Airworthiness directives › 2021-03-06
AD 2021-03-06 Airworthiness Directives; Airbus Helicopters
Models named: SA-365N, SA-365N1, AS-365N2, AS 365 N3, EC 155B, EC155B1. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to Airbus Helicopters Model SA-365N, SA-365N1, AS-365N2, AS 365 N3, EC 155B, and EC155B1 helicopters, certificated in any category, equipped with magnetic plugs, part number (P/N) 1B7807 or P/N 704A34543017 (electrical), or P/N 365A32-1711-00 (non-electrical), as applicable, installed in the main gearbox (MGB) pump intake.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
Except as specified in paragraph (h) of this AD: Comply with all required actions and compliance times specified in, and in accordance with, European Aviation Safety Agency (now European Union Aviation Safety Agency) (EASA) AD 2018-0176, dated August 21, 2018 (EASA AD 2018-0176).
Unsafe condition
This AD was prompted by the FAA's determination that to improve the process and performance in collecting metal particles in MGB certain existing magnetic plugs (electrical and non-electrical) installed in the MGB pump intake must be replaced with improved non-electrical magnetic plugs. The FAA is issuing this AD to address metal particles causing seizure of the MGB, loss of power to the main rotor, and subsequent loss of control of the helicopter.
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