2005-21-04: Weld assembly scissors bracket

2005-21-04 Bell Helicopter Textron (Bell) and Coastal Helicopters, Inc. (CHI) (formerly Continental Copters, Inc.; and Tom-Cat Helicopters, Inc.): Docket No. FAA-2005-21725; Amendment No. 39- 14342; Directorate Identifier 2004-SW-45-AD. Applicability: The following helicopter models with the referenced Texas Helicopter Co., Inc. (THC) scissors assembly part number (P/N) or weld assembly scissors bracket P/N installed as a Parts Manufacturer Approval (PMA) replacement part or as part of the modification in accordance with Supplemental Type Certificate (STC) No. SH2772SW, certificated in any category. Model With scissors assembly P/N Or weld assembly scissors bracket P/N (1) Bell Model 47D1, 47G, 47G 2, 47G 2A, 47G 2A 1, 47G 3, 47G 3B, 47G 3B 1, 47G 3B 2, 47G 3B 2A, 47G 4, 47G 4A, 47G 5, 47G 5A; and 74 150 949 9 or 74 150 949 5 or 74 150 249 5M. 74 150 117 13M. (2) CHI OH 13H (Tomcat Mark 5A, 6B, or 6C). Compliance: Required as indicated, unless accomplished previously. To prevent using a scissors assembly or weld assembly scissors bracket past it's life limit, which could result in failure of the part and subsequent loss of control of the helicopter, accomplish the following: (a) Within 60 days, determine and record on the service record or equivalent record the total hours time-in-service (TIS) of each affected part. If the TIS hours cannot be determined, replace the part with an airworthy part with known hours TIS before further flight. (b) Thereafter, replace each affected part before it accumulates 5,000 hours TIS. Note: Texas Helicopter Co., Inc. Service Bulletin No. SB 003, dated December 1, 2002, pertains to the subject of this AD. (c) This AD establishes a life limit of 5,000 hours TIS for each affected PMA-produced scissors assembly and each affected PMA- produced weld assembly scissors bracket. (d) To request a different method of compliance or a different compliance time for this AD, follow the procedures in 14 CFR 39.19. Contact the Rotorcraft Certification Office, Rotorcraft Directorate, FAA, for information about previously approved alternative methods of compliance. (e) This amendment becomes effective on November 21, 2005.