Airworthiness directives › 2001-02-11
AD 2001-02-11 Airworthiness Directives; Bell Helicopter Textron, Inc. Model 204B Helicopters
Models named: 204B. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
Model 204B helicopters with main rotor mast assembly, part number (P/N) 204-011-450-001, 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 within 25 hours time-in-service, unless accomplished previously. To prevent failure of the main rotor mast assembly (mast) and subsequent loss of control of the helicopter, accomplish the following: (a) Remove any mast, P/N 204-011-450-001, from service and replace it with an airworthy mast. Accomplishing the requirement of this paragraph constitutes terminating action for the requirements of this AD. P/N 204-011-450-001 is not eligible for installation on any helicopter. (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, Rotorcraft Certification Office, 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, Rotorcraft Certification Office. Note 2: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Rotorcraft Certification Office. (c) Special flight permits may be issued in accordance with sections 21.197 and 21.199 of the Federal Aviation Regulations (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 March 22, 2001. Issued in Fort Worth, Texas, on January 19, 2001. Henry A. Armstrong, Manager, Rotorcraft Directorate, Aircraft Certification Service. [FR Doc. 01-3670 Filed 2-14-01; 8:45 am] BILLING CODE 4910-13-U
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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