{"id":"F2006B10856","name":"AD/INST/51 - Flight Management Computers","slug":"ad-inst-51-flight-management-computers","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":56352,"registerId":"commonwealth-F2006B10856-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"AIRWORTHINESS DIRECTIVE","sectionType":"part","heading":"AIRWORTHINESS DIRECTIVE","content":"# ![](image.001.png)  \nAIRWORTHINESS DIRECTIVE\n\nFor the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.1 (1) of CAR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.\n\n![](image.001.png)\n\nInstruments and Automatic Pilots","sortOrder":0},{"sectionNumber":"AD/INST/51 Flight Management Computers 1","sectionType":"part","heading":"AD/INST/51 Flight Management Computers 13/2002","content":"# AD/INST/51 Flight Management Computers 13/2002\n\nApplicability: Rockwell Collins, Inc. Model FMC-4200, FMC-5000 and FMC-6000 Flight Management Computers (FMC) with the following Model/Part Number combinations:\n\n| Model    | Part Number  |\n| -------- | ------------ |\n| FMC-4200 | 822-0783-002 |\n| FMC-4200 | 822-0783-006 |\n| FMC-4200 | 822-0783-010 |\n| FMC-5000 | 822-0891-001 |\n| FMC-6000 | 822-0868-004 |\n| FMC-6000 | 822-0868-010 |\n| FMC-6000 | 822-0868-021 |\n\nNote 1: The FMC units are known to be installed on, but not limited to the following aircraft models:","sortOrder":1},{"sectionNumber":"Manufacturer","sectionType":"division","heading":"Manufacturer","content":"### Manufacturer\n\nRaytheon Bombardier","sortOrder":2},{"sectionNumber":"Aircraft Model","sectionType":"division","heading":"Aircraft Model","content":"###   \nAircraft Model\n\nBeechjet 400A and 400T (T-1A)\n\nCL-600-2B19 Regional Jet Series 100 and CL-600-2B16 (variant CL-604)","sortOrder":3},{"sectionNumber":"Removed FMC Part Number","sectionType":"part","heading":"Removed FMC Part Number","content":"## Removed FMC Part Number\n\n822-0783-002\n\n822-0783-006\n\n822-0783-010\n\n822-0891-001\n\n822-0868-004\n\n822-0868-010\n\n822-0868-021","sortOrder":4},{"sectionNumber":"Acceptable replacement FMC Part Number","sectionType":"part","heading":"Acceptable replacement FMC Part Number","content":"##   \nAcceptable replacement FMC Part Number\n\n822-0783-011 or 822-0783-013\n\n822-0783-011 or 822-0783-013\n\n822-0783-011 or 822-0783-013\n\n822-0891-005 or 822-0891-008\n\n822-0868-029, 822-0868-030, 822-0868-031 or 822-\n\n0868-032\n\n822-0868-029, 822-0868-030, 822-0868-031 or 822-\n\n0868-032\n\n822-0868-029, 822-0868-030, 822-0868-031 or 822-\n\n0868-032","sortOrder":5}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This AD maintains its original narrow scope. It targets a specific safety issue with specific part numbers of Rockwell Collins FMCs and mandates specific replacement part numbers. There is no evidence of scope creep — the document does not expand beyond its original purpose of mandating hardware replacement for safety reasons."},"complexity_factors":["Very short document (approximately 1 page of substantive content)","No defined terms section — all terminology is industry-standard aviation language","Simple conditional structure: if you have X part number, replace with Y part number","No cross-references to other legislation beyond a single citation to CAR 1998 subregulation 39.1(1)","Clear tabular format for applicability and replacement requirements","Single compliance pathway with no exceptions, exemptions, or alternative methods of compliance described"],"plain_english_summary":"This AD requires mandatory removal and replacement of certain Rockwell Collins Flight Management Computers installed on affected Beechjet and Bombardier aircraft (and any other airplanes with the listed FMCs) to address an identified unsafe condition. \n\nIt’s legally binding: operators must install the specified updated FMC units to restore compliance and maintain airworthiness, or the aircraft cannot be flown."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"The AD changes in-service scope by withdrawing use of the listed FMC part numbers and specifying which replacement part numbers are acceptable for the listed models. That alters which hardware may remain installed and creates an obligation on operators to replace affected FMC units. The AD's applicability includes named aircraft models but explicitly states the list is not exhaustive, widening practical coverage; detailed compliance timing and procedures are referenced but not included in the supplied text."},"complexity_factors":["Legal authority and discretion: issued under subregulation 39.1(1) of CAR 1998 — ADs are mandatory and implemented at the CASA delegate's direction (source header).","Applicability breadth: multiple FMC models and specific part numbers are listed (FMC-4200/5000/6000 with seven part-number entries).","Replacement options: each removed part number has one or several acceptable replacement part numbers, creating procurement/compatibility choices.","Cross-airframe scope: AD notes units are \"known to be installed on, but not limited to\" listed aircraft (Beechjet 400A/400T; CL-600 variants), which expands applicability beyond the enumerated examples.","Operational/compliance burden: requires removal and installation of avionics hardware, implying parts acquisition and specialist maintenance work by operators/maintenance organisations.","Incomplete excerpted mechanics: the AD references requirement and compliance sections (timing and procedural detail) but those particulars are not reproduced here, reducing clarity on deadlines and exact procedures.","Document clarity/formatting: repeated and truncated lines (split part numbers, headings) in the text increase interpretive effort for implementers."],"plain_english_summary":"This Airworthiness Directive requires removal of specific Rockwell Collins FMC-4200/5000/6000 part numbers and installation of designated replacement part numbers on the affected Flight Management Computers. It applies to operators and maintenance organisations of aircraft that use those FMC units (examples include Beechjet 400A/400T and Bombardier CL-600 variants) and matters because operators must replace hardware to address an identified unsafe condition and comply with CASA’s AD instructions."},"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"}},"importantCases":[],"_links":{"self":"/api/acts/ad-inst-51-flight-management-computers","history":"/api/acts/ad-inst-51-flight-management-computers/history","analysis":"/api/acts/ad-inst-51-flight-management-computers/analysis","conflicts":"/api/acts/ad-inst-51-flight-management-computers/conflicts","importantCases":"/api/acts/ad-inst-51-flight-management-computers/important-cases","documents":"/api/acts/ad-inst-51-flight-management-computers/documents"}}