{"id":"F2006B02994","name":"AD/B737/93 - Galley Feeder Wiring","slug":"ad-b737-93-galley-feeder-wiring","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":42353,"registerId":"commonwealth-F2006B02994-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/B737/93 - Galley Feeder Wiring","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 737 Series Aeroplanes\n\nAD/B737/93 Galley Feeder Wiring 10/95\n\nApplicability: This Directive is applicable to all 737-200, \\-300, \\-400 and \\-500 model aircraft equipped with Sabena Technics galleys, Part Numbers as follows:\n\n| 1-8501  | 1-8503  | 1-8504  | 1-9401  | 1-9406  |\n| ------- | ------- | ------- | ------- | ------- |\n| 1-10746 | 1-10805 | 1-10533 | 1-10743 | 1-10747 |\n| 1-10748 | 1-10750 | 1-10751 | 1-10673 | 1-10666 |\n| 1-10749 | 1-10972 | 1-10983 | 1-11162 | 1-11185 |\n| 1-11199 | 1-11200 | 1-11350 | 1-11362 | 1-11363 |\n| 1-11364 | 1-11374 | 1-11380 | 1-11735 |         |\n\nRequirement: 1. Inspect the galley feeder wire bundles for chafing in accordance with Sabena Service Letter SAB 24-001 Revision C dated 27 March 1995, if necessary repair, replace or reposition in accordance with the Sabena Service Letter.\n\n2. Modify the Galley feeder wire bundles in accordance with Sabena Service Letter SAB 24-001 Revision C dated 27 March 1995.\n\nNote: Belgian AD 95-01 dated 25 April 1995 refers.\n\nCompliance: 1. Within 300 hours time in service after 14 September 1995.\n\n2. Within 3600 hours time in service after 14 September 1995.\n\nBackground: A Boeing 737-300 operator reported experiencing smoke and sparks emanating from the ceiling panel above the galley. Investigation revealed that the wire bundle feeding the galley was severed due to melting, which was caused by chafed wiring short circuiting. This Directive provides for early detection of chafing of the wire bundles.","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"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a targeted safety directive addressing a specific wiring defect in specific aircraft configurations. The scope remains precisely limited to the identified safety risk."},"complexity_factors":["Single, specific technical requirement with clear action items","Limited applicability: only 4 aircraft models with specific 29 galley part numbers","No nested exceptions or conditional logic","Only 2 defined compliance timeframes (300 and 3600 hours)","References only one external technical document (Sabena Service Letter SAB 24-001 Rev C)","Straightforward cause-and-effect background explanation"],"plain_english_summary":"This Airworthiness Directive targets Boeing 737-200/-300/-400/-500 aircraft fitted with certain Sabena Technics galley units, requiring inspection of galley electrical wiring for chafing, repair or repositioning if damaged, and a mandatory wiring modification to prevent recurrence. Inspections are due within 300 flight hours and modifications within 3,600 flight hours after 14 September 1995. It follows a smoke-and-sparks incident from chafed wiring and aims to prevent potential in-flight fires."},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"The directive's scope is limited to the listed 737 variants fitted with the specified Sabena Technics galley part numbers and prescribes inspection and modification per the referenced service letter. The text contains no indication that the scope was changed from its original stated intent."},"complexity_factors":["Targeted applicability to specific Boeing 737 models and a long list of Sabena Technics galley part numbers (Applicability) — increases identification and record-checking effort.","Mandated actions reference an external technical document (Sabena Service Letter SAB 24‑001 Rev C) rather than prescribing procedures in-text (Requirement) — requires access to and reliance on vendor instructions.","Two-tiered compliance timetable (inspection within 300 hours; modification within 3,600 hours after 14 Sep 1995) creates scheduling and tracking obligations (Compliance).","Work is safety-critical wiring inspection/repair/modification requiring certified maintenance personnel and possible parts replacement — technical skill and parts supply affect implementation.","Cross-reference to another authority's AD (Belgian AD 95-01) and the incident background ties the directive to specific operational risk facts (Background), increasing procedural scrutiny.","Potential operational costs: aircraft downtime, labour and parts; recordkeeping and proof of compliance for regulators and auditors."],"plain_english_summary":"This directive requires inspection and modification of galley feeder wire bundles on specified Boeing 737‑200/‑300/‑400/‑500 aircraft fitted with listed Sabena Technics galleys, using Sabena Service Letter SAB 24‑001 Revision C (27 Mar 1995). Inspection must find and fix chafing; the modification is a mandated follow-up. Compliance deadlines are inspection within 300 hours and modification within 3,600 hours after 14 Sept 1995. Operators and maintenance organisations bear labour, parts and downtime costs and must follow the external service letter. The measure responds to a reported chafing-induced melt and short circuit that produced smoke and sparks."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b737-93-galley-feeder-wiring","history":"/api/acts/ad-b737-93-galley-feeder-wiring/history","analysis":"/api/acts/ad-b737-93-galley-feeder-wiring/analysis","conflicts":"/api/acts/ad-b737-93-galley-feeder-wiring/conflicts","importantCases":"/api/acts/ad-b737-93-galley-feeder-wiring/important-cases","documents":"/api/acts/ad-b737-93-galley-feeder-wiring/documents"}}