AD 98-20-07 Airworthiness Directives; British Aerospace (Jetstream) Model 4101 Airplanes

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

Model Jetstream 4101 airplanes, constructors numbers 41004 through 41100 inclusive; 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 (b) of this AD. The request should include an assessment of the effect of the modification, alteration, or [[Page 50139]] 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 of hose assemblies, which could prevent the proper distribution of fire extinguishing agent within the engine nacelle in the event of a fire, accomplish the following: (a) Within 30 days after the effective date of this AD, perform a one-time detailed visual inspection to determine the data on the label of the two hose assemblies having part number 14191001-56, in accordance with Jetstream Alert Service Bulletin J41-A26-007, Revision 1, dated May 21, 1997. (1) If the data on any hose assembly are not identical to the data shown on either Label 1 or Label 2 of Figure 2 of the Accomplishment Instructions of the alert service bulletin, no further action is required by this AD. (2) If the data on any hose assembly are identical to the data shown on either Label 1 or Label 2 of Figure 2 of the Accomplishment Instructions of the alert service bulletin, prior to the accumulation of 60 flight hours following accomplishment of the inspection required by paragraph (a) of this AD, replace the hose assembly with a new hose assembly that has different data on the identification label, in accordance with the alert service bulletin. (b) 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. (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) The inspection and replacement shall be done in accordance with Jetstream Alert Service Bulletin J41-A26-007, Revision 1, dated May 21, 1997. This incorporation by reference is 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 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. (e) This amendment becomes effective on October 26, 1998. Issued in Renton, Washington, on September 11, 1998. Dorenda D. Baker, Acting Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 98-24907 Filed 9-18-98; 8:45 am] BILLING CODE 4910-13-U