AD 97-11-02 Airworthiness Directives; British Aerospace (Jetstream) Model 4101 Airplanes

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

Jetstream Model 4101 airplanes, as listed in Jetstream Alert Service Bulletin J41-A53-030, Revision 2, dated February 14, 1997; certificated in any category. [[Page 1738]] Note 1: This AD applies to each airplane identified in the preceding applicability provision, regardless of whether it has been otherwise 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 as indicated, unless accomplished previously. To prevent failure during emergency landing dynamic conditions of the intercostal that attaches the third crew member seat (``third crew seat'') to the floor structure in the flight compartment, which could consequently result in injury to the flight crew, accomplish the following: (a) Within 30 days after July 2, 1997 (the effective date of AD 97-11-02, amendment 39-10031), inspect the intercostal in the floor structure that supports the third crew seat in the flight compartment to determine the thickness of this part, in accordance with Part 1 of Jetstream Alert Service Bulletin J41-A53-030, dated January 19, 1996, Revision 1, dated August 8, 1996, or Revision 2, dated February 14, 1997. (b) If the thickness of the intercostal is 0.064 inch, no further action is required by this AD. (c) If the thickness of the intercostal is 0.048 inch, accomplish the actions specified in either paragraph (c)(1) or (c)(2) of this AD. (1) Prior to further flight, replace the intercostal with a new part manufactured from material having the correct thickness, in accordance with Jetstream Alert Service Bulletin J41-A53-030, dated January 19, 1996, Revision 1, dated August 8, 1996, or Revision 2, dated February 14, 1997. After replacement, no further action is required by this AD. Or (2) Prior to further flight, install a placard, in accordance with Jetstream Alert Service Bulletin J41-A53-030, dated January 19, 1996, Revision 1, dated August 8, 1996, or Revision 2, dated February 14, 1997, to prohibit use of the third crew seat when the total weight of carry-on items stored in the forward right stowage area is more than 100 pounds. Within 6 months after installation of the placard, replace the intercostal with a new part manufactured from material having the correct thickness, in accordance with any of the service bulletins. After installation of the new intercostal, the placard may be removed. (d) An alternative method of compliance or adjustment of the compliance time that provides an acceptable level of safety may be used if approved by the Manager, International Branch, ANM-116, FAA, Transport Airplane Directorate. Operators shall submit their requests through an appropriate FAA Principal Maintenance Inspector, who may add comments and then send it to the Manager, International Branch, ANM-116. Note 2: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the International Branch, ANM-116. (e) 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. (f) The actions shall be done in accordance with Jetstream Alert Service Bulletin J41-A53-030, dated January 19, 1996; Jetstream Alert Service Bulletin J41-A53-030, Revision 1, dated August 8, 1996; and Jetstream Alert Service Bulletin J41-A53-030, Revision 2, dated February 14, 1997. (1) The incorporation by reference of Jetstream Alert Service Bulletin J41-A53-030, Revision 1, dated August 8, 1996; and Jetstream Alert Service Bulletin J41-A53-030, Revision 2, dated February 14, 1997; is approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. These Jetstream alert service bulletins contain the following list of effective pages: ---------------------------------------------------------------------------------------------------------------- Service bulletin referenced and Revision level shown date Page No. on page Date shown on page ---------------------------------------------------------------------------------------------------------------- J41-A53-030, Revision 1, August 8, 1, 3 1.................... August 8, 1996. 1996. 2, 4-7 Original............. January 19, 1996. J41-A53-030, Revision 2, February 1, 3 2.................... February 14, 1997. 14, 1997. 2, 4-7 Original............. January 19, 1996. ---------------------------------------------------------------------------------------------------------------- (2) The incorporation by reference of Jetstream Alert Service Bulletin J41-53-030, dated January 19, 1996, was approved previously by the Director of the Federal Register as of July 2, 1997 (62 FR 28795, May 28, 1997). (3) Copies may be obtained from AI(R) American Support, Inc., 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 3: The subject of this AD is addressed in British airworthiness directive 006-01-96. (g) This amendment becomes effective on February 17, 1998. Issued in Renton, Washington, on December 30, 1997. Darrell M. Pederson, Acting Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 98-208 Filed 1-9-98; 8:45 am] BILLING CODE 4910-13-P