Airworthiness directives › 2003-16-09
AD 2003-16-09 Airworthiness Directives; Learjet Model 45 Airplanes
Models named: 45. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
Model 45 airplanes, serial numbers 45-005 through 45-208 inclusive, 45-210 through 45-222 inclusive, 45-224, 45-225, 45-227, and 45-229 through 45-231 inclusive; certificated in any category.
Compliance
Required as indicated, unless accomplished previously. To prevent failure of the shear pins in the trunnion assemblies of the main landing gears (MLG), which could result in the collapse of a MLG, and consequent reduced controllability of the airplane during takeoff or landing; accomplish the following: Note 1: This AD requires revisions to certain operator maintenance documents to include new replacements. Compliance with these replacements is required by 14 CFR 91.403(c). For airplanes that have been previously modified, altered, or repaired in the areas addressed by these replacements, the operator may not be able to accomplish the replacements described in the revisions. In this situation, to comply with 14 CFR 91.403(c), the operator must request approval for an alternative method of compliance in accordance with paragraph (e) of this AD. The request should include a description of changes to the required replacements that will ensure the continued damage tolerance of the affected structure. The FAA has provided guidance for this determination in Advisory Circular (AC) 25-1529. Revision to the Airworthiness Limitations Section of the Instructions for Continuing Airworthiness (a) Within 14 days after the effective date of this AD, revise the airworthiness limitations (AWL) section of the Instructions for Continued Airworthiness by inserting the instructions for Inspection Reference Numbers (IRN) J3220041, J3220042, and J3220043 (shear pins); as specified on page 2 of Chapter 4-11-00, Revision 32, dated June 13, 2003, of the Learjet 45 Maintenance Manual; into the AWL section. Thereafter, except as provided in paragraph (e) of this AD, no alternative replacement interval may be approved for the shear pins in the trunnion assemblies of the MLGs. Shear Pin Replacement (b) Prior to the accumulation of 1,800 total landings on the shear pins, or within 100 landings after the effective date of this AD, whichever occurs later: Replace the shear pins, having part number (P/N) 4532103015-001V1088, 4532103015-003, 4532103025-001V1088, or 4532103026-001V1088 located in the trunnion assemblies of the MLGs with new, improved shear pins (including reidentifying the trunnion assemblies); per the Accomplishment Instructions of Bombardier Service Bulletin 45-57-6, dated June 9, 2003. Parts Installation (c) As of the effective date of this AD, no person may install on any airplane, a shear pin having P/N 4532103015-001V1088, 4532103015-003, 4532103025-001V1088, or 4532103026-001V1088 in the trunnion assemblies of the MLGs. Information Submission (d) Although the service bulletin referenced in this AD specifies to submit information to the airplane manufacturer, this AD does not include such a requirement. Alternative Methods of Compliance (e) In accordance with 14 CFR 39.19, the Manager, Wichita Aircraft Certification Office (ACO), FAA, is authorized to approve alternative methods of compliance for this AD. Incorporation by Reference (f) Unless otherwise specified by this AD, the actions shall be done per Bombardier Service Bulletin 45-57-6, dated June 9, 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 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; 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 August 27, 2003. Issued in Renton, Washington, on August 4, 2003. Ali Bahrami, Acting Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 03-20238 Filed 8-11-03; 8:45 am] BILLING CODE 4910-13-P
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