Airworthiness directives › 2012-02-51
AD 2012-02-51 Airworthiness Directives; Bell Helicopter Textron Canada Limited Helicopters
Applicability*9
This AD becomes effective May 4, 2012 to all persons except those persons to whom it was made immediately effective by Emergency AD No. 2012-02-51, issued on February 1, 2012.
Compliance
Special flight permits are prohibited.
Required actions
(1) The Manager, Safety Management Group, FAA, may approve AMOCs for this AD. Send your proposal to: Sharon Miles, Aerospace Engineer, FAA, Rotorcraft Directorate, Regulations and Policy Group, 2601 Meacham Blvd., Fort Worth, Texas 76137, telephone (817) 222 5110, email sharon.y.miles@faa.gov. (2) For operations conducted under a Part 119 operating certificate or under 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.
Unsafe condition
(1) Before further flight, reduce the life limit of the main rotor blades with a serial number listed in Table 1 of this AD from 3,600 hours time-in-service (TIS) to 1,400 hours TIS; revise the life limit in the Airworthiness Limitations section of the Instruction for Continued Airworthiness or maintenance manual; and record the revised life limit on the component history card or equivalent record. (2) Before further flight, remove from service any main rotor blade which has accumulated 1,400 or more hours TIS.
Affected ADs
This AD defines the unsafe condition as fatigue cracking of a main rotor blade. This condition could result in failure of the main rotor blade and subsequent loss of control of the helicopter.
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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