AD 98-11-02 Airworthiness Directives; Fokker Model F28 Mark 0070 and Mark 0100 Series Airplanes

Models named: F28 Mark 0070, Mark 0100 series. Read the applicability below — it usually turns on serial or part numbers too.

All Model F28 Mark 0070 and Mark 0100 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 (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.

Required as indicated, unless accomplished previously. To prevent inadvertent deployment of the liftdumpers during approach for landing, and consequent reduced controllability and performance of the airplane, accomplish the following: (a) Within 5 days after the effective date of this AD, revise the Limitations and Normal Procedures sections of the FAA-approved Airplane Flight Manual (AFM) in accordance with paragraphs (a)(1) and (a)(2) of this AD. This may be accomplished by inserting a copy of this AD in the AFM. (1) Add the following information to section 5--NORMAL PROCEDURES, sub-Section APPROACH AND LANDING, after the subject APPROACH: ``BEFORE LANDING WARNING: DO NOT ARM THE LIFTDUMPER SYSTEM BEFORE LANDING GEAR DOWN SELECTION. Selecting Landing Gear DOWN after arming the liftdumper system may result in inadvertent deployment of the liftdumpers, because the liftdumper arming test may be partially ineffective.'' (2) Add the following information to the LIMITATIONS section: ``LIFTDUMPER SYSTEM DO NOT ARM THE LIFTDUMPER SYSTEM BEFORE LANDING GEAR DOWN SELECTION.'' (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. Note 3: The subject of this AD is addressed in Dutch airworthiness directive 1998-042 (A), dated April 10, 1998. (d) This amendment becomes effective on June 2, 1998. Issued in Renton, Washington, on May 11, 1998. Darrell M. Pederson, Acting Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 98-13062 Filed 5-15-98; 8:45 am] BILLING CODE 4910-13-V