Airworthiness directives › 2015-14-04
AD 2015-14-04 Airworthiness Directives; Kaman Aerospace Corporation (Kaman) Helicopters
Applicability*9
This AD becomes effective August 17, 2015.
Compliance
(1) The Manager, Boston Aircraft Certification Office, FAA, may approve AMOCs for this AD. Send your proposal to: Nicholas Faust, Aviation Safety Engineer, Boston Aircraft Certification Office, Engine & Propeller Directorate, 12 New England Executive Park, Burlington, Massachusetts 01803; telephone (781) 238-7763; email nicholas.faust@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
Kaman Aerospace Corporation Maintenance Manual 04-00-00, Continued Airworthiness, Revision 31, dated August 1, 2013, and Kaman Aerospace Corporation Maintenance Manual 05-20-06, 1,000 Hour Rotor Blade Spar Inspection, Revision 31, dated August 1, 2013, which are not incorporated by reference, contain additional information about the subject of this AD. For service information identified in this AD, contact Kaman Aerospace Corporation, Old Windsor Rd., P.O. Box 2, Bloomfield, Connecticut 06002-0002; telephone (860) 242-4461; fax (860) 243-7047; or at http://www.kamanaero.com. You may review a copy of this service information at the FAA, Office of the Regional Counsel, Southwest Region, 2601 Meacham Blvd., Room 663, Fort Worth, Texas 76137.
Unsafe condition
(1) Before the MRB reaches 3,000 hours time-in-service (TIS) or within 50 hours TIS, whichever occurs later, and thereafter at intervals not exceeding 1,000 hours TIS: (i) X-Ray inspect each MRB between station (STA) 30 and 289 for a crack, a wood split, a void, and delamination. (ii) Using a 10X or higher power magnifying glass, inspect each spar plank between STA 33 and STA 78 for a wood split or a crack, and inspect each spar plank to plank glueline for a void or delamination. (2) If there is a crack, wood split, void, or delamination within maximum repair damage limits in an MRB, before further flight, repair the MRB. If there is a crack, wood split, void, or delamination exceeding maximum repair damage limits in an MRB, before further flight, replace the MRB with an airworthy MRB. (3) Each inspection and repair procedure required for compliance with Paragraphs (e)(1) and (e)(2) of this AD must be accomplished by a method approved by the Manager, Boston Aircraft Certification Office (ACO). For a repair method to be approved by the Manager, Boston ACO, as required by this AD, the Manager's approval letter must specifically refer to this AD.
Affected ADs
This AD defines the unsafe condition as a crack in an MRB, which could lead to failure of the MRB and subsequent loss of control of the helicopter.
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