{"id":"F2008L03399","name":"AD/BEECH 77/16 - Circuit Breaker Toggle Switches","slug":"ad-beech-77-16-circuit-breaker-toggle-switches","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":120388,"registerId":"commonwealth-F2008L03399-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Beechcraft 77 (Skipper) Series Aeroplane","sectionType":"division","heading":"Beechcraft 77 (Skipper) Series Aeroplanes","content":"### Beechcraft 77 (Skipper) Series Aeroplanes\n\n| AD/BEECH 77/16 | Circuit Breaker Toggle Switches | 10/2008 |\n| -------------- | ------------------------------- | ------- |\n\n```html\n

Applicability:

Aeroplane models and serial numbers listed in Table 1 that have any circuit breaker toggle switch with a part number (P/N) 35-380132-1 through 35-380132-53 installed.

Table 1

Model

Serial Number Range

77

WA-1 through WA-312

Requirement:

1. Unless previously accomplished, replace all circuit breaker toggle switches P/N 35-380132-1 through 35-380132-53 with an improved circuit breaker toggle switch, P/N 35-380132-61 through 35-380132-113, as applicable, as specified in Raytheon Aircraft Company (RAC) Recommended Service Bulletin SB 24-3735, Issued: August 2005.

2. Circuit breaker toggle switches P/N 35-380132-1 through 35-380132-53 may not be installed on any aeroplane as an initial fit or as a replacement spare.

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 2008-13-17, are considered acceptable for compliance with the equivalent Requirements of this Directive.

Note: FAA AD 2008-13-17 Amdt 39-15580 refers.

Compliance:

For Requirement 1 - Within the next 24 months after the effective date of this Directive.

For Requirement 2 - Before further flight after the circuit breaker toggle switch has been replaced in accordance with Requirement 1.

This Airworthiness Directive becomes effective on 25 September 2008.

Background:

The FAA has received reports of certain circuit breaker toggle switches used in various electrical systems throughout Beech F33, F33A, F33C, G33, V35B, A36, A36TC, B36TC, 95-B55, D55, E55, A56TC, 58, 58P, 58TC, G58 and 77 model aeroplanes overheating. Failure of the circuit breaker toggle switch could result in smoke in the cockpit and the inability to turn off the switch.

\n```\n\n| | This Directive follows the intent of the FAA Directive, requiring the replacement of circuit breaker toggle switches with a P/N 35-380132-1 through 35-380132-53. However, it is revised to allow prior accomplishment, as the RAC service bulletin was issued in 2005 and may have already been accomplished. The Directive also extends compliance by 13 months until 25 September 2010, the final compliance time required by the FAA was 6 August 2009. |\n| --- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| | A draft version of this Directive was posted for public comment on the Civil Aviation Safety Authority (CASA) internet site on 9 July 2008. As of the date that this Directive was made, no comments or objections have been received by CASA. |\n\n![](image.001.png)\n\nJames Coyne \nDelegate of the Civil Aviation Safety Authority\n\n8 August 2008","sortOrder":0},{"sectionNumber":"AD/BEECH 77/16","sectionType":"part","heading":"AD/BEECH 77/16","content":"## AD/BEECH 77/16","sortOrder":1},{"sectionNumber":"Circuit Breaker Toggle Switches","sectionType":"part","heading":"Circuit Breaker Toggle Switches","content":"## Circuit Breaker Toggle Switches","sortOrder":2},{"sectionNumber":"10/2008","sectionType":"part","heading":"10/2008","content":"## 10/2008","sortOrder":3}],"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":3,"scope_assessment":{"changed":false,"description":"This AD maintains its original narrow scope — addressing a specific safety defect in a single aircraft type. The document explicitly states it follows the FAA's intent while adding sensible flexibilities (prior accomplishment credit, extended compliance time). No scope creep is evident; it remains tightly focused on the circuit breaker switch defect."},"complexity_factors":["Single, clearly defined applicability (one aircraft model with specific serial number range)","Two straightforward requirements with clear deadlines","References to external technical documents (FAA AD 2008-13-17 and Raytheon Service Bulletin SB 24-3735) that must be consulted for full compliance details","Part number ranges (35-380132-1 through -53 and -61 through -113) require careful cross-checking against aircraft records","Conditional exception for 'prior accomplishment' requires verification of previous maintenance against 2005 service bulletin","Nested compliance timeline (24 months from effective date, with effective date specified separately)"],"plain_english_summary":"This AD requires owners/operators of Beechcraft 77 (Skipper) aeroplanes (s/n WA‑1 to WA‑312) to replace overheating circuit breaker toggle switches (old PN 35‑380132‑1–53) with improved units (PN 35‑380132‑61–113) per SB 24‑3735. \n\nAction must be done within 24 months of the AD (recognises prior SB‑compliant replacements) and the old switches are thereafter prohibited even as spares. The measure prevents cockpit smoke/fire and loss of ability to isolate electrical power."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"CASA followed the FAA AD’s substantive requirement to replace the specified circuit breaker toggle switches but revised timing and prior‑accomplishment treatment. The Directive recognises prior completion of RAC SB 24‑3735 and extends the compliance window to 24 months after the Directive’s effective date (to 25 September 2010), which is 13 months later than the FAA’s final compliance date (6 August 2009). The list of affected models, serials and part‑numbers was not expanded; FAA‑approved SB revisions remain acceptable as AMOCs."},"complexity_factors":["Precise technical scope defined by multiple part‑number ranges (old P/Ns 35‑380132‑1–53; new P/Ns 35‑380132‑61–113).","Applicability limited to a specific model and serial number range (77 model, WA‑1 through WA‑312).","Cross‑reference to an external manufacturer Service Bulletin (RAC SB 24‑3735) as the method of compliance.","Acceptance of later Service Bulletin revisions only if FAA‑approved as an AMOC (interaction with FAA processes).","Two compliance requirements with different timing and an installation prohibition (replacement within 24 months; no reinstallation as spare).","Adjustment to the FAA timeline (CASA extended compliance), creating a divergence to track between regulators."],"plain_english_summary":"This Airworthiness Directive requires owners/operators of Beechcraft 77 aeroplanes (serial WA‑1 through WA‑312) that have circuit breaker toggle switches P/N 35‑380132‑1 through ‑53 to replace them with improved switches P/N 35‑380132‑61 through ‑113 per Raytheon RAC Service Bulletin SB 24‑3735 within 24 months. It also prohibits installing the older P/Ns as initial fits or replacement spares. Owners/operators pay for replacements; CASA enforces compliance. The measure responds to FAA reports of overheating, smoke and inoperable switches."}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-77-16-circuit-breaker-toggle-switches","history":"/api/acts/ad-beech-77-16-circuit-breaker-toggle-switches/history","analysis":"/api/acts/ad-beech-77-16-circuit-breaker-toggle-switches/analysis","conflicts":"/api/acts/ad-beech-77-16-circuit-breaker-toggle-switches/conflicts","importantCases":"/api/acts/ad-beech-77-16-circuit-breaker-toggle-switches/important-cases","documents":"/api/acts/ad-beech-77-16-circuit-breaker-toggle-switches/documents"}}