EASA Regulations for De Havilland Aircraft of Canada Limited DHC-8-401

7 airworthiness directives and regulations affecting De Havilland Aircraft of Canada Limited DHC-8-401.

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New ADs and bulletins for De Havilland Aircraft of Canada Limited DHC-8-401, summarized like the ones below, every Monday.

EASA AD CF-2026-38

Aug 17, 2026

Maintenance Requirements Manual Part 2 - Airworthiness Limitation Items - Amendment

Maintenance Requirements Manual Part 2 - Airworthiness Limitation Items - Amendment is a Canadian Airworthiness Directive (AD CF-2026-38) affecting De Havilland Aircraft of Canada Limited model DHC-8-401 and DHC-8-402 aeroplanes. It mandates compliance with updated and more restrictive Candidate Certification Maintenance Requirements (CMR) limitations in the Maintenance Requirements Manual Part 2 Airworthiness Limitation Items section. The directive ensures continued airworthiness by requiring updated maintenance tasks and intervals.

Airworthiness Directive

De Havilland Canada DHC-8
De Havilland Aircraft of Canada Limited DHC-8-401
De Havilland Aircraft of Canada Limited DHC-8-402

EASA AD CF-2026-37

Aug 6, 2026

Time Limits / Maintenance Checks – Airworthiness Limitation Items – Amendment

Canadian Airworthiness Directive CF-2026-37 is an amendment addressing Time Limits and Maintenance Checks for Airworthiness Limitation Items (ALI) on De Havilland Aircraft of Canada Limited DHC-8-401 and DHC-8-402 models. It mandates compliance with updated and more restrictive maintenance tasks as defined in the DHC Maintenance Requirements Manual PSM 1-84-7 Part 2. The directive applies to all serial numbers of these aircraft models and includes detailed inspection requirements for various structural components.

Airworthiness Directive

De Havilland Canada DHC-8
De Havilland Aircraft of Canada Limited DHC-8-401
De Havilland Aircraft of Canada Limited DHC-8-402

EASA AD CF-2022-69

Dec 19, 2022

Landing Gear — Alternate Extension System — Cam Assembly Failures

Canadian Airworthiness Directive CF-2022-69 addresses landing gear alternate extension system cam assembly failures on De Havilland Aircraft of Canada Limited model DHC-8-401 and DHC-8-402 aeroplanes, serial numbers 4001 and 4003 through 4633. The directive mandates inspections and replacement of specific parts to prevent failure of the main landing gear alternate extension system. It also updates maintenance procedures to detect and correct damage to critical components.

Airworthiness Directive

De Havilland Canada DHC-8
De Havilland Aircraft of Canada Limited DHC-8-401
De Havilland Aircraft of Canada Limited DHC-8-402

EASA AD CF-2022-52

Sep 2, 2022

Flight Controls — Flap Power Unit — Pressure Switch Failures

Canadian Airworthiness Directive CF-2022-52 addresses flap power unit pressure switch failures on De Havilland Aircraft of Canada Limited model DHC-8-401 and DHC-8-402 aeroplanes, serial numbers 4001 and 4003 through 4633. The directive mandates replacement of certain flap power unit pressure switches to prevent flap inoperative events caused by hydraulic pressure spikes. This AD aims to enhance flight safety by reducing the risk of abnormal flap landings and emergency procedures.

Airworthiness Directive

De Havilland Canada DHC-8
De Havilland Aircraft of Canada Limited DHC-8-401
De Havilland Aircraft of Canada Limited DHC-8-402

EASA AD CF-2009-29R4

Oct 4, 2021

Nose Landing Gear – Loss of Pivot Pin Retention Bolt

The Canadian Airworthiness Directive CF-2009-29R4 addresses safety concerns on De Havilland Aircraft of Canada Limited DHC-8-401 and -402 aeroplanes, specifically related to the nose landing gear pivot pin retention bolt. This directive mandates modifications and maintenance procedures to prevent loss or damage of the retention bolt, which could lead to loss of nose wheel steering and directional control during take-off or landing. The directive applies to aircraft serial numbers 4001, 4003, and subsequent.

Airworthiness DirectiveSuperseded

De Havilland Canada DHC-8
De Havilland Aircraft of Canada Limited DHC-8-401
De Havilland Aircraft of Canada Limited DHC-8-402

EASA AD CF-2021-28

Aug 12, 2021

Landing Gear — Nose Wheel Steering Hydraulic Motor — Potential Jam Due to Wear

Canadian Airworthiness Directive CF-2021-28 addresses a potential jam in the nose wheel steering hydraulic motor due to wear on piston rod shoes in De Havilland Aircraft of Canada Limited model DHC-8-401 and DHC-8-402 aeroplanes, serial numbers 4001 and 4003 through 4622. The directive mandates re-identification or replacement of affected hydraulic motors to prevent loss of directional control during ground operations. It also prohibits installation of certain older hydraulic motor part numbers on these aircraft models.

Airworthiness Directive

De Havilland Canada DHC-8
De Havilland Aircraft of Canada Limited DHC-8-401
De Havilland Aircraft of Canada Limited DHC-8-402

EASA AD CF-2018-01R2

Dec 2, 2019

Landing Gear — Nose Landing Gear Drag Strut Lock Link Wear

The Airworthiness Directive CF-2018-01R2 addresses wear issues in the nose landing gear (NLG) drag strut lock link on De Havilland Aircraft of Canada Limited DHC-8-400, -401, and -402 models, serial numbers 4001 through 4585 and 4587. It mandates inspections and corrective actions to prevent NLG collapse caused by worn or loose bushings in the locking mechanism. This directive updates previous versions to clarify supersession and compliance requirements.

Airworthiness Directive

De Havilland Canada DHC-8
De Havilland Aircraft of Canada Limited DHC-8-400
De Havilland Aircraft of Canada Limited DHC-8-401
De Havilland Aircraft of Canada Limited DHC-8-402