{"id":"F2008L00177","name":"AD/BEECH 400/29 - Galley Electrical Power Circuit Wiring","slug":"ad-beech-400-29-galley-electrical-power-circuit-wiring","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":72361,"registerId":"commonwealth-F2008L00177-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Beechcraft 400 Series Aeroplanes","sectionType":"division","heading":"Beechcraft 400 Series Aeroplanes","content":"### Beechcraft 400 Series Aeroplanes\n\n| AD/BEECH 400/29 | Galley Electrical Power Circuit Wiring | 2/2008 |\n| --------------- | -------------------------------------- | ------ |\n\n| Applicability: | Hawker Beechcraft Model 400A series aeroplanes, identified in Raytheon Service Bulletin SB 25-3758, dated June 2006.                                                                                                                                                |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | 1. Carry out the following inspections in accordance with the Accomplishment Instructions of SB 25-3758:                                                                                                                                                            |\n|                | a. Inspect the galley cabinets to determine if a Precision Pattern galley cabinet, part number (P/N) 20917, 20918 or 20921 is installed, and                                                                                                                        |\n|                | b. If the Requirement 1.a. inspection determines that a galley P/N 20917, 20918 or 20921 is installed, inspect the galley electrical power circuit to determine if 8AWG (American Wire Gauge) wire is used.                                                         |\n|                | 2. Following the Requirement 1 inspection, carry out all applicable related investigative and corrective actions in accordance with the Accomplishment Instructions of SB 25-3758.                                                                                  |\n|                | Note 1: SB 25-3758, refers to Raytheon Kit 128-3068-0001, Revision 3, dated 18 April 2006, as an additional source of service information for replacing the undersized 10AWG wire with 8AWG wire in the gallery power circuit.                                      |\n|                | Later revisions of the above SB, approved by the United States Federal Aviation Administration (FAA) as an Alternate Method of Compliance (AMOC) to FAA AD 2007-24-01, are considered acceptable for compliance with the equivalent Requirements of this Directive. |\n|                | Note 2: FAA AD 2007-24-01 Amdt 39-15267 refers.                                                                                                                                                                                                                     |\n| Compliance:    | For Requirement 1 - Within 200 hours time in service (TIS) or 12 months, whichever occurs first, after the effective date of this Directive,                                                                                                                        |\n|                | For Requirement 2 - Within 20 hours TIS or 30 days, whichever occurs later, after the Requirement 1 inspection.                                                                                                                                                     |\n|                | This Airworthiness Directive becomes effective on 14 February 2008.                                                                                                                                                                                                 |\n\n| Background: | The FAA has received reports of undersized, and consequently unprotected, wire in the galley cabinets. The use of these wires could result in overheating of wire insulation and consequent fire or smoke in the aeroplane cabin. |\n| ----------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|             | This Directive requires inspecting the galley cabinets to determine if a certain part number is installed or if a certain size of wire already exists and, if necessary, accomplishing related investigative/corrective actions.  |\n\n![](image.001.png)  \nCharles Lenarcic  \nDelegate of the Civil Aviation Safety Authority\n\n21 December 2007","sortOrder":0},{"sectionNumber":"AD/BEECH 400/29","sectionType":"part","heading":"AD/BEECH 400/29","content":"## AD/BEECH 400/29","sortOrder":1},{"sectionNumber":"Galley Electrical Power Circuit Wiring","sectionType":"part","heading":"Galley Electrical Power Circuit Wiring","content":"## Galley Electrical Power Circuit Wiring","sortOrder":2},{"sectionNumber":"2/2008","sectionType":"part","heading":"2/2008","content":"## 2/2008","sortOrder":3}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This AD maintains its original narrow scope — addressing a specific wiring safety defect in specific Beechcraft aircraft. It has not expanded beyond its original purpose of mandating inspection and correction of undersized galley electrical wiring."},"complexity_factors":["Single, clearly defined applicability (one aircraft model series)","Straightforward two-step requirement structure (inspect, then act if needed)","Only 3 specific part numbers to identify","Single technical reference document (Service Bulletin SB 25-3758)","Simple conditional logic (if X found, then check Y; if Y problem found, then fix)","Clear compliance deadlines with simple 'whichever occurs first/later' conditions","No nested definitions, cross-references to other legislation, or interpretive provisions","Background section provides clear safety rationale"],"plain_english_summary":"This mandatory CASA Airworthiness Directive requires owners/operators of Hawker Beechcraft Model 400A aeroplanes to inspect galley cabinets (specific part numbers) and verify wiring is 8AWG; if undersized wiring is found, repairs or replacements must follow the manufacturer’s instructions. It responds to FAA reports of undersized wires that can overheat and cause in-flight fire/smoke. Inspections and corrective actions must meet specified short compliance deadlines."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The Directive sticks closely to its stated safety purpose—identifying undersized galley wiring and mandating inspection and corrective action. It does not broaden regulatory scope beyond the original safety objective (electrical circuit wiring in specified galley cabinets) and relies on the SB and kit for the technical remedy. Cross-references to FAA AD material and acceptance of later SB revisions are procedural links rather than an expansion of substantive scope."},"complexity_factors":["Short document with two substantive Requirements (inspect, then investigate/correct)","Three specific galley part numbers to check (P/N 20917, 20918, 20921)","A single technical criterion for wiring (8 AWG vs undersized 10 AWG)","Clear and short compliance windows (200 hours/12 months; 20 hours/30 days)","Cross-references to Raytheon SB 25-3758 and Raytheon Kit 128-3068-0001 Rev 3","Reference to FAA AD 2007-24-01 and acceptance of later SB revisions as FAA-approved AMOC (adds a limited external dependency)"],"plain_english_summary":"**What this instrument does (mechanically)\n\n- Requires operators of Hawker Beechcraft Model 400A series aeroplanes identified in Raytheon Service Bulletin (SB) 25-3758 (June 2006) to carry out inspections and any follow-up repairs described in that Service Bulletin.\n- Requirement 1: Inspect galley cabinets to see whether a Precision Pattern galley cabinet with part number 20917, 20918 or 20921 is installed. If one of those galley part numbers is present, inspect the galley electrical power circuit to check whether the wire is 8 AWG (American Wire Gauge) or a smaller (undersized) gauge.\n- Requirement 2: If the inspections identify undersized wiring or other issues, complete all investigative and corrective actions described in the Accomplishment Instructions of SB 25-3758. The SB also identifies Raytheon Kit 128-3068-0001 (Revision 3, 18 April 2006) as a source for replacing undersized 10 AWG wire with 8 AWG wire.\n- Compliance times: the initial inspection (Requirement 1) must be done within 200 flight hours or 12 months (whichever is first) from the effective date of the Directive. Any related investigative/corrective actions (Requirement 2) must be done within 20 flight hours or 30 days (whichever is later) after the Requirement 1 inspection.\n\n**Who this affects\n\n- Owners and operators of Hawker Beechcraft Model 400A aeroplanes that are listed in Raytheon SB 25-3758.\n- Maintenance organisations and engineers who carry out inspections and wiring repairs on those aeroplanes.\n\n**Why it matters (official rationale and practical effect)\n\n- The Civil Aviation Safety Authority (via reference to FAA reports) required the action because undersized wiring found in the galley cabinets can overheat, damage insulation, and create a risk of fire or smoke in the cabin. The Directive implements a mandatory check-and-fix regime to reduce that hazard.\n\n**Costs, incentives and trade-offs (mechanical effects on operators and the maintenance market)\n\n- Who pays: aircraft owners/operators pay for the inspection labour and for any corrective wiring work or parts (for example, installing 8 AWG wire or fitting the Raytheon kit cited by the SB).\n- Who decides: the operator must decide to schedule the required inspections and, if problems are found, arrange corrective work to the SB's instructions (or an FAA‑approved alternate method of compliance where noted). A licensed maintenance organisation will carry out the work and certify the aircraft.\n- Behavioural change: operators will prioritise inspecting galleys identified by the SB within the specified compliance window and will replace undersized wiring where required. This can lead to short-term maintenance workload increases for MRO providers servicing affected fleets.\n- Costs vs benefits: the immediate cost is inspection time and potential rewiring; the intended benefit is reduced risk of in-flight cabin fire or smoke from galley circuits. The Directive channels corrective work to a specific Service Bulletin and an identified kit, which concentrates demand for particular parts and procedures.\n- Competitive and market effects: maintenance and parts demand is concentrated on providers who supply the Raytheon kit or who are approved to perform the SB instructions. Independent maintenance shops can compete if they follow the SB or an approved alternative, but operators may prefer suppliers who already stock the kit or have prior experience, creating a short-run advantage for those suppliers.\n- Compliance and implementation risk: the AD relies on correct identification of the galley P/Ns and accurate inspection of wire gauge. Mis-identification could cause unnecessary work or missed defects. The SB and kit provide the technical remedy; effective implementation depends on operator maintenance records and technician competence.\n- Opportunity cost: time and budget spent on these inspections and wiring replacements are time and budget not spent on other maintenance or upgrades. For operators with large fleets, aggregate maintenance scheduling will need adjustment.\n\n**Notes on regulatory detail and alternatives\n\n- The AD accepts later revisions of SB 25-3758 that the FAA has approved as an Alternate Method of Compliance (AMOC) to FAA AD 2007-24-01. That gives operators a limited route to comply using subsequently approved SB revisions rather than the exact edition stated.\n- The Directive cross-references FAA AD 2007-24-01 and a Raytheon kit (128-3068-0001 Rev 3), which operators and maintainers should consult for the technical steps and parts required.\n\n**Who benefits and who bears the cost\n\n- Concentrated benefit: individual aircraft and their operators benefit from reduced risk of galley-circuit fire.\n- Diffuse cost: the fleet operators (owners) bear the inspection and repair costs and the disruption to maintenance schedules.**"},"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"}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-400-29-galley-electrical-power-circuit-wiring","history":"/api/acts/ad-beech-400-29-galley-electrical-power-circuit-wiring/history","analysis":"/api/acts/ad-beech-400-29-galley-electrical-power-circuit-wiring/analysis","conflicts":"/api/acts/ad-beech-400-29-galley-electrical-power-circuit-wiring/conflicts","importantCases":"/api/acts/ad-beech-400-29-galley-electrical-power-circuit-wiring/important-cases","documents":"/api/acts/ad-beech-400-29-galley-electrical-power-circuit-wiring/documents"}}