Airworthiness directives › 2024-18-03
AD 2024-18-03 Airworthiness Directives; Bombardier, Inc., Airplanes
Models named: BD-100-1A10. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to all Bombardier, Inc., Model BD-100-1A10 airplanes, certificated in any category.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
For any left-hand (LH) DCPC unit having part number (P/N) 975GC02Y04, 975GC02Y05, 975GC02Y06, or 975GC02Y07 that was not cleaned before the effective date of this AD as specified in Safran Service Bulletin 975GC02Y-24-018 or replaced before the effective date of this AD as specified in Bombardier Service Bulletin 100-24-29 or Bombardier Service Bulletin 350-24-004: Within 60 days after the effective date of this AD, verify the total flight hours of the LH DCPC unit since the date of manufacture by doing a records check in accordance with paragraph 2.B.(1) of the Accomplishment Instructions of the applicable service bulletin identified in paragraphs (g)(1) and (2) of this AD. (1) For airplanes having serial numbers 20001 through 20500 inclusive, use Bombardier Service Bulletin 100-24-29, dated April 9, 2021; or Revision 01, dated July 27, 2023. As of the effective date of this AD, use only Bombardier Service Bulletin 100-24-29, Revision 01, dated July 27, 2023. (2) For airplanes having serial numbers 20501 through 20999 inclusive, use Bombardier Service Bulletin 350-24-004, dated April 9, 2021; or Revision 01, dated July 27, 2023. As of the effective date of this AD, use only Bombardier Service Bulletin 350-24-004, Revision 01, dated July 27, 2023.
Unsafe condition
This AD was prompted by multiple reports of erratic electrical system status on the push button annunciators (PBAs) and the engine instrument and crew alerting system (EICAS) while on-ground and during flight, and by the determination that certain direct current power center (DCPC) units require additional modification or replacement. The FAA is issuing this AD to address erratic indications, which could cause the flightcrew to turn off fully operational electrical power sources, leading to partial or complete loss of electrical power. The unsafe condition, if not addressed, could result in loss of flight displays and reduced controllability of the airplane.
Affected ADs
This AD replaces AD 2023-11-01, Amendment 39-22446 (88 FR 44042, July 11, 2023) (AD 2023-11-01).
Read the original on the Federal Register →
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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