AD 2009-03-01 Airworthiness Directives; Learjet Model 55, 55B, and 55C Airplanes

Models named: 55, 55B, 55C. Read the applicability below — it usually turns on serial or part numbers too.

This AD applies to Learjet Model 55, 55B, and 55C airplanes, certificated in any category; serial numbers 002 through 147 inclusive.

Comply with this AD within the compliance times specified, unless already done. Inspections, Corrective Actions, and Installation (g) Within 30 days or 25 flight hours after the effective date of this AD, whichever occurs first, do the actions specified in paragraphs (g)(1) and (g)(2) of this AD. Do the actions in accordance with the Accomplishment Instructions of Bombardier Alert Service Bulletin A55-25-7, dated December 17, 2008. (1) Do a general visual inspection of the installation of the forward light assembly in the aft lavatory to determine the location of the terminal connector; do a general visual inspection for damage of the light assembly terminals, wires, and oxygen lines; do a general visual inspection to determine if the cable nipple is installed over the light assembly terminal; and do all applicable corrective actions. Do all applicable corrective actions before further flight. Note 1: For the purposes of this AD, a general visual inspection is: “A visual examination of an interior or exterior area, installation, or assembly to detect obvious damage, failure, or irregularity. This level of inspection is made from within touching distance unless otherwise specified. A mirror may be necessary to ensure visual access to all surfaces in the inspection area. This level of inspection is made under normally available lighting conditions such as daylight, hangar lighting, flashlight, or droplight and may require removal or opening of access panels or doors. Stands, ladders, or platforms may be required to gain proximity to the area being checked.” (2) Install a clamp and hardware to the forward side of the frame to maintain the distance specified in Bombardier Alert Service Bulletin A55-25-7, dated December 17, 2008, between the light assembly and oxygen line. No Reporting (h) Although Bombardier Alert Service Bulletin A55-25-7, dated December 17, 2008, specifies to submit certain information to the manufacturer, this AD does not include that requirement. Alternative Methods of Compliance (AMOCs) (i)(1) The Manager, Wichita Aircraft Certification Office, FAA, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. Send information to ATTN: Daniel Hilton, Aerospace Engineer, Electrical Systems and Avionics Branch, ACE-119W, FAA, Wichita Aircraft Certification Office, 1801 Airport Road, Room 100, Mid-Continent Airport, Wichita, Kansas 67209; telephone (316) 946-4173; fax (316) 946-4107. (2) To request a different method of compliance or a different compliance time for this AD, follow the procedures in 14 CFR 39.19. Before using any approved AMOC on any airplane to which the AMOC applies, notify your principal maintenance inspector (PMI) or principal avionics inspector (PAI), as appropriate, or lacking a principal inspector, your local Flight Standards District Office (FSDO). The AMOC approval letter must specifically reference this AD. Material Incorporated by Reference (j) You must use Bombardier Alert Service Bulletin A55-25-7, dated December 17, 2008, to do the actions required by this AD, unless the AD specifies otherwise. (1) The Director of the Federal Register approved the incorporation by reference of this service information under 5 U.S.C. 552(a) and 1 CFR part 51. (2) For service information identified in this AD, contact Learjet, Inc., One Learjet Way, Wichita, Kansas 67209-2942; telephone 316-946-2000; fax 316-946-2220; e-mail ac.ict@aero.bombardier.com ; Internet http://www.bombardier.com . (3) You may review copies of the service information at the FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington. For information on the availability of this material at the FAA, call 425-227-1221 or 425-227-1152. (4) You may also review copies of the service information that is incorporated by reference at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, call 202-741-6030, or go to: http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html . Issued in Renton, Washington, on January 21, 2009. Ali Bahrami, Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. E9-3023 Filed 2-17-09; 8:45 am] BILLING CODE 4910-13-P

This AD results from a report of a cabin fire in the left-hand upper cabin fuselage above the aft cabin window at frame 23. We are issuing this AD to detect and correct improper installation of the lavatory light assembly, which could result in contact between the electrical terminals of the light assembly and an adjacent oxygen supply line, and consequent short circuit or fire hazard.