Electrical Power – Misleading indication
Superseded. A newer version replaces this document.
- Published
- Effective
- Deadline
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators must verify the total accumulated air time on the left-hand DCPC units within 60 days of the directive's effective date. If the air time is 3100 hours or more, the DCPC unit must be replaced within 19 months following the directive's effective date. Compliance must follow the applicable Bombardier service bulletins and approved revisions.
Summary
Canadian Airworthiness Directive CF-2022-28 addresses erratic electrical system indications on Bombardier BD-100-1A10 aircraft, serial numbers 20003 through 20836. The directive targets misleading electrical power status caused by contamination in the left-hand direct current power centre (DCPC) internal communication data bus. It mandates verification and potential replacement of affected DCPC units to ensure reliable electrical power indications and flight safety.
What changed
This new Airworthiness Directive introduces mandatory verification of accumulated air time on the left-hand DCPC units and requires replacement of units exceeding 3100 hours or those not previously cleaned. It also mandates compliance with specific Bombardier service bulletins for inspection and replacement procedures. The directive supersedes previous operational mitigations by enforcing hardware maintenance actions.
Why it matters
This directive is critical for operators and maintenance organizations to prevent misleading electrical system indications that could lead to loss of electrical power and flight displays. Compliance ensures continued airworthiness and reduces the risk of in-flight electrical failures that compromise aircraft controllability. It also aligns maintenance practices with Transport Canada's safety requirements.
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