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2026-11-06 Recurring

final rule

Airworthiness Directives; De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Airplanes

Unsafe Condition: Cracked barrel nuts at the wing front spar and horizontal stabilizer to vertical stabilizer joint.

Effective: Jul 9, 2026 Category: aircraft

Why matched: Airworthiness Directives; De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Airplanes

Technical illustration of a riveted aircraft structural panel and frame
Problem area Airframe structure

2026-08-07

final rule

Airworthiness Directives; De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Airplanes

Unsafe Condition: Cracks in elevator power control unit (PCU) brackets (fittings) and the elevator front spar.

Effective: Jun 3, 2026 Category: aircraft

Why matched: Airworthiness Directives; De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Airplanes

Technical illustration of an aircraft flight control surface and actuator
Problem area Flight controls

2025-19-05 Recurring

final rule

Airworthiness Directives; De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Airplanes

Unsafe Condition: Failure of an elevator PCU fitting (bracket) or fracture of the front spar into two segments; either structural failure may cause a jam in one elevator or a loss of airplane pitch control if both e...

Effective: Oct 31, 2025 Category: aircraft Compliance: Within 50 flight hours

Why matched: Airworthiness Directives; De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Airplanes

Technical illustration of an aircraft flight control surface and actuator
Problem area Flight controls

2024-22-07

final rule

Airworthiness Directives; De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Airplanes

Unsafe Condition: Failure of certain fuse/shuttle valves to function properly, which can cause valve deformation leading to premature wear and eventual fuse/shuttle valve failure, resulting in the loss of powered la...

Effective: Dec 31, 2024 Category: aircraft Compliance: Within 8,000 flight hours or 48 months, whichever occurs first after the effective date of the AD.

Why matched: Airworthiness Directives; De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Airplanes

Technical illustration of an aircraft landing gear and wheel assembly
Problem area Landing gear

2024-12-05 Recurring

final rule

Airworthiness Directives; De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Airplanes

Unsafe Condition: Failure of the pivot pin retention bolt, which could result in a loss of directional control or loss of an NLG tire during takeoff or landing, which could lead to runway excursions.

Effective: Aug 21, 2024 Category: aircraft Compliance: Before further flight

Why matched: Airworthiness Directives; De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Airplanes

2024-12-06

final rule

Airworthiness Directives; De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Airplanes

Unsafe Condition: Reports of moisture in the wing-to-fuselage joint, between the mating front spar and rear spar frame segments. The condition, if not corrected, could lead to corrosion and structural degradation of...

Effective: Aug 21, 2024 Category: aircraft Compliance: Within 50 flight hours

Why matched: Airworthiness Directives; De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Airplanes

2024-08-04

final rule

Airworthiness Directives; De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Airplanes

Unsafe Condition: Failure to adhere to the specified interval limitations may result in reduced structural integrity of the airplane.

Effective: Jun 20, 2024 Category: aircraft Compliance: Within 90 work-hours

Why matched: Airworthiness Directives; De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Airplanes

2024-02-02

final rule

Airworthiness Directives; De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Airplanes

Unsafe Condition: gapping and bending of the saddle washer that could have the potential to reduce the life of the bolt, which in turn could affect the structural integrity of the horizontal stabilizer to vertical s...

Effective: Mar 21, 2024 Category: aircraft Compliance: Within 50 flight hours

Why matched: Airworthiness Directives; De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Airplanes

2023-16-05 Recurring

final rule

Airworthiness Directives; De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Airplanes

Unsafe Condition: possible cam assembly, spring box assembly, and alternate release cable assembly failures, which could result in asymmetric main landing gear configuration at landing, and a runway excursion.

Effective: Sep 25, 2023 Category: aircraft Compliance: Within 50 flight hours

Why matched: Airworthiness Directives; De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Airplanes

Technical illustration of an aircraft landing gear and wheel assembly
Problem area Landing gear

2023-07-06

final rule

Airworthiness Directives; De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Airplanes

Unsafe Condition: corrosion on the horizontal stabilizer lower center skin panel, including a finding of corrosion where the skin thickness had been substantially reduced, affecting design margins

Effective: Jun 20, 2023 Category: aircraft Compliance: Within 50 flight hours

Why matched: Airworthiness Directives; De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Airplanes

Technical illustration of a riveted aircraft structural panel and frame
Problem area Airframe structure

2023-10-02

final rule

Airworthiness Directives; Transport and Commuter Category Airplanes

Unsafe Condition: Radio altimeter anomalies that are undetected by the automation or pilot, particularly close to the ground (e.g., landing flare), could lead to loss of continued safe flight and landing. Additional...

Effective: May 26, 2023 Category: aircraft Compliance: Before further flight

Why matched: Airworthiness Directives; Transport and Commuter Category Airplanes

2023-06-03

final rule

Airworthiness Directives; De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Airplanes

Unsafe Condition: A discrepant sleeve with missing lubrication grooves can result in the fatigue failure of the forward door linkage, leading to possible interference with the extension or retraction of the correspo...

Effective: May 18, 2023 Category: aircraft Compliance: Before further flight

Why matched: Airworthiness Directives; De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Airplanes

Technical illustration of an aircraft landing gear and wheel assembly
Problem area Landing gear

2023-05-01

final rule

Airworthiness Directives; De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Airplanes

Unsafe Condition: FPU pressure switch failures resulting in flap inoperative events due to deformation of the FPU pressure switch internal mechanism due to hydraulic pressure spikes.

Effective: Apr 18, 2023 Category: aircraft Compliance: Within 50 flight hours

Why matched: Airworthiness Directives; De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Airplanes

2023-01-09

final rule

Airworthiness Directives; De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Airplanes

Unsafe Condition: altered electrical bonding paths, which may lead to lightning strike-induced ignition of the fuel tank

Effective: Mar 13, 2023 Category: aircraft Compliance: Before further flight

Why matched: Airworthiness Directives; De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Airplanes

Technical illustration of an aircraft fuel pump, filter, valve, and lines
Problem area Fuel system

2022-25-06

final rule

Airworthiness Directives; De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Airplanes

Unsafe Condition: The actual operating temperatures within the integrated flight cabinet (IFC) were significantly higher than anticipated during certification, which could lead to uncontrolled autopilot pitch trim s...

Effective: Jan 23, 2023 Category: aircraft Compliance: Within 50 flight hours

Why matched: Airworthiness Directives; De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Airplanes

2022-23-01 Recurring

final rule

Airworthiness Directives; De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Airplanes

Unsafe Condition: Wear on fuel couplings, bonding springs, and sleeves as well as fuel tube end ferrules and fuel component end ferrules, which could reduce the integrity of the electrical bonding paths through the ...

Effective: Dec 13, 2022 Category: aircraft Compliance: Before further flight

Why matched: Airworthiness Directives; De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Airplanes

Technical illustration of an aircraft fuel pump, filter, valve, and lines
Problem area Fuel system

2022-17-04

final rule

Airworthiness Directives; De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Airplanes

Unsafe Condition: broken P-clamps on the pressure relief line and the motive flow line in the fuel tanks, and a subsequent determination that certain service information lacked instructions for maintaining appropria...

Effective: Nov 1, 2022 Category: aircraft Compliance: Before further flight

Why matched: Airworthiness Directives; De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Airplanes

2022-15-08

final rule

Airworthiness Directives; Various Transport Airplanes

Unsafe Condition: Smoke and fumes in the flight deck, which could result in excessive flightcrew workload and injury to flight deck occupants.

Effective: Aug 12, 2022 Category: aircraft Compliance: Before further flight

Why matched: Airworthiness Directives; Various Transport Airplanes

2022-13-08

final rule

Airworthiness Directives; De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Airplanes

Unsafe Condition: Reports of nose wheel steering (NWS) hydraulic motors jamming during pushback or towing caused by worn out piston rod shoes.

Effective: Aug 10, 2022 Category: aircraft Compliance: Within 12,000 flight hours or 72 months

Why matched: Airworthiness Directives; De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Airplanes

2022-11-11

final rule

Airworthiness Directives; De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Airplanes

Unsafe Condition: Failure of the pivot pin retention bolt, which could result in a loss of directional control or loss of an NLG tire during takeoff or landing, which could lead to runway excursions.

Effective: Jul 8, 2022 Category: aircraft Compliance: Within 1,600 flight cycles or 9 months of the effective date.

Why matched: Airworthiness Directives; De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Airplanes

Technical illustration of an aircraft landing gear and wheel assembly
Problem area Landing gear

2022-11-14 Recurring

final rule

Airworthiness Directives; De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Airplanes

Unsafe Condition: Deterioration of greasing effectiveness over time could lead to failure to achieve an MLG down and locked condition, resulting in an MLG collapse upon landing and potentially causing the wing of th...

Effective: Jun 21, 2022 Category: aircraft Compliance: Within 500 flight hours or 3 months, whichever occurs first after the effective date of this AD

Why matched: Airworthiness Directives; De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Airplanes

2022-06-15

final rule

Airworthiness Directives; De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Airplanes

Unsafe Condition: reports of bleed air leaks in the wing box area and failure of the leak detection shroud, which could cause the main landing gear emergency release cable to malfunction

Effective: May 10, 2022 Category: aircraft Compliance: Within 48 months or 8,000 flight hours, whichever occurs first

Why matched: Airworthiness Directives; De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Airplanes

Technical illustration of an aircraft landing gear and wheel assembly
Problem area Landing gear

2022-03-02

final rule

Airworthiness Directives; De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Airplanes

Unsafe Condition: a possible hard contact between the #2 top high level sensor (HLS) terminal screw head and the #6 outer wing fuel access panel stiffener flange, which could be a source of ignition inside the fuel ...

Effective: Mar 17, 2022 Category: aircraft Compliance: Before further flight

Why matched: Airworthiness Directives; De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Airplanes

Technical illustration of an aircraft fuel pump, filter, valve, and lines
Problem area Fuel system

2022-01-02

final rule

Airworthiness Directives; De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Airplanes

Unsafe Condition: Premature corrosion and subsequent failure of the nacelle to landing gear and nacelle to rear wing spar attachment pins, which if undetected, could lead to a single or dual collapse of the main lan...

Effective: Mar 3, 2022 Category: aircraft Compliance: Before further flight

Why matched: Airworthiness Directives; De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Airplanes

2021-23-02

final rule

Airworthiness Directives; De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Airplanes

Unsafe Condition: insufficient separation between the advanced pneumatic detector (APD) sensing line and surrounding components, which could lead to a hydraulic leak, loss of hydraulic systems and loss of fire detec...

Effective: Jan 5, 2022 Category: aircraft Compliance: Within 48 months or 8,000 flight hours, whichever occurs first after the effective date of this AD

Why matched: Airworthiness Directives; De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Airplanes

Technical illustration of an aircraft landing gear and wheel assembly
Problem area Landing gear