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99-15-11 BRITISH AEROSPACE: Amendment 39-11231; Docket No. 98-CE-115-AD.
Applicability: HP137 Mk1, Jetstream Series 200, and Jetstream Models 3101 and 3201 airplanes, all serial numbers, 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 (c) 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: Upon accumulating 10,000 hours time-in-service (TIS) on the nose landing gear selector valve or within the next 12 calendar months after the effective date of this AD, whichever occurs later, unless already accomplished; and thereafter each time 10,000 hours TIS is accumulated on a nose landing gear selector valve.
To prevent the inability to steer the airplane because of wear in the nose landing gear steering selector differential, which could result in loss of control of the airplane during take-off, landing, or taxi operations, accomplish the following:
(a) Remove the nose landing gear steering selector valve, part number (P/N) 8668C or AIR86002-0 (or FAA-approved equivalent part number), and install one of the following in accordance with the applicable maintenance manual, as specified in British Aerospace Jetstream Service Bulletin 32-JA980841, Original Issue: October 28, 1998:
(1) A new steering selector valve, P/N 8668C or AIR86002-0 (or FAA-approved equivalent part number); or
(2) An FAA-approved nose landing gear steering selector valve that has been overhauled in accordance with the appropriate component maintenance manual.
NOTE 2: The FAA is requiring in another action (Docket No. 98-CE-117-AD) a one-time inspection of the nose wheel steering system to assure that the free play between the steering handle or knob and the nose wheels is within acceptable limits, with adjustment as necessary.
(b) 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.
(c) An alternative method of compliance or adjustment of the initial or repetitive compliance times 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 3: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Small Airplane Directorate.
(d) Questions or technical information related to British Aerospace Jetstream Service Bulletin 32-JA980841, Original Issue: October 28, 1998, 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.
NOTE 4: The subject of this AD is addressed inBritish Aerospace Jetstream Alert Service Bulletin 32-JA980841, Original Issue: October 28, 1998. This service bulletin is classified as mandatory by the United Kingdom Civil Aviation Authority (CAA).
(e) This amendment becomes effective on September 10, 1999.
