Airworthiness directives › 99-21-31
AD 99-21-31 Airworthiness Directives; Saab Model SAAB SF340A and SAAB 340B Series Airplanes
Models named: SAAB SF340A, SAAB 340B series. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
Model SAAB SF340A and SAAB 340B series airplanes, as listed in Saab Service Bulletin 340-76-042, dated May 28, 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 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 (c) 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 the cam screws of the engine power levers from backing out and interfering with the movement of the engine power levers, which could result in limited engine power, and consequent reduced controllability of the airplane, accomplish the following: (a) Within 1,200 flight hours or 6 months after the effective date of this AD, whichever occurs first, remove the control quadrant, secure the power lever cam screws with Loctite, and reinstall the control quadrant, in accordance with Saab Service Bulletin 340-76-042, dated May 28, 1998, including Attachments 1, 2, and 3, all dated May 1, 1998. (b) As of the effective date of this AD, no person shall install on any airplane any control quadrant unit having part number (P/N) 53082, 53162, or 53170, unless the control quadrant unit has been modified in accordance with this AD. Alternative Methods of Compliance (c) 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. Special Flight Permits (d) Special flight permits may be issued in accordance with Secs. 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. Incorporation by Reference (e) The actions shall be done in accordance with Saab Service Bulletin 340-76-042, dated May 28, 1998, including Attachment 1, dated May 1, 1998, Attachment 2, dated May 1, 1998, and Attachment 3, dated May 1, 1998, which contains the following list of effective pages: ------------------------------------------------------------------------ Revision level shown on Page Nos. page Date shown on page ------------------------------------------------------------------------ 1-4................. Original............... May 28, 1998. ------------------------------------------------------------------------ Attachment 1 1-4................. Original............... May 1, 1998. ------------------------------------------------------------------------ Attachment 2 1-4................. Original............... May 1, 1998. ------------------------------------------------------------------------ Attachment 3 1-4................. Original............... May 1, 1998. ------------------------------------------------------------------------ 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 Saab Aircraft AB, SAAB Aircraft Product Support, S-581.88, Linkoping, Sweden. 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 Swedish airworthiness directive 1-128, dated May 29, 1998. (f) This amendment becomes effective on November 24, 1999. Issued in Renton, Washington, on October 8, 1999. D.L. Riggin, Acting Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 99-26935 Filed 10-19-99; 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