AD 98-12-23 Airworthiness Directives; British Aerospace Model H.P. 137 Jetstream Mk. 1, Jetstream Model 3101, Jetstream Model 3201, and Jetstream 200 Series Airplanes

Models named: H.P. 137 Jetstream Mk. 1, Jetstream Model 3101, Jetstream Model 3201, Jetstream 200 series. Read the applicability below — it usually turns on serial or part numbers too.

Model H.P. 137 Jetstream Mk. 1, Jetstream Model 3101, Jetstream Model 3201, and Jetstream 200 series 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 [[Page 32121]] 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 in the body of this AD, unless already accomplished. To prevent the windshield wiper arm from corroding, detaching from the airplane during flight, and penetrating the fuselage, which, if not corrected, could result in possible injury to pilot and passengers; and to prevent collapse of the nose landing gear caused by design deficiency, which could result in loss of control of the airplane during landing operations, accomplish the following: (a) Within the next 90 days after the effective date of this AD, replace the windshield wiper arm and windshield wiper attachment bolt in accordance with the Accomplishment Instructions section in Jetstream Series 3100/3200 Service Bulletin (SB) 30-JA 950641, which incorporates the following pages: ------------------------------------------------------------------------ Pages Revision level Date ------------------------------------------------------------------------ 1............................... Revision 1........ March 18, 1997. 2 through 8..................... Revision 2........ March 18, 1997. ------------------------------------------------------------------------ This service bulletin specifies following the procedures provided in the Accomplishment Instructions section of Rosemount Aerospace Inc. Service Bulletin No. 2314M-30-16, dated December 1996. (b) Within the next 90 days after the effective date of this AD, measure the outer wall thickness of the nose landing gear (NLG) toggle bracket lugs and the axle bracket lugs in accordance with the Accomplishment Instructions in APPH Precision Hydraulics SB No. 32- 66, which incorporates the following pages: ------------------------------------------------------------------------ Pages Revision level Date ------------------------------------------------------------------------ 1, 3, 4, and 5.................. Revision 1........ October 1996. 2 and 6......................... Revision 2........ March 1997. ------------------------------------------------------------------------ Note 2: The APPH SB is referenced in the Accomplishment Instructions in Jetstream Series 3100/3200 Alert Service Bulletin No. 32-JA 960601, Revision No. 1, April 11, 1997, Original Issue, October 25, 1996. (1) Prior to further flight, replace the NLG toggle bracket lugs and axle bracket lugs, if the measurements of the outer wall thickness do not meet the criteria set out in the Table contained in paragraph B. (5) of the Accomplishment Instructions section in APPH Precision Hydraulics SB No. 32-66, as referenced in paragraph (b) of this AD. (2) If the measurements of the outer wall thickness are within the criteria set out in the Table contained in paragraph B. (5) of the Accomplishment Instructions section in APPH Precision Hydraulics SB 32-66, as referenced in paragraph (b) of this AD, replace the NLG toggle bracket lugs and axle bracket lugs at the end of the fatigue life limits of the part, as specified in the Table referenced above, or within the next 50 landings after the measurement is taken, whichever occurs later. Note 3: The compliance time in this AD takes precedence over the compliance times published in the applicable service bulletins. (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 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. (e) Questions or technical information related to the service information referenced in this AD should be directed to British Aerospace Regional Aircraft, Prestwick International Airport, Ayrshire, KA9 2RW, Scotland; telephone (01292) 79888; facsimile (01292) 671715. 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. (f) The replacements required by this AD shall be done in accordance with Jetstream Series 3100/3200 Service Bulletin 30-JA 950641, which incorporates the following pages: ------------------------------------------------------------------------ Pages Revision level Date ------------------------------------------------------------------------ 1............................... Revision 1........ March 18, 1997. 2 through 8..................... Revision 2........ March 18, 1997. ------------------------------------------------------------------------ This service bulletin specifies following the procedures provided in Rosemount Aerospace Inc. Service Bulletin No. 2314M-30- 16, dated December, 1996; --APPH Precision Hydraulics Service Bulletin No. 32-66, which incorporates the following pages: ------------------------------------------------------------------------ Pages Revision level Date ------------------------------------------------------------------------ 1, 3, 4, and 5.................. Revision 1........ October 1996. 2 and 6......................... Revision 2........ March 1997. ------------------------------------------------------------------------ This service bulletin is referenced in Accomplishment Instructions section of Jetstream Series 3100/3200 Alert Service Bulletin No. 32-JA 960601, Original Issue: October 25, 1996, Revision No. 1: dated April 11, 1997. (1) 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. (2) 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 5: The subject of this AD is addressed in British AD 002- 10-96, not dated, for the nose landing gear condition; and British AD 006-08-96, not dated, for the windshield wiper condition. (g) This amendment becomes effective on July 28, 1998. Issued in Kansas City, Missouri, on June 3, 1998. Ronald K. Rathgeber, Acting Manager, Small Airplane Directorate, Aircraft Certification Service. [FR Doc. 98-15360 Filed 6-11-98; 8:45 am] BILLING CODE 4910-13-U