{"id":"F2006B11092","name":"AD/LEARJET 35/14 Amdt 1 - Tailcone Service Area - Inspection","slug":"ad-learjet-35-14-amdt-1-tailcone-service-area-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":56752,"registerId":"commonwealth-F2006B11092-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/LEARJET 35/14 Amdt 1 - Tailcone Service Area - Inspection","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)  \nGates Learjet 35 and 36 Series Aeroplanes\n\nAD/LEARJET 35/14\n\nAmdt 1\n\n  \nTailcone Service Area \\- Inspection 12/80\n\nApplicability: All models 35 & 36 not incorporating Mod. Kit No. AMK 80-7.\n\nRequirement: Immediately after the engines are shut down, open the tailcone service area access cover and accomplish the following, using a flashlight or supplemental light as necessary:\n\n    Check the motive flow valves for leaks or stains indicating leaks.\n\n    2. Check all vents and drains to ensure that they are clean and free from obstruction.\n\n    3. Any leaking motive flow valve must be replaced with a new or factory rebuilt valve prior to further flight.\n\n    4. Secure access cover.\n\nNote 1: This inspection may be performed and certified by the pilot in command. Note 2: FAA AD 80-19-09, Amdt. 39-3913 refers.\n\nCompliance: After every flight until modified to AMK 80-7.\n\nBackground: Undetected leakage of flammable fluids in the tailcone service area may, when combined with a source or ignition, result in fire or explosion. Incorporation of modification kit AMK 80-7 will eliminate the requirement for post-flight inspection of this area.","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The amendment preserves the original per‑flight inspection requirement for Learjet 35/36 aircraft without Mod Kit AMK 80-7 and allows PIC certification; the requirement remains until the modification is installed, so the instrument does not broaden or narrow scope in the provided text."},"complexity_factors":["Narrow applicability: only Gates Learjet models 35 & 36 not incorporating Mod Kit AMK 80-7 (Applicability).","Recurring per‑flight requirement increases operational burden for affected aircraft (Compliance: After every flight until modified to AMK 80-7).","Pilot may perform and certify the inspection, lowering need for maintenance personnel but shifting responsibility to flight crew (Note 1).","Mandatory immediate replacement of any leaking motive flow valve before further flight creates a parts/turnaround cost and potential dispatch delay (Requirement 3).","Procedure is simple and visual (use of flashlight/supplemental light), so technical complexity is low but it is safety‑critical (Requirement, Background).","Modification kit AMK 80-7 permanently removes the inspection requirement, creating a one‑time upgrade decision with capital cost versus recurring inspection cost (Background)."],"plain_english_summary":"**What it does:** Requires operators of Gates Learjet 35/36 aircraft that do not have modification AMK 80-7 to open the tailcone access cover immediately after shutdown and inspect motive flow valves, vents and drains for leaks or obstructions; any leaking motive flow valve must be replaced before further flight. The pilot‑in‑command may perform and certify the inspection, and aircraft operators pay for inspections and replacements. The measure aims to detect flammable‑fluid leaks that could lead to fire or explosion."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard Airworthiness Directive maintaining its original narrow scope: addressing a specific fire hazard in specific aircraft models through mandatory post-flight inspections. The amendment appears to be a routine update (Amdt 1) without expansion beyond the original safety purpose."},"complexity_factors":["Single, discrete safety requirement with only 4 procedural steps","No defined terms section or interpretation provisions","Minimal conditional logic (only applicability test: 'not incorporating Mod. Kit No. AMK 80-7')","No cross-references to other legislation (only a reference to equivalent FAA directive in a note)","Short document (approximately 200 words)","Clear compliance trigger ('After every flight until modified')","Single exception/termination condition (modification kit installation)"],"plain_english_summary":"This AD requires pilots of certain Gates Learjet 35/36 airplanes without Mod Kit AMK 80‑7 to perform a post‑flight tailcone check: open the tailcone service panel, inspect fuel valves with a flashlight for leaks or stains, ensure vents/drains are clear, replace any leaking valves before next flight, and secure the panel. The pilot in command may perform and sign off. The checks continue until the modification kit is installed to eliminate fuel‑leak fire/explosion risk."}},"importantCases":[],"_links":{"self":"/api/acts/ad-learjet-35-14-amdt-1-tailcone-service-area-inspection","history":"/api/acts/ad-learjet-35-14-amdt-1-tailcone-service-area-inspection/history","analysis":"/api/acts/ad-learjet-35-14-amdt-1-tailcone-service-area-inspection/analysis","conflicts":"/api/acts/ad-learjet-35-14-amdt-1-tailcone-service-area-inspection/conflicts","importantCases":"/api/acts/ad-learjet-35-14-amdt-1-tailcone-service-area-inspection/important-cases","documents":"/api/acts/ad-learjet-35-14-amdt-1-tailcone-service-area-inspection/documents"}}