Airworthiness directives › 98-21-14
AD 98-21-14 Airworthiness Directives; British Aerospace Jetstream Model 3101 Airplanes
Models named: 3101. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
Jetstream Model 3101 airplanes, serial numbers 703, 705, and 707, certificated in any category. Note 1: This AD applies to each airplane identified in the preceding applicability provision, regardless of whether it has been modified, altered, or repaired in the area subject to the requirements of this AD. For airplanes that have been modified, altered, or repaired so that the performance of the requirements of this AD is affected, the owner/operator must request approval for an alternative method of compliance in accordance with paragraph (e) of this AD. The request should include an assessment of the effect of the modification, alteration, or repair on the unsafe condition addressed by this AD; and, if the unsafe condition has not been eliminated, the request should include specific proposed actions to address it.
Compliance
Required prior to further flight after the effective date of this AD, unless already accomplished. To prevent a cross connection in the No. 1 and No. 2 vertical gyroscopes, which could result in navigational errors during flight, accomplish the following: (a) Modify the navigation system by shortening and re-clipping the cable looms on the No. 1 and No. 2 vertical gyroscope in accordance with the Accomplishment Instructions section of Jetstream Service Bulletin No. 34-JA 891143, dated March 2, 1990. (b) Install a warning label, part number JA-891143-K1 or an FAA- approved equivalent part number, adjacent to the No. 1 and No. 2 vertical gyroscope in accordance with the Accomplishment Instructions section of Jetstream Service Bulletin No. 34-JA 891143, dated March 2, 1990. (c) Perform an operational check of the No. 1 and No. 2 vertical gyroscope in accordance with the Accomplishment Instructions section of Jetstream Service Bulletin No. 34-JA 891143, dated March 2, 1990. If the vertical gyroscopes do not operate correctly, prior to further flight, correct any discrepancies in accordance with the Accomplishment Instructions section of Jetstream Service Bulletin No. 34-JA 891143, dated March 2, 1990. (d) Special flight permits may be issued in accordance with 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. (e) An alternative method of compliance or adjustment of the compliance time that provides an equivalent level of safety may be approved by the Manager, Small Airplane Directorate, Aircraft Certification Service, 1201 Walnut, suite 900, Kansas City, Missouri 64106. The request shall be forwarded through an appropriate FAA Maintenance Inspector, who may add comments and then send it to the Manager, Small Airplane Directorate. Note 2: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Small Airplane Directorate. (f) Questions or technical information related to British Aerospace Jetstream SB 34-JA 891143, dated March 2, 1990, should be directed to British Aerospace Regional Aircraft, Prestwick International Airport, Ayrshire, KA9 2RW, Scotland; telephone: (01292) 479888; facsimile: (01292) 479703. This service information may be examined at the FAA, Central Region, Office of the Regional Counsel, Room 1558, 601 E. 12th Street, Kansas City, Missouri 64106. (g) The modification and operational check required by this AD shall be done in accordance with British Aerospace Jetstream Service Bulletin 34-JA 891143, dated March 2, 1990. 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, Prestwick International Airport, Ayrshire, KA9 2RW, Scotland. Copies may be inspected at the FAA, Central Region, Office of the Regional Counsel, Room 1558, 601 E. 12th Street, Kansas City, Missouri, or at the Office of the Federal Register, 800 North Capitol Street, NW, suite 700, Washington, DC. Note 3: The subject of this AD is addressed in British Aerospace Jetstream SB 34-JA 891143, dated March 2, 1990. This service bulletin is classified as mandatory by the United Kingdom Civil Aviation Authority (CAA). (h) This amendment becomes effective on November 2, 1998. Issued in Kansas City, Missouri, on September 30, 1998. Michael Gallagher, Manager, Small Airplane Directorate, Aircraft Certification Service. [FR Doc. 98-26969 Filed 10-9-98; 8:45 am] BILLING CODE 4910-13-P
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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