Airworthiness directives › 2012-12-11
AD 2012-12-11 Airworthiness Directives; Bell Helicopter Textron Canada, Limited, Helicopters
Applicability*9
This AD becomes effective July 24, 2012.
Compliance
(1) The Manager, Seattle Aircraft Certification Office, FAA, may approve AMOCs for this AD. Send your proposal to: Kathleen Arrigotti, Aviation Safety Engineer, Seattle Aircraft Certification Office, Transport Airplane Directorate, FAA, 1601 Lind Avenue SW., Renton, WA 98057; telephone (425) 917-6426; email 9-ANM-Seattle-ACO-AMOC-Requests@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
Aviation Specialties Unlimited, Inc., Alert Service Bulletin No. ASU 206-2010-11-1, dated November 4, 2010, which is not incorporated by reference, contains additional information about the subject of this AD. For service information identified in this AD, contact Aviation Specialties Unlimited, Inc., 4632 Aeronca Street, Boise, Idaho 83705; telephone (208) 426-8117; fax (208) 426-8975; or http://www.asu-nvg.com/. You may review this service information at the FAA, Office of the Regional Counsel, Southwest Region, 2601 Meacham Blvd., Room 663, Fort Worth, Texas 76137.
Unsafe condition
Within 30 days or 50 hours time-in-service, whichever occurs first: (1) Determine the date of the STC installation. (2) If the date of the STC installation is on or before April 6, 2011, or the date is undocumented, determine whether the cockpit TOT indicator unit has an unfiltered internal over-temperature warning light. If the unit has an unfiltered internal over-temperature warning light, install an NVIS filter, part number ASU-TOTGAG-1.
Affected ADs
This AD defines the unsafe condition as an unfiltered turbine outlet temperature (TOT) indicator over-temperature warning light, when illuminated, creating glare and reflections that could degrade the pilot's view through night vision goggles. This condition could result in loss of control of the helicopter.
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