Airworthiness directives › 99-20-01
AD 99-20-01 Airworthiness Directives; Fokker Model F.28 Mark 0070 and 0100 Series Airplanes
Models named: F.28 Mark 0070, 0100 series. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
All Model F.28 Mark 0070 and 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 (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 certain nuisance alerts generated by the flight warning computer (FWC) and to ensure annunciation of certain flight alerts by the FWC during initial climb, which could result in an improper response by the flight crew and consequent reduced controllability of the airplane, accomplish the following: Modifications (a) Within 18 months after the effective date of this AD, modify the electrical wiring of the FWC in accordance with Part 1 or 2, as applicable, of the Accomplishment Instructions of Fokker Service Bulletin SBF100-31-047, Revision 1, dated March 21, 1997. Note 2: It is not necessary to install computer software version V10.40 into the FWC, since a later version is available and is required to be installed by this AD. (b) Concurrent with the accomplishment of the requirements of paragraph (a) of this AD, install upgraded computer software version V11.45 into the FWC in accordance with Fokker Service Bulletin SBF100-31-051, dated August 15, 1998. Note 3: AlliedSignal Grimes Aerospace has issued Service Bulletin 80-0610-31-0031, dated May 14, 1998, as an additional source of service information for installation of the upgraded computer software version into the FWC. Note 4: Operators should note that Fokker Service Bulletin SBF100-31-051, dated August 15, 1998, specifies prior or concurrent accomplishment of Fokker Service Bulletin SBF100-78-014 [which specifies concurrent accomplishment of Fokker Component Service Bulletin (CSB) P41440-78-04, and prior or concurrent accomplishment of Fokker Service Bulletin SBF100-78-012 and CSB P41440-78-05]. Related FAA Rules Docket No. 98-NM-329-AD requires accomplishment of these four other service bulletins. 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 5: 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 shall be done in accordance with Fokker Service Bulletin SBF100-31-047, Revision 1, dated March 21, 1997, and Fokker Service Bulletin SBF100-31-051, dated August 15, 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 Fokker Services B.V., P.O. Box 231, 2150 AE Nieuw-Vennep, The [[Page 51205]] 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 6: The subject of this AD is addressed in Dutch airworthiness directive BLA 1998-110, dated August 31, 1998. (f) This amendment becomes effective on October 27, 1999. Issued in Renton, Washington, on September 13, 1999. D. L. Riggin, Acting Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 99-24278 Filed 9-21-99; 8:45 am] BILLING CODE 4910-13-U
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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