Airworthiness directives › 2014-16-01
AD 2014-16-01 Airworthiness Directives; MD Helicopters, Inc., Helicopters
Applicability*9
This AD becomes effective August 20, 2014.
Compliance
(1) The Manager, Los Angeles Aircraft Certification Office, FAA, may approve AMOCs for this AD. Send your proposal to: Eric Schrieber, Aviation Safety Engineer, Transport Airplane Directorate, FAA, 3960 Paramount Blvd., Lakewood, California 90712; telephone (562) 627-5348; email eric.schrieber@faa.gov. (2) For operations conducted under a 14 CFR part 119 operating certificate or under 14 CFR part 91, subpart K, we suggest 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
Joint Aircraft Service Component (JASC) Code: 6220 Main Rotor Head.
Unsafe condition
Within the next 25 hours time-in-service (TIS) or at the next annual inspection, whichever occurs first: (1) Clean each upper hub inspection area as shown in Figure 1 of MD Helicopters Service Bulletin SB900-122, dated April 8, 2014 (SB900-122). (2) Eddy current inspect the upper hub for a crack by following the Accomplishment Instructions, paragraphs 2.A.(3) through 2.A.(11) of SB900-122. This eddy current inspection must be performed by a Level II or higher technician with the National Aerospace Standard 410 or equivalent certification who has performed an eddy current inspection within the last 12 months. If there is a crack, before further flight, replace the upper hub with an airworthy upper hub.
Affected ADs
This AD defines the unsafe condition as a cracked upper hub. This condition could result in failure of the upper hub and subsequent loss of control of the helicopter.
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