Airworthiness directives › 2024-18-06
AD 2024-18-06 Airworthiness Directives; Bombardier, Inc., Airplanes
Models named: BD-700-2A12. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to Bombardier, Inc., Model BD-700-2A12 airplanes, certificated in any category, serial numbers 70007, 70008, 70010, 70012 through 70047 inclusive, 70049, 70051, 70052, 70053, 70055 through 70077 inclusive, 70079, 70080, 70081, 70083 through 70133 inclusive, 70135, 70136, 70137, 70138, 70142 through 70148 inclusive, 70150, 70152, and 70158.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
(1) Within 750 flight hours or 18 months, whichever comes first from the effective date of this AD, perform a general visual inspection for discrepancies (missing, damaged, or disbonding) of the 4 pivot door pressure seals on the thrust reverser door of each engine, and perform a bonding check as applicable, and repair or replace each discrepant seal as applicable, in accordance with Part 2.B of the Accomplishment Instructions of Bombardier Service Bulletin 700-78-7501, Revision 01, dated July 13, 2023. Applicable corrective actions must be done before further flight. (2) Before further flight after accomplishing the actions specified in paragraph (g)(1) of this AD: Perform a functional test of the thrust reverser in accordance with Part 2.C of the Accomplishment Instructions of Bombardier Service Bulletin 700-78-7501, Revision 01, dated July 13, 2023.
Unsafe condition
This AD was prompted by reports that the pivot door pressure seals on the thrust reverser fixed structure were found disbonded or missing on several airplanes. The FAA is issuing this AD to address the pivot door pressure seals on the thrust reverser fixed structure. The unsafe condition, if not addressed, could result in engine thrust loss due to flow path overboard leakage during forward thrust operation and reduce airplane performance during one-engine inoperative conditions in climb margin and ceiling altitude.
Affected ADs
None.
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The directive text above is reproduced from the Federal Register, a work of the United States government and in the public domain. The separation into applicability, compliance and required actions is TrackAD's.*1