{"id":"F2005L02069","name":"AD/CESSNA 180/87 - Main Electrical Power Junction Box","slug":"ad-cessna-180-87-main-electrical-power-junction-box","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":36264,"registerId":"commonwealth-F2005L02069-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Cessna 180, 182 and Wren 460 Series Aero","sectionType":"division","heading":"Cessna 180, 182 and Wren 460 Series Aeroplanes","content":"### Cessna 180, 182 and Wren 460 Series Aeroplanes\n\n| AD/CESSNA 180/87 | Main Electrical Power Junction Box | 9/2005 |\n| ---------------- | ---------------------------------- | ------ |\n\n```html\n

Applicability:

Cessna Model 182T and T182T aeroplanes as follows:

Model

Serial Numbers

182T

T182T

18281242 through 18281502, 18281506 and 18281507
T18208212 through T18208357

Requirement:

1. Unless already accomplished, inspect any MC01-3A I.C. 9 (part number (P/N) S3100-297) or MC01-3A I.C. 10 (P/N S3100-344) main electrical power junction box for any incorrect amperage (amp) circuit beaker installed in place of the required 40-amp circuit breakers in accordance with Cessna Service Bulletin (SB) SB05-24-01 dated 31 January 2005.

2. Replace any incorrect amp circuit breaker found during the Requirement 1 inspection with the required 40-amp circuit breaker in accordance with
SB05-24-01.

3. Only 40-amp circuit breakers may be installed as spares in any MC01-3A I.C. 9 or MC01-3A I.C. 10 main electrical power junction box.

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 2005-13-10, are considered acceptable for compliance with the equivalent Requirements of this Directive.

Note: FAA AD 2005-13-10 Amdt 39-14147 refers.

Compliance:

For Requirement 1 - Within the next 30 days after the effective date of this Directive.

For Requirement 2 - Before further flight after the Requirement 1 inspection.

For Requirement 3 - As of the effective date of this Directive.

This Airworthiness Directive becomes effective on 1 September 2005.

\n```\n\n| Background: | The FAA has received several reports of circuit breakers that are not the correct 40-amp circuit breaker installed in the MC01-3A main electrical power junction box. Incorrectly rated circuit breakers could result in premature tripping of the power junction box main feeder circuit breakers and could lead to partial or complete loss of all electrical power on the airplane. |\n| ----------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| | This Directive requires the inspection of the main electrical power junction box and, if necessary, the replacement of any incorrect circuit breaker |\n\n![](image.001.png) \nDavid Villiers \nDelegate of the Civil Aviation Safety Authority\n\n22 July 2005","sortOrder":0},{"sectionNumber":"AD/CESSNA 180/87","sectionType":"part","heading":"AD/CESSNA 180/87","content":"## AD/CESSNA 180/87","sortOrder":1},{"sectionNumber":"Main Electrical Power Junction Box","sectionType":"part","heading":"Main Electrical Power Junction Box","content":"## Main Electrical Power Junction Box","sortOrder":2},{"sectionNumber":"9/2005","sectionType":"part","heading":"9/2005","content":"## 9/2005","sortOrder":3}],"analysis":{"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"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard, targeted Airworthiness Directive addressing a specific manufacturing defect. The scope remains tightly focused on the identified safety issue with the main electrical power junction box in the specified Cessna models. There is no evidence of scope creep beyond the original safety purpose."},"complexity_factors":["Single, specific technical issue (circuit breaker rating)","Only 2 aircraft models affected with clearly defined serial number ranges","Three straightforward requirements: inspect, replace if needed, use correct spares","Minimal cross-referencing (only to Cessna Service Bulletin SB05-24-01 and FAA AD 2005-13-10)","Clear compliance deadlines with no conditional exceptions or nested logic","No defined terms section or interpretation provisions"],"plain_english_summary":"This CASA Airworthiness Directive requires owners/operators of certain 2005‑era Cessna 182T/T182T aeroplanes to inspect the main electrical power junction box and replace any incorrectly fitted circuit breakers. Incorrect (non‑40‑amp) breakers may trip and cause total electrical failure; aircraft must be grounded until incorrect breakers are replaced with proper 40‑amp units, and only 40‑amp spares may be used going forward. This prevents in‑flight loss of critical radios, navigation, lighting and instruments."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"This directive remains narrowly focused on correcting incorrectly rated circuit breakers in the MC01-3A main electrical junction box for the listed aircraft serial numbers. The only broadening element is the allowance that later revisions of the referenced Cessna service bulletin, if approved by the U.S. FAA as an Alternate Method of Compliance, are acceptable for compliance; this expands acceptable technical methods but does not change the directive's substantive scope or obligations (inspect, replace, restrict spares)."},"complexity_factors":["Limited applicability: only Cessna 182T and T182T with specific serial number ranges (low scope).","Three core, sequential requirements (inspect, replace if necessary, restrict spares) — simple linear logic.","Short, concrete compliance deadlines: 30 days for inspection; replacement before further flight; spares rule effective immediately.","One external technical reference required: Cessna Service Bulletin SB05-24-01 (with FAA‑approved later revisions acceptable) — single cross‑reference.","Few technical items and defined parts: MC01-3A I.C. 9 / I.C. 10 junction box, P/Ns S3100-297 and S3100-344, and 40‑amp circuit breakers.","Minor conditionality only (action required if incorrect breaker found) — no nested exceptions or multiple layers of discretion."],"plain_english_summary":"**What this directive does (mechanically):**\n\n- Applies to Cessna Model 182T and T182T aeroplanes with the specific serial numbers listed in the Applicability section. (See \"Applicability\".)\n- Requires an inspection of the main electrical power junction box (MC01-3A I.C. 9 or MC01-3A I.C. 10, P/N S3100-297 or P/N S3100-344) to check whether the installed main feeder circuit breakers are the correct 40-amp devices (Requirement 1).\n- If any incorrect (wrong‑rated) circuit breaker is found, it must be replaced with the required 40‑amp circuit breaker before the aeroplane next flies (Requirement 2).\n- From the effective date onward, only 40‑amp circuit breakers may be used as spares in those junction boxes (Requirement 3).\n- Compliance must follow Cessna Service Bulletin SB05-24-01 (or later revisions approved by the U.S. FAA as an Alternate Method of Compliance) (AMOC note).\n\n**Why the regulator says this is needed (official rationale):**\n\n- The FAA reported several cases where circuit breakers installed in that junction box were not the correct 40‑amp rating. The FAA’s stated safety concern is that incorrectly rated breakers could trip prematurely and cause partial or complete loss of electrical power on the airplane (Background / FAA claim).\n\n**Who is affected and who pays:**\n\n- Aircraft owners/operators of the listed Cessna 182T and T182T aeroplanes (Applicability) must arrange and pay for the inspection and any corrective work. Maintenance organisations or licensed mechanics perform the work, using the Cessna service bulletin as the technical method.\n\n**What behaviour changes are required:**\n\n- Inspect the specified junction boxes within 30 days of the directive’s effective date (Compliance for Requirement 1).\n- Replace any incorrect breaker found before further flight (Compliance for Requirement 2).\n- Do not carry or install spare circuit breakers other than 40‑amp devices in those junction boxes from the effective date (Requirement 3).\n\n**Implementation, costs and trade-offs (testing the official safety claim against practical effects):**\n\n- Direct costs: time for inspection, labour to replace any non‑conforming breakers, and the cost of replacement parts where needed (Requirement 1 and 2). Owners/operators bear these costs.\n- Operational impact: aircraft with incorrect breakers must be grounded until the incorrect parts are replaced (Requirement 2: \"Before further flight\"), creating potential short‑term disruption and opportunity cost for operators.\n- Compliance mechanism: the directive requires following Cessna SB05-24-01; later FAA‑approved revisions of that SB are also acceptable (AMOC note). This channels technical compliance through the manufacturer’s instructions, which reduces discretion but concentrates the method to a known procedure.\n- Parts and supply: restricting spares to only 40‑amp breakers (Requirement 3) reduces acceptable spare variety and creates demand for the correct part. If the correct part is scarce, supply delays could extend aircraft downtime.\n- Enforcement and record‑keeping: maintenance records must reflect the inspection and any replacements. Misidentification of breakers or poor record keeping are implementation risks.\n- Distribution of costs and benefits: the cost burden is concentrated on individual owners/operators; the safety benefit is diffuse (affects all who fly the aircraft). The directive does not create subsidies or compensation.\n- Market effects: independent maintenance providers will experience demand for inspection and replacement work; suppliers of the specified 40‑amp breakers may see increased demand. The directive does not change ownership, competitive entry, pricing rules, or contractual freedoms beyond requiring a particular part and procedure for compliance.\n\n**Decision authority and discretion:**\n\n- The Civil Aviation Safety Authority (through its delegate) issued the directive; compliance is required of operators of the listed aircraft. Alternate compliance methods are possible only where later revisions of the Cessna service bulletin have been approved by the U.S. FAA as an AMOC (AMOC note).\n\n**Sources within the directive (where to look in the text):**\n\n- Which aeroplanes: Applicability (serial number ranges).\n- What to do: Requirements 1–3 (inspect, replace, spares rule).\n- How to do it: follow Cessna Service Bulletin SB05-24-01 (and FAA‑approved later revisions) (AMOC note).\n- When to do it: Compliance times (30 days for inspection; replacement before further flight; spares rule effective immediately).\n\nThis summary describes the directive’s mechanical requirements, the safety rationale offered by the FAA, and the primary practical costs and implementation trade‑offs operators should expect. It does not assess the technical adequacy of the remedy beyond reporting the directive’s specified actions."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-180-87-main-electrical-power-junction-box","history":"/api/acts/ad-cessna-180-87-main-electrical-power-junction-box/history","analysis":"/api/acts/ad-cessna-180-87-main-electrical-power-junction-box/analysis","conflicts":"/api/acts/ad-cessna-180-87-main-electrical-power-junction-box/conflicts","importantCases":"/api/acts/ad-cessna-180-87-main-electrical-power-junction-box/important-cases","documents":"/api/acts/ad-cessna-180-87-main-electrical-power-junction-box/documents"}}