{"id":"F2017L01379","name":"AD/DHC-8/36 Amdt 1 - Electrical Power - Battery Temperature Monitor","slug":"ad-dhc-8-36-amdt-1-electrical-power-battery-temperature-monitor","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":144194,"registerId":"commonwealth-F2017L01379-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Bombardier DHC-8 Series Aeroplanes","sectionType":"part","heading":"Bombardier DHC-8 Series Aeroplanes","content":"# Bombardier DHC-8 Series Aeroplanes\n\n| AD/DHC-8/36 Amdt 1 | Electrical Power - BatteryTemperature Monitor | 22/2017 |\n| ------------------ | --------------------------------------------- | ------- |\n\n| Applicability: | All Bombardier DHC-8 Series 102, 103, 106, 301, 311, 314, and 315, serial numbers 003 through 389 inclusive, with Ametek/Weston battery temperature monitor part number (P/N) 522487 installed.                                                                                                                                                                                                                                                                                                                              |\n| -------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Replace the battery temperature monitor P/N 522487 with a modified monitor P/N 522487-1, in accordance with Bombardier Service Bulletin (SB) 8-24-53 as in force from time to time.Note 1: Canadian AD CF-94-22R1 refers.Note 2: The words “as in force from time to time” require compliance with the most recent version of the SB.                                                                                                                                                                                        |\n| Compliance:    | Within 30 days after the commencement date of this AD, unless previously accomplished.Note 3: Previous compliance with the requirement in AD/DHC-8/36 constitutes compliance with the requirement in this AD.                                                                                                                                                                                                                                                                                                                |\n|                | This AD commences on 3 November 2017.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |\n| Background:    | Transport Canada Aviation advised that several incidents of battery temperature monitor failures have been reported, which caused heavy smoke in the flight compartment requiring emergency action to be taken by flight crew.This Directive requires the replacement of the monitors, averting the generation of smoke in the flight compartment.Amendment 1 of this AD is issued to reference the latest revision of the Canadian AD and to add DHC-8 model 315 aircraft to the applicability per the revised Canadian AD. |\n\n![](image.001.png)\n\nBen Wilson  \nDelegate of the Civil Aviation Safety Authority\n\n19 October 20017","sortOrder":0},{"sectionNumber":"AD/DHC-8/36 Amdt 1","sectionType":"part","heading":"AD/DHC-8/36 Amdt 1","content":"## AD/DHC-8/36 Amdt 1","sortOrder":1},{"sectionNumber":"Electrical Power - BatteryTemperature Mo","sectionType":"part","heading":"Electrical Power - BatteryTemperature Monitor","content":"## Electrical Power - Battery  \nTemperature Monitor","sortOrder":2},{"sectionNumber":"22/2017","sectionType":"part","heading":"22/2017","content":"## 22/2017","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"},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"Amendment 1 broadened the applicability by adding DHC-8 model 315 and updated the cross-reference to the latest Canadian AD; the core mechanical requirement (part-number swap per Bombardier SB 8-24-53) and the 30-day compliance deadline remain unchanged. (Background; Requirement; Compliance)."},"complexity_factors":["Targeted part-number replacement requirement (replace P/N 522487 with P/N 522487-1) — (Requirement).","Applicability limited to specific models and serial numbers and contingent on presence of P/N 522487, requiring physical checks of equipment and records — (Applicability).","Short mandatory compliance window of 30 days from commencement date increases scheduling and logistics pressure for operators — (Compliance).","\"As in force from time to time\" instruction to follow the most recent Bombardier Service Bulletin 8-24-53 creates an ongoing document-versioning obligation for operators and maintainers — (Requirement Note 2).","Recognition of prior compliance with the earlier AD affects recordkeeping and audit verification — (Compliance Note 3).","Amendment updates cross-reference to the latest Canadian AD and adds model 315 to applicability, altering the scope of affected aircraft — (Background)."],"plain_english_summary":"Requires replacement of Ametek/Weston battery temperature monitor P/N 522487 with modified P/N 522487-1 on affected Bombardier DHC-8 Series aeroplanes, following Bombardier Service Bulletin 8-24-53. It applies to serial numbers 003–389 (models 102, 103, 106, 301, 311, 314, 315) when the original monitor is installed, and operators must comply within 30 days of commencement (3 November 2017). Transport Canada reported monitor failures that produced heavy smoke; Amendment 1 adds model 315 and updates the Canadian AD reference."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This Amendment 1 maintains the original safety purpose (replacing faulty battery temperature monitors). The only expansion is adding DHC-8 model 315 aircraft to the applicability list, which aligns with the revised Canadian AD. This is a minor technical update rather than scope creep."},"complexity_factors":["Single, specific mechanical replacement requirement with clear part numbers","Limited applicability scope (7 specific aircraft models, specific serial number range, specific part number)","One cross-reference to a Canadian Airworthiness Directive (CF-94-22R1) and one Bombardier Service Bulletin","Simple compliance timeline (30 days from commencement, with single exemption for prior compliance)","No nested exceptions, conditional logic, or defined terms section","Total length is approximately 250 words"],"plain_english_summary":"CASA orders owners/operators of certain Bombardier DHC‑8 (Dash 8) Series 100/300/315 aircraft (s/n 003–389) to replace Ametek/Weston battery temperature monitor P/N 522487 with P/N 522487‑1 per Bombardier SB 8‑24‑53 within 30 days (by 3 Nov 2017). The mandatory fix prevents cockpit smoke incidents from failing monitors. Amendment 1 adds Model 315 and aligns with updated Canadian requirements; prior compliance with AD/DHC‑8/36 satisfies this AD."}},"importantCases":[],"_links":{"self":"/api/acts/ad-dhc-8-36-amdt-1-electrical-power-battery-temperature-monitor","history":"/api/acts/ad-dhc-8-36-amdt-1-electrical-power-battery-temperature-monitor/history","analysis":"/api/acts/ad-dhc-8-36-amdt-1-electrical-power-battery-temperature-monitor/analysis","conflicts":"/api/acts/ad-dhc-8-36-amdt-1-electrical-power-battery-temperature-monitor/conflicts","importantCases":"/api/acts/ad-dhc-8-36-amdt-1-electrical-power-battery-temperature-monitor/important-cases","documents":"/api/acts/ad-dhc-8-36-amdt-1-electrical-power-battery-temperature-monitor/documents"}}