Airworthiness directives › 2022-11-11
AD 2022-11-11 Airworthiness Directives; De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Airplanes
Models named: DHC-8-401, -402. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to De Havilland Aircraft of Canada Limited (type certificate previously held by Bombardier, Inc.) Model DHC-8-401 and -402 airplanes, certificated in any category, serial numbers 4001 and 4003 and subsequent.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
For any airplane having an NLG shock strut assembly, part number (P/N) 47100-XX (where XX represents any number), that has special bolt P/N 47205-1 or 47205-3: Within 1,600 flight cycles or 9 months after the effective date of this AD, whichever occurs first, modify the NLG shock strut assembly, in accordance with paragraph 3.B., “Procedure,” of the Accomplishment Instructions of De Havilland Aircraft of Canada Limited Service Bulletin 84-32-161, Revision B, dated March 31, 2021, including UTC Aerospace Systems Service Bulletin 47100-32-145, Revision 3, dated March 26, 2021. Note 1 to paragraph (g): After installing pivot pin retention bolt part number NAS6204-14D, AD 2021-25-12, Amendment 39-21856 (86 FR 72174, December 21, 2021) applies to pivot pin retention bolt part number NAS6204-14D.
Unsafe condition
This AD was prompted by reports of a certain bolt at the pivot pin link being found missing or having stress corrosion cracking. The FAA is issuing this AD to address failure of the pivot pin retention bolt, which could result in a loss of directional control or loss of a nose landing gear (NLG) tire during takeoff or landing, which could lead to runway excursions.
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