{"id":"F2006B03638","name":"AD/BEECH 1900/20 Amdt 1 - Airstair Door Handle and Latch Housing","slug":"ad-beech-1900-20-amdt-1-airstair-door-handle-and-latch-housing","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43228,"registerId":"commonwealth-F2006B03638-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BEECH 1900/20 Amdt 1 - Airstair Door Handle and Latch Housing","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)  \nBeechcraft 1900 Series Aeroplanes\n\nAD/BEECH 1900/20\n\nAmdt 1\n\n  \nAirstair Door Handle and Latch Housing 7/99\n\nApplicability: Model Serial Numbers 1900 UA-1 through UA-3\n\n1900C UB-1 through UB-74, and UC-1 through UC-174\n\n1900D UE-1 through UE-157\n\nRequirement: Install lubrication fittings in the airstair door handle and latch housing mechanisms in accordance with the Accomplishment Instructions section of either Raytheon Mandatory Service Bulletin (MSB) 2572 Issued July 1996, or Raytheon MSB 2572 Issued July 1996, Revision No.1, May 1998.\n\nNote 1: Only Part II of the Accomplishment Instructions section of the Requirement document(s) applies to the affected Model 1900D aircraft.\n\nNote 2: FAA AD 97-15-13 R2 Amdt 39-11129 refers.\n\nCompliance: Unless already accomplished, within 100 hours time in service after 15 July 1999.\n\nThis Amendment becomes effective on 15 July 1999.\n\nBackground: The actions specified by this Directive are intended to prevent moisture from accumulating and freezing in the airstair door housing, which could result in the door freezing shut and the passengers not being able to evacuate the aircraft in an emergency situation.\n\nAmendment 1 is issued in response to a revision of the related FAA AD which introduces revised applicable service information that corrects the number of required parts and changes an incorrect maintenance manual reference.\n\nThe original issue of this Airworthiness Directive became effective on 6 November 1997.","sortOrder":0}],"analysis":{"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 Amendment does not change the substantive requirement or affected aircraft: it still mandates installing lubrication fittings on the same serial-numbered 1900 models. Amendment 1 updates the referenced service information to correct the number of required parts and a maintenance manual reference and aligns the directive with a revised FAA AD (Amendment 1)."},"complexity_factors":["Narrow applicability by specific model and serial-number ranges (Applicability: Model Serial Numbers 1900 UA-1 through UA-3; 1900C UB-1 through UB-74, UC-1 through UC-174; 1900D UE-1 through UE-157).","Mandatory reference to Raytheon Mandatory Service Bulletin (MSB) 2572, with allowance for either original July 1996 MSB or Revision No.1 May 1998 (Requirement).","Limited exception: only Part II of the Accomplishment Instructions applies to affected 1900D aircraft (Note 1), creating a variant-specific instruction set.","Short compliance window: within 100 hours time in service after 15 July 1999 (Compliance) increases scheduling pressure on operators.","Amendment updates technical details (corrects required parts number and maintenance manual reference), requiring attention to the latest service information (Amendment 1).","Cross-reference to FAA AD 97-15-13 R2 Amdt 39-11129 creates an external regulatory dependency (Note 2 / Background)."],"plain_english_summary":"This Airworthiness Directive requires operators of specified Beechcraft 1900 serial-numbered aircraft to install lubrication fittings in the airstair door handle and latch housing following Raytheon Service Bulletin 2572. The intent is to stop moisture collecting and freezing in the door housing, which could jam the airstair and block evacuation. The work must be done within 100 flight hours from 15 July 1999; aircraft operators pay for parts and labour and must use the specified Raytheon service instructions."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This amendment remains tightly scoped to its original purpose: correcting a specific mechanical defect in airstair door mechanisms on defined Beechcraft 1900 series aircraft. The amendment merely updates technical references and part counts without expanding the aircraft covered or the nature of the required modification."},"complexity_factors":["Very short document (under 300 words)","Only 3 defined applicability ranges (serial number blocks)","Single primary requirement with one exception (Note 1 for Model 1900D)","One cross-reference to FAA AD 97-15-13 R2","No nested conditional logic or exceptions to exceptions","Clear compliance deadline (100 hours time in service after specific date)","Straightforward background explanation of safety rationale"],"plain_english_summary":"This mandatory safety order requires owners/operators of certain Beechcraft 1900-series aircraft to install lubrication fittings on the passenger stairs door handle and latch to prevent water ingress and freezing that could jam the door. It affects specified 1900, 1900C, and 1900D serial-numbered aircraft and must be complied with within 100 flight hours after 15 July 1999.\n\nAmendment 1 updates the original 1997 directive to match revised FAA guidance and corrects parts and maintenance-manual references."}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-1900-20-amdt-1-airstair-door-handle-and-latch-housing","history":"/api/acts/ad-beech-1900-20-amdt-1-airstair-door-handle-and-latch-housing/history","analysis":"/api/acts/ad-beech-1900-20-amdt-1-airstair-door-handle-and-latch-housing/analysis","conflicts":"/api/acts/ad-beech-1900-20-amdt-1-airstair-door-handle-and-latch-housing/conflicts","importantCases":"/api/acts/ad-beech-1900-20-amdt-1-airstair-door-handle-and-latch-housing/important-cases","documents":"/api/acts/ad-beech-1900-20-amdt-1-airstair-door-handle-and-latch-housing/documents"}}