Electric CJ610‑5 and ‑6 engines fitted with specified compressor-disc serial numbers to remove listed sixth‑ and seventh‑stage discs, inspect certain first‑stage discs per GE service alerts, replace any found unsatisfactory, and send removed parts to GE for evaluation.\n\nIt affects aircraft operators and maintenance organisations, who pay for inspections, replacements and shipping, and must comply within 10 flights of 17 March 1978 (see Compliance)."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cj610-5-compressor-discs","history":"/api/acts/ad-cj610-5-compressor-discs/history","analysis":"/api/acts/ad-cj610-5-compressor-discs/analysis","conflicts":"/api/acts/ad-cj610-5-compressor-discs/conflicts","importantCases":"/api/acts/ad-cj610-5-compressor-discs/important-cases","documents":"/api/acts/ad-cj610-5-compressor-discs/documents"}}