Airworthiness directives › 2021-25-07
AD 2021-25-07 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 20780 inclusive.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
Within 12 months after the effective date of this AD: Inspect the left-hand (LH) and right-hand (RH) MLG side stay actuator assembly pin nuts for presence of a lockwire, in accordance with paragraph 2.B of the Accomplishment Instructions of the applicable service information specified in paragraphs (g)(1) and (2) of this AD. If the lockwire is missing: Before further flight, install a lockwire in accordance with paragraph 2.C of the Accomplishment Instructions of the applicable service information specified in paragraphs (g)(1) and (2) of this AD. (1) Bombardier Service Bulletin 100-32-36, dated June 25, 2020. (2) Bombardier Service Bulletin 350-32-012, dated June 25, 2020.
Unsafe condition
This AD was prompted by a discovery that a lockwire may not have been installed on the side stay actuator pin nut of the main landing gear (MLG). The FAA is issuing this AD to address a possible missing lockwire, which could result in loss of the nut, and if undetected, lead to the collapse of the affected MLG.
Affected ADs
None.
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