AD 2003-06-51 Airworthiness Directives; Learjet Model 45 Airplanes

Models named: 45. Read the applicability below — it usually turns on serial or part numbers too.

Model 45 airplanes, serial numbers 45-001 through 45-232 inclusive; certificated in any category.

Required as indicated, unless accomplished previously. To prevent structural failure of the horizontal stabilizer actuator assembly, which could result in possible loss of control of the airplane, accomplish the following: Inspection (a) Before further flight, do an inspection to determine the part number (P/N) of the horizontal stabilizer actuator assembly (A66), per paragraph 2., “Accomplishment Instructions,” of Bombardier Learjet Alert Service Bulletin SB A45-27-15, dated March 20, 2003, excluding Service Bulletin Compliance Response. Corrective Action (b) If a horizontal stabilizer actuator assembly (A66) having P/N 6627401000-001 or P/N 2A9200F is found installed during the inspection required by paragraph (a) of this AD, before further flight, replace the horizontal stabilizer actuator assembly (A66) with a new or serviceable actuator assembly (A66) having P/N 6627401000-005, per paragraph 2., “Accomplishment Instructions,” of Bombardier Learjet Alert Service Bulletin SB A45-27-15, dated March 20, 2003, excluding Service Bulletin Compliance Response. Parts Installation (c) As of the effective date of this AD, no person shall install any horizontal stabilizer actuator assembly (A66) having P/N 6627401000-001 or P/N 2A9200F, on any airplane. Special Flight Permit (d) Special flights may be issued for flights limited to required flight crew only, per sections 21.197 and 21.199 of the Federal Aviation Regulations (14 CFR 21.197 and 21.199) to operate the airplane to a location where the requirements of this AD can be accomplished. Alternative Methods of Compliance (e) To request a different method of compliance or a different compliance time for this AD, follow the procedures in 14 CFR 39.19. Alternative methods of compliance for this emergency AD will be approved by the Manager, Wichita Aircraft Certification Office (ACO), FAA. Contact David Hirt, Wichita ACO, FAA, for information about previously approved alternative methods of compliance. Incorporation by Reference (f) The actions shall be done in accordance with Bombardier Learjet Alert Service Bulletin SB A45-27-15, dated March 20, 2003, excluding Service Bulletin Compliance Response. 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 Learjet, Inc., One Learjet Way, Wichita, Kansas 67209-2942. Copies may be inspected at the FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington; or at the FAA, Wichita Aircraft Certification Office, 1801 Airport Road, Room 100, Mid-Continent Airport, Wichita, Kansas; or at the Office of the Federal Register, 800 North Capitol Street, NW., suite 700, Washington, DC. Effective Date (g) This amendment becomes effective on April 28, 2003, to all persons except those persons to whom it was made immediately effective by emergency AD 2003-06-51, issued on March 20, 2003, which contained the requirements of this amendment. Issued in Renton, Washington, on April 11, 2003. Ali Bahrami, Acting Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 03-9430 Filed 4-18-03; 8:45 am] BILLING CODE 4910-13-P