AD 2005-13-32 Airworthiness Directives; Fokker Model F.28 Mark 1000, 2000, 3000, and 4000 Airplanes

Models named: F.28 Mark 1000, 2000, 3000, 4000. Read the applicability below — it usually turns on serial or part numbers too.

This AD applies to all Fokker Model F.28 Mark 1000, 2000, 3000, and 4000 airplanes, certificated in any category.

You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done. Inspection and Corrective Actions (f) Within 12 months or 3,000 flight cycles after the effective date of this AD, whichever occurs first, do a detailed inspection of the reinforcing strap of the left- and right-hand wings' lower skin at wing station (WS) 2635 for improperly installed bushings, in accordance with the Accomplishment Instructions of Fokker Service Bulletin F28/57-93, dated December 22, 2003. Note 1: For the purposes of this AD, a detailed inspection is: “An intensive examination of a specific item, installation, or assembly to detect damage, failure, or irregularity. Available lighting is normally supplemented with a direct source of good lighting at an intensity deemed appropriate. Inspection aids such as mirror, magnifying lenses, etc. , may be necessary. Surface cleaning and elaborate procedures may be required.” (1) If no improperly installed bushing is found, no further action is required by this AD. (2) If any improperly installed bushing is found, before further flight: (i) Repair the bushing in accordance with the Accomplishment Instructions of Fokker Service Bulletin F28/57-93, dated December 22, 2003; and (ii) Replace the reinforcing strap with a new reinforcing strap in accordance with the Accomplishment Instructions of Fokker Service Bulletin F28/57-96, dated December 22, 2003. Alternative Methods of Compliance (AMOCs) (g) The Manager, International Branch, ANM-116, Transport Airplane Directorate, FAA, has the authority to approve AMOCs for this AD, if requested in accordance with the procedures found in 14 CFR 39.19. Related Information (h) Dutch airworthiness directive 2004-021, dated February 27, 2004, also addresses the subject of this AD. Material Incorporated by Reference (i) You must use the service information listed in Table 1 of this AD to perform the actions that are required by this AD, unless the AD specifies otherwise. The Director of the Federal Register approves the incorporation by reference of these documents in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. To get copies of the service information, contact Fokker Services B.V., P.O. Box 231, 2150 AE Nieuw- Vennep, the Netherlands. To view the AD docket, go to the Docket Management Facility, U.S. Department of Transportation, 400 Seventh Street SW, room PL-401, Nassif Building, Washington, DC. To review copies of the service information, go to the National Archives and Records Administration (NARA). For information on the availability of this material at the NARA, call (202) 741-6030, or go to http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html. Table 1.—Material Incorporated by Reference Fokker Service Bulletin Revision level Date F28/57-93 Original Dec. 22, 2003. F28/57-96 Original Dec. 22, 2003. Issued in Renton, Washington, on June 14, 2005. Kevin M. Mullin, Acting Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 05-12504 Filed 6-24-05; 8:45 am] BILLING CODE 4910-13-P

This AD was prompted by a report that bushings were installed in accordance with improper procedures in the structural repair manual. We are issuing this AD to detect and correct improperly installed bushings which could result in reduced tensile strength of the reinforcing strap of the wing's lower skin, and consequently a reduction of the structural capability of the wing and possible wing failure.