Airworthiness directives › 98-21-07
AD 98-21-07 Airworthiness Directives; British Aerospace Model Avro 146-RJ85A and RJ100A Series Airplanes
Models named: Avro 146-RJ85A, RJ100A series. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
Model Avro 146-RJ85A and RJ100A series airplanes, as listed in British Aerospace Service Bulletin SB.57-55, dated April 27, 1998, 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 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 as indicated, unless accomplished previously. To prevent reduced wing strength and stiffness, and the onset of premature fatigue cracking, which could result in reduced structural integrity of the airplane, accomplish the following: (a) Within 6 months after the effective date of this AD, perform a one-time detailed visual inspection for evidence of machining (undercutting) into the web of the integral stringers of the bottom skin of the wings, in accordance with British Aerospace Service Bulletin SB.57-55, dated April 27, 1998. (1) If no machining into the web is detected, no further action is required by this AD. (2) If any machining into the web is detected, prior to further flight, measure the thickness of the web of the integral stringer in accordance with the service bulletin. (i) If the web thickness is 0.099 inch or more, no further action is required by this AD. (ii) If the web thickness is less than 0.099 inch, prior to further flight, repair in accordance with a method approved by either the Manager, International Branch, ANM-116, FAA, Transport Directorate, or the Civil Aviation Authority (or its delegated agent). (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. 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) Except as provided by paragraph (a)(2)(ii) of this AD, the actions shall be done in accordance with British Aerospace Service Bulletin SB.57-55, dated April 27, 1998, which contains the following list of effective pages: ------------------------------------------------------------------------ Revision level Page No. shown on page Date shown on page ------------------------------------------------------------------------ 1-4............................. Original.......... April 27, 1998. 5-6............................. X................. Not Dated. ------------------------------------------------------------------------ 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 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 November 10, 1998. Issued in Renton, Washington, on September 28, 1998. Darrell M. Pederson, Acting Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 98-26390 Filed 10-5-98; 8:45 am] BILLING CODE 4910-13-P
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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