Exhaust — Thrust Reverser — Disbonded or Missing Pivot Door Seal on Fixed Structure
- Published
- Effective
- Deadline
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of affected Bombardier BD-700-2A12 aircraft must perform a one-time inspection of the thrust reverser pivot door seals within 750 flight hours or 18 months from August 30, 2023, whichever occurs first. Any damaged or missing seals must be repaired or replaced following Bombardier Service Bulletin 700-78-7501 Revision 1 or later approved revisions. Inspections and repairs done per the initial April 12, 2023 service bulletin revision before the directive's effective date are also acceptable.
Summary
The Canadian Airworthiness Directive CF-2023-61 addresses an issue with the thrust reverser pivot door seal on Bombardier BD-700-2A12 aircraft. This directive mandates inspection and repair of disbonded or missing pivot door seals on the fixed structure of the thrust reverser to prevent potential engine thrust loss. The affected aircraft are specific serial numbers of the Bombardier BD-700-2A12 model.
What changed
CF-2023-61 introduces a mandatory inspection requirement for the pivot door seals on the thrust reverser fixed structure of affected Bombardier BD-700-2A12 aircraft. It requires operators to inspect and repair or replace any damaged or missing seals according to Bombardier Service Bulletin 700-78-7501 Revision 1 or later approved revisions. This directive makes previously recommended inspections compulsory to ensure compliance.
Why it matters
This directive is critical for maintaining engine performance and aircraft safety, as missing or disbonded seals can cause engine thrust loss and reduced aircraft climb performance, especially during single-engine operations. Compliance ensures that operators and maintenance organizations prevent potentially hazardous situations and meet regulatory requirements. It also helps avoid operational disruptions due to unplanned maintenance or safety incidents.
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