Airworthiness directives › 2024-16-13
AD 2024-16-13 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 Bombardier, Inc., Model BD-100-1A10 airplanes, certificated in any category, serial numbers 20003 through 20936 inclusive.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
Within 60 months from the effective date of this AD, install a monitoring circuit comprising of relays external to the HCM units, in accordance with sections 2.B. and 2.C. of the Accomplishment Instructions of the applicable material specified in paragraph (g)(1) or (2) of this AD. (1) Bombardier Service Bulletin 100-30-06, dated December 29, 2022 (for airplane serial numbers 20003 through 20500 inclusive). (2) Bombardier Service Bulletin 350-30-001, dated December 29, 2022 (for airplane serial numbers 20501 through 20936 inclusive).
Unsafe condition
This AD was prompted by a review of the air data system where Bombardier discovered that a single-point failure exists within the left-hand and right-hand heater current monitor (HCM) units. The FAA is issuing this AD to address the failure of the programmable logic device in the left-hand and right-hand HCM units. The unsafe condition, if not addressed, could lead to un-annunciated loss of ice protection on the air data probes, resulting in the potential display of misleading airspeed, and erroneous indications to the flightcrew.
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