Air Conditioning – Outflow Valve Manual Mode Direct Current Motor Failure - Amendment
- Published
- Effective
- Deadline
- Replaces
- 2026-10
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators must prohibit dispatch of affected ACLP BD-500-1A10 and BD-500-1A11 aircraft under specified MEL items from the effective date of the previous AD CF-2026-10. Within 30 days of 4 November 2026, they must incorporate the revised AFM procedures approved by Transport Canada. Compliance with these actions is mandatory to continue legal operation of the affected aircraft.
Summary
Airworthiness Directive CF-2026-54 is an amendment issued by Transport Canada addressing the Air Conditioning Outflow Valve (OFV) manual mode Direct Current (DC) motor failure on Airbus Canada Limited Partnership (ACLP) Model BD-500-1A10 and BD-500-1A11 aircraft. This directive updates procedures related to the Cabin Pressure Control System to prevent loss of cabin pressure control due to potential OFV DC motor inoperability under high differential pressure conditions.
What changed
This amendment supersedes AD CF-2026-10 and retains its requirements while mandating the incorporation of updated Airplane Flight Manual (AFM) procedures to mitigate risks associated with OFV DC motor failure in manual mode. It introduces additional non-normal procedures in the AFM to address potential in-flight events and reinforces prohibitions on dispatching aircraft under certain Minimum Equipment List (MEL) items.
Why it matters
The directive is critical for aviation professionals as it addresses a safety risk that could lead to total loss of cabin pressure control, structural stress from excessive differential pressure, and inability to rapidly depressurize or evacuate smoke. Operators, maintenance organizations, and compliance teams must ensure updated procedures and MEL restrictions are followed to maintain airworthiness and flight safety.
More for Airbus BD-500 (A220 Series)
All 126- EASA AD 2026-0213Fuselage – Mid Avionics Bay – ModificationNov 4, 2026
- EASA AD CF-2026-53Powerplant – A220 Freezing Fog Limitation - Implementation / AmendmentNov 3, 2026
- EASA AD CF-2026-49Engine Controls – Throttle Quadrant Assembly – Throttle Lever Jamming - ReplacementOct 12, 2026
- EASA PAD 26-112Fuselage – Mid Avionics Bay – ModificationSep 23, 2026
- EASA AD CF-2026-45Wings – Discrepant Fasteners at Wing to Fuselage Joint - AmendmentSep 11, 2026
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