Airworthiness directives › 2003-14-51
AD 2003-14-51 Airworthiness Directives; MD Helicopters, Inc., Model MD900 Helicopters
Models named: MD900. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
Model MD900 helicopters, serial number 900-00008 through 900-00114, with main rotor blade retention bolt (bolt), part number 900R3100001-103, installed, certificated in any category.
Compliance
Required as indicated, unless accomplished previously. To prevent failure of a bolt, loss of a main rotor blade, and subsequent loss of control of the helicopter, accomplish the following: (a) Before further flight, remove, inspect, and reinstall the bolt in accordance with the Accomplishment Instructions, paragraph 2.B., of MD Helicopters Service Bulletin SB900-092 R1, dated June 30, 2003 (SB). If segments do not move freely or a crack is found, replace the bolt with an airworthy bolt before further flight. (b) Thereafter, before each start of the engines, for each bolt with 400 or more hours time-in-service (TIS) or if the hours TIS is not available for each bolt, visually check each bolt as follows: (1) Check that the position of each installed bolt has not shifted upward. (2) Check for a gap between the thrust washer and retainer. (3) An owner/operator (pilot), holding at least a private pilot certificate, may perform the visual check required by this paragraph and must enter compliance into the aircraft maintenance records in accordance with 14 CFR sections 43.11 and 91.417(a)(2)(v)). (c) If a bolt has shifted upward or if there is no gap between the thrust washer and retainer (the gap indicates that the O ring is intact), before further flight, inspect the bolt in accordance with the Accomplishment Instructions, paragraph 2.B., of the SB. (d) After accomplishing paragraph (a) of this AD, thereafter, at intervals not to exceed 6 hours TIS, for bolts with 400 or more hours TIS, do a cam lever force inspection on each bolt, without removing the bolt, in accordance with the Accomplishment Instructions, paragraphs 2.B.(3) and 2.B.(6) of the SB. (e) Within 30 days, for bolts with 400 or more hours TIS, disassemble, inspect, and reinstall each airworthy bolt in accordance with the Accomplishment Instructions, paragraph 2.C. of the SB, except you are not required to report inspection results to MD Helicopters, Inc. If a crack, fretting, or corrosion is found, replace the bolt with an airworthy bolt before further flight. (f) Before accumulating 400 hours TIS, for bolts with less than 400 hours TIS, disassemble, inspect, and reinstall each airworthy bolt in accordance with the Accomplishment Instructions, paragraph 2.C. of the SB, except you are not required to report inspection results to MD Helicopters, Inc. If a crack, fretting, or corrosion is found, replace the bolt with an airworthy bolt before further flight. (g) Accomplishing paragraphs (e) or (f) of this AD constitutes terminating action for all of the requirements of this AD. (h) 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 Los Angeles Aircraft Certification Office, FAA, for information about previously approved alternative methods of compliance. (i) The inspections and replacement of a bolt shall be done in accordance with MD Helicopters Service Bulletin SB900-092 R1, dated June 30, 2003. This incorporation by reference was approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Copies may be obtained from MD Helicopters Inc., Attn: Customer Support Division, 4555 E. McDowell Rd., Mail Stop M615-GO48, Mesa, Arizona 85215-9734, telephone 1-800-388-3378, fax 480-891-6782, or on the web at http://www.mdhelicopters.com. Copies may be inspected at the FAA, Office of the Regional Counsel, Southwest Region, 2601 Meacham Blvd., Room 663, Fort Worth, Texas; or at the Office of the Federal Register, 800 North Capitol Street, NW., suite 700, Washington, DC. (j) This amendment becomes effective on August 25, 2003, to all persons except those persons to whom it was made immediately effective by Emergency AD 2003-14-51, issued July 2, 2003, which contained the requirements of this amendment. Issued in Fort Worth, Texas, on July 29, 2003. Scott A. Horn, Acting Manager, Rotorcraft Directorate, Aircraft Certification Service. [FR Doc. 03-19976 Filed 8-7-03; 8:45 am] BILLING CODE 4910-13-M
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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