Airworthiness directives › 2002-11-09
AD 2002-11-09 Airworthiness Directives; Bell Helicopter Textron Canada Model 407 Helicopters
Models named: 407. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
Model 407 helicopters, serial number 53000 through 53442, with flywheel, part number (P/N) 407-040-316-101, installed, certificated in any category. Note 1: This AD applies to each helicopter identified in the preceding applicability provision, regardless of whether it has been otherwise modified, altered, or repaired in the area subject to the requirements of this AD. For helicopters that have been modified, altered, or repaired so that the performance of the requirements of this AD is affected, the owner/operator must request approval for an alternative method of compliance in accordance with paragraph (b) of this AD. The request should include an assessment of the effect of the modification, alteration, or repair on the unsafe condition addressed by this AD; and if the unsafe condition has not been eliminated, the request should include specific proposed actions to address it.
Compliance
Required as indicated, unless accomplished previously. To detect a crack in the forward bearing hanger bracket (bracket) and to prevent loss of tail rotor drive or tail rotor control and subsequent loss of control of the helicopter, accomplish the following: (a) Within 25 hours time-in-service (TIS) and thereafter at intervals not to exceed 25 hours TIS, visually inspect each bracket, P/N 407-040-321-101 or -103, for a crack in the shaded area shown in Figure 1 of this AD. Remove any cracked bracket from service. Note 2: Dismantling of the bearing hanger and the support is not required to accomplish the requirements of this AD. ER11JN02.003 Note 3: Bell Helicopter Textron Canada Alert Service Bulletin No. 407-01-39, Revision A, dated May 30, 2001, pertains to the subject of this AD. (b) An alternative method of compliance or adjustment of the compliance time that provides an acceptable level of safety may be used if approved by the Manager, Regulations Group, Rotorcraft Directorate, FAA. Operators shall submit their requests through an FAA Principal Maintenance Inspector, who may concur or comment and then send it to the Manager, Regulations Group. Note 4: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Regulations Group. (c) Special flight permits may be issued in accordance with 14 CFR 21.197 and 21.199 to operate the helicopter to a location where the requirements of this AD can be accomplished. (d) This amendment becomes effective on July 16, 2002. Note 5: The subject of this AD is addressed in Transport Canada (Canada) AD No. CF-2001-32, dated August 13, 2001. Issued in Fort Worth, Texas, on May 28, 2002. Mark R. Schilling, Acting Manager, Rotorcraft Directorate, Aircraft Certification Service. [FR Doc. 02-14566 Filed 6-10-02; 8:45 am] BILLING CODE 4910-13-P
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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