AD 2000-01-15 Airworthiness Directives; Fokker Model F27 Mark 050 Series Airplanes

Models named: F27 Mark 050 series. Read the applicability below — it usually turns on serial or part numbers too.

All Model F27 Mark 050 series airplanes, 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 (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.

Required as indicated, unless accomplished previously. To prevent reduced controllability of the airplane as a result of interruption of the anti-skid system function, or inadvertent selection of reverse thrust during a rejected takeoff, accomplish the following: Modification for Certain Airplanes (a) For Model F27 Mark 050 series airplanes equipped with Pratt & Whitney Model PW127B engines: Within 12 months after the effective date of this AD, modify the electrical power supply of the landing gear anti-skid unit in accordance with Fokker Service Bulletin SBF50-32-031, dated December 20, 1996. Airplane Flight Manual Revision and Installation For Certain Airplanes (b) For Model F27 Mark 050 series airplanes, as listed in Fokker Service Bulletin SBF50-76-016, dated December 20, 1996: Accomplish the actions specified in paragraphs (b)(1) and (b)(2) of this AD. (1) Within 10 days after the effective date of this AD, revise the Limitations Section of the FAA-approved Airplane Flight Manual (AFM) to include the following statement. This may be accomplished by inserting a copy of this AD in the AFM. ``Correct the `available accelerate-stop distance' as follows: For dry runways, multiply the relevant figure by 0.9; For wet runways, subtract 525 feet (160 meters) from the relevant figure; and For contaminated and slippery runways, subtract 1,181 feet (360 meters) from the relevant figure. Additionally, the required accelerate-stop distance, as calculated from the AFM for a given airplane weight and V1 or Vstop must be increased in accordance with the same factors given for available accelerate-stop distance, as shown above.'' (2) Within 12 months after the effective date of this AD, install a new ground idle stop assembly and new placards on the top cover of the pedestal, in accordance with Fokker Service Bulletin SBF50-76-016, dated December 20, 1996. Following accomplishment of these actions, the AFM revision required by paragraph (b)(1) of this AD may be removed from the AFM. 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 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. Incorporation by Reference (e) The actions required by paragraphs (a) and (b)(2) of this AD shall be done in accordance with Fokker Service Bulletin SBF50-76- 016, dated December 20, 1996, and Fokker Service Bulletin SBF50-32- 031, dated December 20, 1996; as applicable. 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 Fokker Services B.V., P.O. Box 231, 2150 AE Nieuw- Vennep, the Netherlands. 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 Dutch airworthiness directives 1996-149 (A), and 1996-150 (A), both dated December 31, 1996. (f) This amendment becomes effective on January 31, 2000. Issued in Renton, Washington, on January 7, 2000. Donald L. Riggin, Acting Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 00-877 Filed 1-13-00; 8:45 am] BILLING CODE 4910-13-U