{"id":"F2006B02405","name":"AD/AMD 50/9 - Electrical Power","slug":"ad-amd-50-9-electrical-power","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41648,"registerId":"commonwealth-F2006B02405-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/AMD 50/9 - Electrical Power","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)  \nAMD Falcon 50 and 900 Series Aeroplanes\n\nAD/AMD 50/9 Electrical Power 13/95\n\nApplicability: This Directive is applicable to Mystere-Falcon 900 series aeroplanes, serial numbers 53 through 139 inclusive, equipped with a Fairchild Model F800 Flight Data Recorder (FDR), installed in accordance with United States Federal Aviation Administration (FAA) Supplemental Type Certificate SA7255SW-D.\n\nRequirement: 1. Modify the electrical power installation for the FDR in accordance with paragraph 3.C.(1), Part 900-54-1, of Falcon Jet Corporation Service Bulletin 900-54 (F900 31-1) Revision 1 dated 17 November 1994. Then prior to further flight, subsequent to incorporation of this modification, perform the checks and test in accordance with paragraph 3.D.(1), Part 900-54-1, of the same service bulletin.\n\n2. Replace the currently installed ground power socket box with a reworked socket box in accordance with paragraph 3.C.(2), Part 900-54-2, of Falcon Jet Corporation Service Bulletin 900-54 (F900 31-1) Revision 1 dated 17 November 1994. Then prior to further flight, subsequent to accomplishment of this installation, perform the checks and test in accordance with paragraph 3.D.(2), Part 900-54-2, of the same service bulletin.\n\nNote: FAA AD 95-19-16 Amdt 39-9378 refers.\n\nCompliance: For Requirement 1 \\- At the next scheduled inspection, but no later than 7 February 1996.\n\nFor Requirement 2 \\- Prior to 7 December 1996.\n\nBackground: Action required by this Directive is prompted by reports to the FAA indicating that generators may shut down due to an intermittent relay failure of the FDR and is intended to prevent loss of electrical power to the aeroplane due to generator outage.","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"Scope is confined to Mystere‑Falcon 900 series serial numbers 53–139 fitted with the Fairchild F800 FDR under STC SA7255SW-D and prescribes two specific modifications and associated tests by set deadlines; there is no indication in the instrument text that the applicability or core requirements were expanded beyond that intent."},"complexity_factors":["Technical electrical and FDR-specific modifications require qualified maintenance personnel and access to the Service Bulletin procedures","Directive cross-references specific paragraphs and revision of Falcon Jet Service Bulletin 900-54, requiring precise conformity","Applicability limited to defined serial numbers and aircraft fitted under a particular FAA STC, necessitating record checks","Two separate mandated actions with different compliance deadlines","Mandatory post-installation functional checks before further flight increase operational disruption and inspection coordination","Safety-critical context increases regulatory and operator scrutiny of workmanship and testing"],"plain_english_summary":"Requires modification of the flight data recorder (FDR) electrical power installation and replacement of the ground power socket box on Mystere‑Falcon 900 series aeroplanes (serials 53–139) fitted with a Fairchild F800 FDR, carried out per Falcon Jet Service Bulletin 900‑54 Revision 1, with functional checks required before further flight. The Directive says the work prevents generator shutdown caused by an intermittent FDR relay failure reported to the FAA. Costs, downtime and compliance testing fall on aircraft owners/operators and must meet the specified deadlines."},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This is a discrete, time-bound safety directive addressing a specific technical fault in specific aircraft. It has not expanded beyond its original purpose of preventing generator failure in Falcon 900 series aircraft equipped with the identified flight data recorder."},"complexity_factors":["Short, single-purpose directive with only 2 requirements","Minimal defined terms (only 'FDR' is abbreviated, and it's explained)","Clear, sequential structure with explicit deadlines","References to external technical documents (FAA directive and manufacturer service bulletin) but provides specific paragraph citations","No nested exceptions or conditional logic — straightforward 'do X by Y date' format","Limited cross-referencing (only one FAA AD mentioned in a note)"],"plain_english_summary":"This CASA Airworthiness Directive requires owners/operators of Mystere-Falcon 900 series (S/N 53–139) fitted with a certain Fairchild flight data recorder to carry out two mandatory modifications to eliminate an intermittent relay fault that can shut down generators and cause total electrical loss. \n\nThe fixes—rewiring the FDR power feed (due 7 Feb 1996) and replacing the ground power socket box (due 7 Dec 1996)—are required to prevent potentially catastrophic in-flight electrical failure."},"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"}},"importantCases":[],"_links":{"self":"/api/acts/ad-amd-50-9-electrical-power","history":"/api/acts/ad-amd-50-9-electrical-power/history","analysis":"/api/acts/ad-amd-50-9-electrical-power/analysis","conflicts":"/api/acts/ad-amd-50-9-electrical-power/conflicts","importantCases":"/api/acts/ad-amd-50-9-electrical-power/important-cases","documents":"/api/acts/ad-amd-50-9-electrical-power/documents"}}