AD 97-10-05 Airworthiness Directives; Jetstream Aircraft Limited HP137 Mk1, Jetstream Series 200, and Jetstream Models 3101 and 3201 Airplanes

Models named: 3101, 3201. Read the applicability below — it usually turns on serial or part numbers too.

HP 137 Mk1, Jetstream series 200, and Jetstream Models 3101 and 3201 airplanes (all serial numbers), certificated in any category, that are equipped with a main landing gear (MLG) incorporating one of the following part numbers (or FAA-approved equivalent): 1863 1863/4A 1863/4B 1863/4C 1864 1864/4A 1864/4B 1864/4C BOOA702850A BOOA702851A BOOA702925A BO1A702925A BOOA703065A BO1A703065A BOOA703030A BOOA702926A BO1A702926A BOOA703066A BO1A703066A BOOA703031A 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 (d) 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.

Required initially upon accumulating 8,000 landings on an affected MLG or within the next 100 landings after the effective date of this AD, whichever occurs later, unless already accomplished, and thereafter at intervals not to exceed 1,200 landings accumulated on an affected MLG. Note 2: If the number of landings is unknown, hours time-in- service (TIS) may be used by multiplying the number of hours TIS by 0.75. If hours TIS are utilized to calculate the number of landings, this would make the AD effective ``initially upon accumulating 10,667 hours TIS on an affected MLG or within the next 133 hours TIS after the effective date of this AD, whichever occurs later, and thereafter at intervals not to exceed to 1,600 hours TIS accumulated on an affected MLG.'' To prevent failure of the MLG caused by cracks in the pintle to cylinder interface area, which could result in loss of control of the airplane during landing operations, accomplish the following: (a) Inspect the MLG pintle to cylinder interface area for cracks in accordance with one of the following: (1) Using non-destructive testing (NDT) eddy current methods, in accordance with AP Precision Hydraulics Ltd. Service Bulletin 32-56, Revision 3, dated February 1995; or (2) Using fluorescent penetrant methods, in accordance with Appendix 1 in Jetstream Service Bulletin 32-JA 960142, dated March 15, 1996; or Appendix 2 in Jetstream Alert Service Bulletin 32-A-JA 941245, Revision 3, dated March 15, 1996, which incorporates the following pages: ---------------------------------------------------------------------------------------------------------------- Pages Revision level Date ---------------------------------------------------------------------------------------------------------------- 1 through 4.............................. Revision 3........................ March 15, 1996. 5 through 11............................. Revision 2........................ March 28, 1995. ---------------------------------------------------------------------------------------------------------------- (b) If any crack is found during any inspection required by this AD, prior to further flight, replace the MLG cylinder with a serviceable part in accordance with the applicable maintenance manual. Replacing the MLG cylinder does not eliminate the repetitive inspection requirement of this AD. Note 3: The ``prior to further flight'' replacement compliance time required by this AD if a MLG cylinder is cracked is different from the compliance times referenced in Jetstream Service Bulletin 32-JA 960142, dated March 15, 1996; Precision Hydraulics Ltd. Service Bulletin 32-56, Revision 3, dated February 1995, or Jetstream Alert Service Bulletin 32-A-JA 941245, Revision 3, dated March 15, 1996. This AD takes precedence over any service information. (c) 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. (d) An alternative method of compliance or adjustment of the initial and repetitive compliance times that provides an equivalent level of safety may be approved by the Manager, Brussels Aircraft Certification Division, Europe, Africa, Middle East office, FAA, c/o American Embassy, B-1000 Brussels, Belgium. The request should be forwarded through an appropriate FAA Maintenance Inspector, who may add comments and then send it to the Manager, Brussels Aircraft Certification Division. Note 4: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Brussels Aircraft Certification Division. (e) The inspections required by this AD shall be done in accordance with either Jetstream Service Bulletin 32-JA 960142, dated March 15, 1996; Precision Hydraulics Ltd. Service Bulletin 32- 56, Revision 3, dated February 1995; or Jetstream Alert Service Bulletin 32-A-JA 941245, Revision 3, dated March 15, 1996, which incorporates the following pages: ---------------------------------------------------------------------------------------------------------------- Pages Revision level Date ---------------------------------------------------------------------------------------------------------------- 1 through 4.............................. Revision 3........................ March 15, 1996. 5 through 11............................. Revision 2........................ March 28, 1995. ---------------------------------------------------------------------------------------------------------------- [[Page 28321]] 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 Jetstream Aircraft Limited, Manager Product Support, Prestwick Airport, Ayrshire, KA9 2RW Scotland; or Jetstream Aircraft Inc., Librarian, P.O. Box 16029, Dulles International Airport, Washington, DC, 20041-6029. Copies may be inspected at the FAA, Central Region, Office of the Assistant Chief 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. (f) This amendment (39-10017) becomes effective on July 11, 1997. Issued in Kansas City, Missouri, on May 2, 1997. Michael Gallagher, Manager, Small Airplane Directorate, Aircraft Certification Service. [FR Doc. 97-12023 Filed 5-22-97; 8:45 am] BILLING CODE 4910-13-U