Airworthiness directives › 2020-21-21
AD 2020-21-21 Airworthiness Directives; Leonardo S.p.a. Helicopters
Applicability*9
This AD becomes effective November 24, 2020.
Compliance
Special flight permits are prohibited.
Required actions
(1) The Manager, International Validation Branch, FAA, may approve AMOCs for this AD. Send your proposal to: Kristin Bradley, Aerospace Engineer, General Aviation & Rotorcraft Section, International Validation Branch, FAA, 10101 Hillwood Pkwy., Fort Worth, TX 76177; telephone 817-222-5110; email Kristin.Bradley@faa.gov. (2) For operations conducted under a 14 CFR part 119 operating certificate or under 14 CFR part 91, subpart K, the FAA suggests that you notify your principal inspector, or lacking a principal inspector, the manager of the local flight standards district office or certificate holding district office, before operating any aircraft complying with this AD through an AMOC.
Unsafe condition
(1) Within 25 hours time-in-service, remove from service any M/R floating ring assembly P/N 109-0111-09-101 or P/N 109-0111-09-103 with serial number (S/N) DA53295148-1, F86782, G130924, J31213, L99, L104, L107, L117, L127, L130, M215, P411, R687, R735, R769, R772, or V71. (2) After the effective date of this AD: (i) Do not install any M/R floating ring assembly P/N 109-0111-09-101 or P/N 109-0111-09-103 with S/N DA53295148-1, F86782, G130924, J31213, L99, L104, L107, L117, L127, L130, M215, P411, R687, R735, R769, R772, or V71 on any helicopter. (ii) Do not replace any washer P/N 109-0111-23-101 on any M/R floating ring assembly installed on any helicopter.
Affected ADs
This AD defines the unsafe condition as disbonding of the washer from the M/R floating ring assembly. This condition could result in a significant increase of pilot workload and subsequent loss of control of the helicopter.
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