Airworthiness directives › 2020-23-06
AD 2020-23-06 Airworthiness Directives; Airbus Helicopters
Applicability*9
This AD becomes effective December 24, 2020.
Compliance
(1) The Manager, Rotorcraft Standards Branch, FAA, may approve AMOCs for this AD. Send your proposal to: Matt Fuller, AD Program Manager, Operational Safety Branch, Airworthiness Products Section, General Aviation & Rotorcraft Unit, FAA, 10101 Hillwood Pkwy., Fort Worth, TX 76177; telephone 817-222-5110; email matthew.fuller@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.
Required actions
The subject of this AD is addressed in European Union Aviation Safety Agency (EASA) No. 2019-0172, dated July 18, 2019. You may view the EASA AD on the internet at https://www.regulations.gov by searching for and locating Docket No. FAA-2020-0652.
Unsafe condition
(1) Within 55 hours time-in-service, remove at least one M/R revolutions per minute (“NR”) sensor and borescope inspect the phonic wheel lock washer (lock washer) for correct height of the lock washer (if the installation is correct, you can see the edge of the splines) through the hole of the removed “NR” sensor(s) as shown in Figure 1 to Airbus Helicopters Alert Service Bulletin No. AS332-62.00.76, Revision 0, dated May 27, 2019. (i) If the height of the lock washer is correct, before further flight, install the “NR” sensor(s). (ii) If the height of the lock washer is not correct, before further flight, install the “NR” sensor(s) and repair or replace the M/R hub in accordance with FAA-approved procedures. (2) As of the effective date of this AD, do not install M/R hub P/N 332A31-0001-00, 332A31-0001-01, 332A31-0001-02, 332A31-0001-03, 332A31-0001-04, 332A31-0001-05, or 332A31-0001-06 on any helicopter unless the actions of paragraph (e)(1) of this AD have been accomplished.
Affected ADs
This AD defines the unsafe condition as incorrect assembly of the M/R hub. This condition could result in failure of the M/R hub components and subsequent loss of control of the helicopter.
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