Transport Canada issues AD CF-2026-37 TLMC-ALI for DHC-8-401/402 aeroplanes; new or more restrictive ALI tasks
Airworthiness Directive CF-2026-37- Time Limits/Maintenance Checks (TLMC) – Airworthiness Limitation Items (ALI)
TP 7245E 1 of 5 AD Number: CF-2026-37
AIRWORTHINESS DIRECTIVE This Airworthiness Directive (AD) is issued pursuant to Canadian Aviation Regulation (CAR) 521.427. No person shall conduct a take-off or permit a take-off to be conducted in an aircraft that is in their legal custody and control, unless the requirements of CAR 605.84 pertaining to ADs are met. Standard 625 - Aircraft Equipment and Maintenance Standards Appendix H provides information concerning alternative means of compliance (AMOC) with ADs. Number: CF-2026-37 ATA: 05 Effective Date: 4 September 2026 Type Certificate: A-142 Subject: Time Limits/Maintenance Checks (TLMC) – Airworthiness Limitation Items (ALI) Applicability: De Havilland Aircraft of Canada Limited (DHC) (Formerly Bombardier Inc.) model DHC-8-401 and DHC-8- 402 aeroplanes, all serial numbers. Compliance: As indicated below, unless already accomplished. Background: The ALI for the model DHC-8-401 and DHC-8-402 aeroplanes are defined and published in the DHC Maintenance Requirements Manual (MRM) PSM 1-84-7 Part 2, approved by Transport Canada (TC). The instructions contained in the DHC MRM PSM 1-84-7 Part 2 have been identified as mandatory actions for continued airworthiness. Failure to comply with these instructions could result in an unsafe condition. DHC has introduced changes to the DHC MRM PSM 1-84-7 Part 2 ALI wherein new tasks have been added and a number of existing tasks have been revised to become more restrictive. This AD requires completion of the new or more restrictive limitations within their thresholds and repeat intervals or within the discard time as applicable. Corrective Actions: Within the thresholds and repeat intervals identified within the tasks, or discard time, as applicable, complete the new or more restrictive limitations contained in DHC MRM PSM 1-84-7 Part 2 ALI manual identified in Table 1 below, as applicable to the aeroplane model and configuration. Compliance with superseding Temporary Revisions (TR) affecting these tasks or later revisions of DHC MRM PSM 1-84-7 Part 2 ALI manual, approved by TC, also meets the intent of this AD.
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