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AD 2024-21806

Published 2024-09-24 · 1 model · 872 US-registered tails affected · Federal Register

Airworthiness Directives; Bombardier, Inc., Airplanes Federal Register ↗

Abstract

The FAA is adopting a new airworthiness directive (AD) for certain Bombardier, Inc., Model BD-100-1A10 airplanes. This AD was prompted by the discovery of a single-point failure within the left- hand and right-hand heater current monitor (HCM) units. This AD requires installing a monitor circuit comprising relays external to the HCM units. This AD also requires revising the normal and non-normal procedure sections of the existing airplane flight manual (AFM) to add new procedures associated with revised crew alerting system (CAS) messages. The FAA is issuing this AD to address the unsafe condition on these products.

Applicability · by US fleet size

Federal Register text

Verbatim; the Federal Register publication is the legally binding document. Cite: 89 FR 77769. View on Federal Register ↗

[Federal Register Volume 89, Number 185 (Tuesday, September 24, 2024)] [Rules and Regulations] [Pages 77769-77772] From the Federal Register Online via the Government Publishing Office [www.gpo.gov] [FR Doc No: 2024-21806]

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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2024-0758; Project Identifier MCAI-2023-00671-T; Amendment 39-22819; AD 2024-16-13] RIN 2120-AA64

Airworthiness Directives; Bombardier, Inc., Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final rule.

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SUMMARY: The FAA is adopting a new airworthiness directive (AD) for certain Bombardier, Inc., Model BD-100-1A10 airplanes. This AD was prompted by the discovery of a single-point failure within the left- hand and right-hand heater current monitor (HCM) units. This AD requires installing a monitor circuit comprising relays external to the HCM units. This AD also requires revising the normal and non-normal procedure sections of the existing airplane flight manual (AFM) to add new procedures associated with revised crew alerting system (CAS) messages. The FAA is issuing this AD to address the unsafe condition on these products.

DATES: This AD is effective October 29, 2024. The Director of the Federal Register approved the incorporation by reference of certain publications listed in this AD as of October 29, 2024.