{"id":"F2006B03033","name":"AD/B747/131 - Flap Control Unit Wiring Change","slug":"ad-b747-131-flap-control-unit-wiring-change","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":42392,"registerId":"commonwealth-F2006B03033-current","compilationNumber":null,"startDate":"2026-04-01","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/B747/131 - Flap Control Unit Wiring Change","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)  \nBoeing 747 Series Aeroplanes\n\nAD/B747/131 Flap Control Unit Wiring Change 10/94\n\nApplicability: Model 747-400 aircraft having line numbers 696 through 1019 inclusive and 1021\n\nthrough 1026 inclusive.\n\nRequirement: If not previously accomplished, revise the Flap Control Unit (FCU) input wiring in accordance with Boeing Alert Service Bulletin 747-27A2346 Revision 1 dated\n\n19 May 1994.\n\nNote: FAA AD 94-14-21 Amdt 39-8970 refers.\n\nCompliance: Prior to 1 December 1994.\n\nBackground: The FAA has received reports of disconnection of the Landing Gear Module electrical connectors, this disconnection can result in the loss of the primary, secondary and alternate control of the flaps. Compliance with this Directive decreases the likelihood of an all-up-flaps landing due to the loss of control of all flap operations.","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2982},"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive maintains its original narrow scope, targeting only a specific wiring modification for specific aircraft serial numbers to remedy an identified safety defect."},"complexity_factors":["Incorporation by reference of external technical standard (Boeing Alert Service Bulletin) requiring operators to obtain and interpret separate manufacturer documentation","Aircraft identification using manufacturing line numbers rather than registration marks","Technical aviation terminology (Flap Control Unit, Landing Gear Module, Alert Service Bulletin)","Cross-reference to corresponding FAA Airworthiness Directive"],"plain_english_summary":"This Airworthiness Directive mandates a wiring modification to the Flap Control Unit on Boeing 747‑400 airplanes (line numbers 696–1019 and 1021–1026) per Boeing Alert Service Bulletin 747‑27A2346 Rev 1. It prevents electrical connector disconnection on the Landing Gear Module that could disable all three flap control systems, risking a high‑speed, all‑flaps‑up landing. Compliance was required by 1 December 1994."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b747-131-flap-control-unit-wiring-change","history":"/api/acts/ad-b747-131-flap-control-unit-wiring-change/history","analysis":"/api/acts/ad-b747-131-flap-control-unit-wiring-change/analysis","conflicts":"/api/acts/ad-b747-131-flap-control-unit-wiring-change/conflicts","importantCases":"/api/acts/ad-b747-131-flap-control-unit-wiring-change/important-cases","documents":"/api/acts/ad-b747-131-flap-control-unit-wiring-change/documents"}}