{"id":"F2006B08448","name":"AD/CESSNA 650/5 - Engine and Flight Data Monitoring","slug":"ad-cessna-650-5-engine-and-flight-data-monitoring","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":115949,"registerId":"commonwealth-F2006B08448-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CESSNA 650/5 - Engine and Flight Data Monitoring","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)  \nCessna 650 (Citation III) Series Aeroplanes\n\nAD/CESSNA 650/5 Engine and Flight Data Monitoring 11/94\n\nDM\n\nApplicability: Cessna 650 series aircraft fitted with AlliedSignal TFE731-3 series engines not incorporating AlliedSignal Service Bulletin TFE731-72-3509.\n\nRequirement: 1. Amend the Limitation Section of the Airplane Flight Manual (AFM) to reflect the requirements of Federal Aviation Administration (FAA) Airworthiness Directive (AD) 94-07-03, paragraphs (a), (1), (2), (3) and (4) by inserting AFM amendment A/C650/9, and\n\n    2. calculate the data recorded in accordance with FAA AD 94-07-03, paragraph (b), (1), and\n\n    3. action in accordance with FAA AD 94-07-03, paragraph (b), (2), and\n\n    4. action in accordance with FAA AD 94-07-03, paragraph (c).\n\n    5. Compliance with the Requirements of CAO 106, AD/TFE731/25 on both engines provides a terminating action for the Requirements 1 through 4 of this Directive.\n\nCompliance: Effective 14 September 1994; Unless previously accomplished, prior to further flight.\n\nBackground: This Directive has been issued to address reports of uncontained failure of the first stage low pressure turbine disc following failure of certain low pressure turbine nozzle A5 airseals. This Directive requires the monitoring of engine parameters, the calculation of recorded data, the monitoring of the engines for N1 rotation during start and the monitoring of the engines for rubbing noises after engine shutdown.","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"The directive applies only to Cessna 650 aircraft with AlliedSignal TFE731‑3 engines not incorporating the specified service bulletin and sets AFM amendment and monitoring requirements; it also specifies a terminating action (CAO 106/AD/TFE731/25) if complied with on both engines. The text shows no expansion or narrowing of applicability beyond that stated."},"complexity_factors":["Cross-reference to FAA AD 94-07-03 (operators must interpret and implement specific FAA paragraphs referenced in Requirements 1–4 and (b)/(c)).","Technical data work: calculation and analysis of recorded engine parameters per FAA AD paragraph (b) increases operational/data-analysis burden.","Operational monitoring: requires monitoring N1 rotation during start and listening for rubbing noises after shutdown (continuous procedural changes for crews/maintenance).","Administrative action: insertion of AFM amendment A/C650/9 into the Limitation Section (document change control).","Conditional terminating action: compliance is negated only if CAO 106/AD/TFE731/25 is accomplished on both engines, requiring record verification.","Immediate compliance timing: 'prior to further flight' creates short lead time for affected operators to implement changes."],"plain_english_summary":"This airworthiness directive requires operators of Cessna 650 (Citation III) aeroplanes fitted with AlliedSignal TFE731‑3 engines (unless modified by AlliedSignal Service Bulletin TFE731‑72‑3509) to update the Airplane Flight Manual, monitor engine parameters, calculate recorded engine data and take specified follow-up actions as set out in the referenced FAA AD. Compliance is required before further flight. Operators pay the compliance cost and must change procedures and monitoring routines; CASA enforces compliance. The directive is ended for an aeroplane only if both engines comply with CAO 106/AD/TFE731/25."},"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"},"kimi_summary":{"content_quality":"ok","complexity_score":4,"scope_assessment":{"changed":false,"description":"This is a straightforward implementation of a foreign airworthiness directive (FAA AD 94-07-03) into Australian law. The scope remains tightly focused on the specific safety issue (turbine disc failures due to airseal defects) and the specific aircraft/engine combination. The terminating action provision is a standard administrative efficiency measure, not scope creep."},"complexity_factors":["Heavy reliance on external documents: requires cross-referencing to FAA AD 94-07-03 for actual substantive requirements (paragraphs a, b, c with multiple sub-paragraphs)","Conditional applicability: exclusion for engines with specific service bulletin incorporation","Nested compliance pathways: primary requirements vs. terminating action through compliance with separate Australian directive (CAO 106, AD/TFE731/25)","Technical aviation terminology requiring domain knowledge: 'uncontained failure', 'N1 rotation', 'low pressure turbine nozzle A5 airseals'","Dual regulatory framework: Australian AD implementing US FAA directive, creating jurisdictional layering"],"plain_english_summary":"This CASA Airworthiness Directive mandates safety actions for Cessna 650 (Citation III) aircraft with AlliedSignal TFE731‑3 engines (unless those engines were modified per SB TFE731‑72‑3509). It requires updating the flight manual, calculating recorded engine data, monitoring N1 during startup, and listening for rubbing after shutdown; compliance with CAO 106 (AD/TFE731/25) on both engines is a terminating action. The AD addresses risk of uncontained low‑pressure turbine disc failure from faulty airseals and was immediately effective 14 Sep 1994."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-650-5-engine-and-flight-data-monitoring","history":"/api/acts/ad-cessna-650-5-engine-and-flight-data-monitoring/history","analysis":"/api/acts/ad-cessna-650-5-engine-and-flight-data-monitoring/analysis","conflicts":"/api/acts/ad-cessna-650-5-engine-and-flight-data-monitoring/conflicts","importantCases":"/api/acts/ad-cessna-650-5-engine-and-flight-data-monitoring/important-cases","documents":"/api/acts/ad-cessna-650-5-engine-and-flight-data-monitoring/documents"}}