AD 2004-08-11 Airworthiness Directives; BAE Systems (Operations) Limited (Jetstream) Model 4101 Airplanes

Models named: Jetstream 4101. Read the applicability below — it usually turns on serial or part numbers too.

All Model Jetstream 4101 airplanes, certificated in any category.

Required as indicated, unless accomplished previously. To prevent failure of the steering pinion in the nose landing gear (NLG), which could result in a loss of steering and possible damage to the airplane during takeoff and landing, accomplish the following: Identification of Steering Pinion Part Number and Follow-on/Corrective Actions (a) Within 60 days after the effective date of this AD: Do a review of the airplane maintenance records and a general visual inspection of the NLG to identify the part number (P/N) of the steering pinion, and to determine the total cycles since new and since overhaul of the NLG, by accomplishing all of the applicable actions in accordance with Part 1 of the Accomplishment Instructions of BAE Systems (Operations) Limited Service Bulletin J41-32-076, dated July 3, 2001. Note 1: For the purposes of this AD, a general visual inspection is defined as: “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 enhance visual access to all exposed 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.” (b) If the steering pinion P/N is identified as AIR136088, and the NLG has more than 12,000 total landings since new or overhaul: Before further flight, after accomplishing the actions required by paragraph (a) of this AD, install a temporary placard prohibiting pushback with engines running in accordance with Part 1 of the Accomplishment Instructions of BAE Systems (Operations) Limited Service Bulletin J41-32-076, dated July 3, 2001. (c) Based on the criteria in the Accomplishment Instructions of BAE Systems (Operations) Limited Service Bulletin J41-32-076, dated July 3, 2001, if it is determined that the NLG must be replaced with a serviceable NLG, accomplish the replacement in accordance with the Accomplishment Instructions of the service bulletin. Do the replacement at the later of the times specified in paragraphs (c)(i) and (c)(ii) of this AD. After replacement of an existing NLG, the temporary placard required by paragraph (b) of this AD may be removed from the airplane. (i) Prior to the accumulation of 12,000 total landings on the NLG since new or overhaul. (ii) Within 1,000 landings or 16 months after the effective date of this AD, whichever occurs first. Repetitive Replacement (d) After the initial replacement of a NLG as required by paragraph (c) of this AD: Replace the NLG with a serviceable NLG thereafter at intervals not to exceed 12,000 landings on the NLG, until accomplishment of paragraph (f) of this AD. (e) If P/N AIR131714 is installed on the airplane, or if an operator installs this P/N as a serviceable replacement part, this part must be replaced at or before the accumulation of 19,000 total landings on the part, and thereafter at intervals not to exceed 19,000 total landings on the part, until accomplishment of paragraph (f) of this AD. (f) Replacement of a NLG with a new NLG having P/N AIR83586-18, or any P/N AIR83586-xx (where xx represents the “dash” number of the part) with “mod 19 strike-off” recorded on the nameplate, in accordance with the Accomplishment Instructions of BAE Systems (Operations) Limited Service Bulletin J41-32-077, dated August 31, 2001, restores the life limits of the steering pinion to 60,000 landings on the NLG. Replace the NLG thereafter at intervals not to exceed 60,000 landings on the NLG. Submission of Information to Manufacturer Not Required (g) Although the service bulletins referenced in this AD specify to notify the manufacturer when the actions in the service bulletins have been accomplished, this AD does not include such a requirement. Alternative Methods of Compliance (h) In accordance with 14 CFR 39.19, the Manager, International Branch, ANM-116, Transport Airplane Directorate, FAA, is authorized to approve alternative methods of compliance for this AD. Incorporation by Reference (i) Unless otherwise specified in this AD, the actions shall be done in accordance with BAE Systems (Operations) Limited Service Bulletin J41-32-076, dated July 3, 2001; and BAE Systems (Operations) Limited Service Bulletin J41-32-077, dated August 31, 2001; as applicable. 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 British Aerospace Regional Aircraft American Support, 13850 Mclearen Road, Herndon, Virginia 20171. Copies may be inspected at the FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington; or at the Office of the Federal Register, 800 North Capitol Street, NW., suite 700, Washington, DC. Note 2: The subject of this AD is addressed in British airworthiness directive 001-07-2001. Effective Date (j) This amendment becomes effective on May 26, 2004. Issued in Renton, Washington, on April 9, 2004. Ali Bahrami, Acting Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 04-8761 Filed 4-20-04; 8:45 am] BILLING CODE 4910-13-P