{"id":"F2006B08447","name":"AD/CESSNA 650/4 - Thrust Reverser Throttle Load Limiter","slug":"ad-cessna-650-4-thrust-reverser-throttle-load-limiter","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":115946,"registerId":"commonwealth-F2006B08447-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CESSNA 650/4 - Thrust Reverser Throttle Load Limiter","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)  Cessna 650 (Citation III) Series Aeroplanes\n\n \n\nAD/CESSNA 650/4 Thrust Reverser Throttle Load Limiter 7/93\n\nApplicability: Serial numbers -0001 to -0217.\n\n \n\nRequirement: Modify in accordance with Cessna SB 650-78-05 Rev 1.\n\n \n\nNote: FAA AD 93-05-15 refers.\n\n \n\nCompliance: Within 150 hours time in service after 24 June 1993.\n\n \n\nBackground:  There has been an incident where an attempt to advance the throttle control levers during thrust reverser transition resulted in activation of the spring loaded limiter device. Subsequent displacement of the load limiter resulted in severely reduced power control authority.\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":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive addressing a specific mechanical defect in a specific aircraft model range. It has not expanded beyond its original purpose of mandating a single modification to prevent throttle control authority loss."},"complexity_factors":["Extremely short document (under 200 words)","Only 4 operative provisions: applicability, requirement, note, and compliance","Single cross-reference to FAA AD 93-05-15 (informational only)","Single technical reference to Cessna Service Bulletin (external document)","No defined terms section","No conditional logic or nested exceptions","Straightforward command structure: 'Modify in accordance with...'"],"plain_english_summary":"**What this is:** This is an **Airworthiness Directive (AD)** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA). Think of it as a \"recall notice\" for aircraft, but legally binding.\n\n**What it does:** It requires owners and operators of specific Cessna 650 (Citation III) business jets to modify the **thrust reverser throttle load limiter** — a safety device that prevents pilots from accidentally applying too much throttle when the thrust reversers (which help slow the plane down after landing) are deploying.\n\n**The safety problem:** There was an incident where a pilot tried to advance the throttle during thrust reverser transition. This activated a spring-loaded limiter, which then moved out of position. The result? The pilots suddenly had much less control over engine power than they expected — a dangerous situation.\n\n**Who must comply:** Anyone operating Cessna 650 aircraft with serial numbers -0001 through -0217 (the early production models).\n\n**What must be done:** Modify the aircraft according to **Cessna Service Bulletin 650-78-05 Revision 1** — essentially, follow the manufacturer's official repair instructions.\n\n**When:** Within 150 hours of flight time after 24 June 1993.\n\n**Why it matters:** This prevents a scenario where pilots lose engine power authority during a critical phase of flight (landing rollout), which could lead to loss of control or runway overrun."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive sets a targeted, time-limited requirement for modification of specific serial-numbered aircraft and cites a single technical remedy. The text does not indicate any expansion or contraction of scope from the directive’s stated purpose; it applies only to serial numbers -0001 to -0217 and requires modification per the named Service Bulletin (Applicability; Requirement)."},"complexity_factors":["Narrow applicability to a defined serial-number range (Applicability)","Single specified remedial action with reference to an external Service Bulletin for technical details (Requirement)","Short, specific compliance window expressed in flight hours after a fixed date (Compliance)","Dependence on an external technical document (Cessna SB 650-78-05 Rev 1) for implementation details (Requirement)","Cross-reference to a corresponding FAA AD, requiring coordination or awareness of parallel regulatory material (Note)"],"plain_english_summary":"This AD requires owners/operators of Cessna 650 (Citation III) airframes serials -0001 to -0217 to carry out a specific mechanical modification, per Cessna Service Bulletin 650-78-05 Rev 1, within 150 hours TIS after 24 June 1993. It responds to an incident where a displaced spring‑loaded throttle load limiter severely reduced power control authority, so compliance is mandatory to restore safe engine control."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-650-4-thrust-reverser-throttle-load-limiter","history":"/api/acts/ad-cessna-650-4-thrust-reverser-throttle-load-limiter/history","analysis":"/api/acts/ad-cessna-650-4-thrust-reverser-throttle-load-limiter/analysis","conflicts":"/api/acts/ad-cessna-650-4-thrust-reverser-throttle-load-limiter/conflicts","importantCases":"/api/acts/ad-cessna-650-4-thrust-reverser-throttle-load-limiter/important-cases","documents":"/api/acts/ad-cessna-650-4-thrust-reverser-throttle-load-limiter/documents"}}