Airworthiness directives › 99-07-09
AD 99-07-09 Airworthiness Directives; British Aerospace Jetstream Model 3201 Airplanes
Models named: 3201. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
Jetstream Model 3201 airplanes, constructor numbers 841, 842, 844 through 848, 851, 853 through 855, 857, 859 through 862, and 864; 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
Required at whichever of the following occurs later, unless already accomplished: 1. Upon accumulating 8,000 landings on the airplane or within 5 years since the last time the hydraulic system components were replaced (see paragraph (a) of this AD for listing of components), whichever occurs first; or 2. Within the next 12 calendar months after the effective date of this AD. Note 2: If the number of landings is unknown, hours time-in- service (TIS) may be used by dividing 8,000 by 0.75. If hours TIS are utilized to calculate the number of landings, this would calculate the 8,000 landings compliance time to 10,667 hours TIS. To prevent internal corrosion of the hydraulic components on airplanes where these components were exposed to water contamination, which could result in reduced or loss of control of the airplane, accomplish the following: (a) Replace the following critical components of the hydraulic system, in accordance with the applicable maintenance manual, as specified in Jetstream Alert Service Bulletin 29-A-JA 970940, Original Issue: February 4, 1998, or Jetstream Alert Service Bulletin 29-A-JA 970940, Original Issue: February 4, 1998, Revision No. 1: January 27, 1999: (1) The nose landing gear downlock actuator; (2) The flap actuator; (3) The steering selector valve; (4) The hydraulic reservoir; and (5) The emergency selector valve. Note 3: The FAA highly recommends replacing the hydraulic fluid while these system components are being replaced, as specified in Jetstream Alert Service Bulletin 29-A-JA 970940, Original Issue: February 4, 1998, or Jetstream Alert Service Bulletin 29-A-JA 970940, Original Issue: February 4, 1998, Revision No. 1: January 27, 1999. (b) Special flight permits may be issued in accordance with Secs. 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 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 4: 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 Alert Service Bulletin 29-A-JA 970940, Original Issue: February 4, 1998, or Jetstream Alert Service Bulletin 29-A-JA 970940, Original Issue: February 4, 1998, Revision No. 1: January 27, 1999, 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 5: The subject of this AD is addressed in British AD 001- 02-98, not dated. (e) This amendment becomes effective on May 10, 1999. Issued in Kansas City, Missouri, on March 18, 1999. Michael Gallagher, Manager, Small Airplane Directorate, Aircraft Certification Service. [FR Doc. 99-7381 Filed 3-25-99; 8:45 am] BILLING CODE 4910-13-U
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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