{"id":"F2006B09626","name":"AD/F100/25 - Small Cargo Door Hinge Assembly - 2","slug":"ad-f100-25-small-cargo-door-hinge-assembly-2","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":54402,"registerId":"commonwealth-F2006B09626-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/F100/25 - Small Cargo Door Hinge Assembly - 2","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)  \nFokker F100 (F28 Mk 100) Series Aeroplanes\n\nAD/F100/25 Small Cargo Door Hinge Assembly \\- 2 4/99\n\nApplicability: F.28 Mk.0100, all serial numbers, if equipped with small cargo doors, having hinge assemblies with Part Number (P/N) A28410-405, A28410-407 and/or D28410-409 installed.\n\nRequirement: 1. Check the aircraft maintenance records and establish the total number of flights for each affected small cargo door hinge assembly, having either P/N A28410-405, A28410-407 or D28410-409.\n\n2. Perform a detailed inspection of the affected small cargo door hinge assemblies in accordance with the applicable Fokker 70/100 Non-Destructive Testing (NDT) Manual, Part 6, Procedure 52-30-01.\n\nIf cracks are found then repair in accordance with a Fokker developed repair scheme.\n\nNote: RLD BLA 1996-125/2 refers.\n\nCompliance: 1. Prior to 22 May 1999.\n\n2. Inspect before each affected small cargo door hinge assembly accumulates 8,000 flight cycles since new or before 22 May 1999, whichever occurs later.\n\nNote: If the number of flight cycles cannot be established, then inspect before 22 May 1999.\n\nThereafter inspect at intervals not exceeding 8,000 flight cycles.\n\nAll repairs to the cargo door hinge are to be incorporated before further flight. This Airworthiness Directive becomes effective on 22 April 1999.\n\nBackground: During scheduled visual inspections on several F.28 Mk.0100 aircraft, fatigue cracks were found in the hinges of the small cargo doors. These cracks occurred earlier than anticipated. This AD requires the introduction of a repetitive detailed inspection of the affected cargo door hinges.","sortOrder":0}],"analysis":{"flash_summary_failed":{"failed":true,"reason":"Unauthenticated. Configure AI_GATEWAY_API_KEY or use a provider module. Learn more: https://ai-sdk.dev/unauthenticated-ai-gateway","source":"analysis-cron"},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive does not expand applicability beyond the specified hinge part numbers. It introduces a repetitive detailed inspection regime and mandates OEM‑specified repairs in response to earlier-than-expected fatigue cracks; the instrument therefore alters maintenance frequency and repair obligations rather than widening the population of affected aircraft."},"complexity_factors":["Narrow applicability: applies only to F.28 Mk.0100 aircraft with hinge P/N A28410-405, A28410-407 or D28410-409 (Applicability).","Record-keeping requirement: operators must establish total flight cycles from maintenance records for each affected hinge assembly (Requirement 1).","Technical inspection standard: inspections must follow Fokker 70/100 NDT Manual, Part 6, Procedure 52-30-01, creating dependency on OEM procedures (Requirement 2).","Repair dependency: detected cracks must be repaired in accordance with a Fokker-developed repair scheme, shifting technical authority to the manufacturer (Requirement 2).","Timing rules: an initial compliance date (22 May 1999), cycle-based inspection threshold (8,000 flight cycles) and a fallback if cycles are unknown add scheduling complexity (Compliance).","Operational impact: all repairs must be incorporated before further flight, which necessitates scheduling adjustments and potential downtime (Compliance).","Traceability risk: incomplete flight-cycle records trigger the date-based fallback, increasing uncertainty and potential for ad hoc compliance measures (Compliance/Note)."],"plain_english_summary":"This directive requires operators of Fokker F100 (F28 Mk 100) aeroplanes fitted with small cargo door hinges P/N A28410‑405, A28410‑407 or D28410‑409 to record flight cycles, perform detailed non‑destructive inspections, and repair any cracks. Inspections must occur before 8,000 flight cycles (or by 22 May 1999 if cycles are unknown) and thereafter at intervals not exceeding 8,000 cycles; all repairs are required before further flight, which necessitates scheduling adjustments. The measure responds to fatigue cracks found earlier than expected in service."},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This AD maintains its original narrow scope — addressing a specific fatigue cracking issue in specific hinge part numbers on Fokker F100 aircraft. It has not expanded beyond its original safety purpose."},"complexity_factors":["Single, specific mechanical issue (cargo door hinges) with limited applicability (three specific part numbers)","Clear, sequential compliance requirements with specific deadlines","Only one cross-reference (to Fokker NDT Manual Part 6, Procedure 52-30-01)","Simple conditional logic: 'if cracks found, then repair'","Short document (approximately 250 words) with minimal defined terms","No nested exceptions or complex definitional sections"],"plain_english_summary":"This CASA Airworthiness Directive mandates that operators of Fokker F100 (F.28 Mk.0100) jets with three specified small-cargo-door hinge part numbers must check records, inspect those hinges using the required non‑destructive test, and repair any cracks with an approved Fokker scheme before further flight. Inspections were first due by 22 May 1999 and must be repeated every 8,000 flight cycles. The AD addresses premature fatigue cracking that could cause door failure in flight."}},"importantCases":[],"_links":{"self":"/api/acts/ad-f100-25-small-cargo-door-hinge-assembly-2","history":"/api/acts/ad-f100-25-small-cargo-door-hinge-assembly-2/history","analysis":"/api/acts/ad-f100-25-small-cargo-door-hinge-assembly-2/analysis","conflicts":"/api/acts/ad-f100-25-small-cargo-door-hinge-assembly-2/conflicts","importantCases":"/api/acts/ad-f100-25-small-cargo-door-hinge-assembly-2/important-cases","documents":"/api/acts/ad-f100-25-small-cargo-door-hinge-assembly-2/documents"}}