Time Limits / Maintenance Checks — Addition of Certification Maintenance Requirement Task
- Published
- Effective
- Deadline
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of Bombardier BD-100-1A10 Challenger 300 and 350 aircraft must incorporate the new restoration task for the left DCPC into the TLMC manual within 60 days of the directive's effective date. They must then perform the task according to the specified thresholds and intervals. Compliance with any superseding temporary revisions or later TLMC revisions approved by Transport Canada also satisfies this directive.
Summary
Canadian Airworthiness Directive CF-2023-78 addresses Bombardier Inc. BD-100-1A10 aeroplanes, including all serial numbers of the Challenger 300 and Challenger 350 models. This directive introduces a new Certification Maintenance Requirement (CMR) task related to the restoration of the left direct current power centre (DCPC) to mitigate erratic electrical system status indications. The directive aims to enhance aircraft safety by preventing electrical power loss incidents linked to contaminated electrical contacts.
What changed
The directive adds a new time-limited maintenance check task, identified as 24-61-01-101*, to the Time Limits / Maintenance Checks (TLMC) manual Part 2 for Bombardier BD-100-1A10 aircraft. This task focuses on restoring the left DCPC to address contamination issues not covered by previous directives. Operators must incorporate this task into their maintenance programs and perform it at specified intervals.
Why it matters
This directive is critical for aviation professionals because it addresses a safety risk involving momentary electrical power loss and loss of flight displays caused by erratic electrical system indications. Compliance ensures continued airworthiness and reduces the risk of in-flight electrical failures that could compromise aircraft controllability. Maintenance and compliance teams must update their procedures to include the new task to avoid unsafe conditions.
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