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

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

EASA AD CF-2022-69

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.

Dec 19, 2022

Airworthiness DirectiveMaintenanceSafety MgmtDe Havilland Canada DHC-8De Havilland Aircraft of Canada Limited DHC-8-401De Havilland Aircraft of Canada Limited DHC-8-402

EASA AD CF-2022-52

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.

Sep 2, 2022

Airworthiness DirectiveMaintenanceSafety MgmtDe Havilland Canada DHC-8De Havilland Aircraft of Canada Limited DHC-8-401De Havilland Aircraft of Canada Limited DHC-8-402

EASA AD CF-2009-29R4

SUPERSEDED BY TCCA AD CF-2023-22

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.

Oct 4, 2021

Airworthiness DirectiveMaintenanceSafety MgmtDe Havilland Canada DHC-8De Havilland Aircraft of Canada Limited DHC-8-401De Havilland Aircraft of Canada Limited DHC-8-402

EASA AD CF-2021-28

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.

Aug 12, 2021

Airworthiness DirectiveMaintenanceSafety MgmtDe Havilland Canada DHC-8De Havilland Aircraft of Canada Limited DHC-8-401De Havilland Aircraft of Canada Limited DHC-8-402

EASA AD CF-2018-01R2

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.

Dec 2, 2019

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