AD 2005-23-18 Airworthiness Directives; Fokker Model F27 Mark 050 Airplanes

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

This AD applies to all Fokker Model F27 Mark 050 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. General Visual Inspection (f) At the applicable compliance time specified in paragraph (f)(1) or (f)(2) of this AD, do a general visual inspection of the bleed air supply to determine if blanking plugs are present and a general visual inspection of the entire area of the engine nacelle for any heat damage, and do any corrective actions as applicable, by accomplishing all of the applicable actions specified in parts B and C of the Accomplishment Instructions of Fokker Service Bulletin SBF50-36-006, dated October 1, 2001; except as provided by paragraph (g) of this AD. Any corrective actions must be done before further flight. Note 1: For the purposes of this AD, a general visual inspection is: “A visual examination of an interior or exterior area, installation, or assembly to detect obvious damage, failure, or irregularity. This level of inspection is made from within touching distance unless otherwise specified. A mirror may be necessary to ensure visual access to all surfaces in the inspection area. This level of inspection is made under normally available lighting conditions such as daylight, hangar lighting, flashlight, or droplight and may require removal or opening of access panels or doors. Stands, ladders, or platforms may be required to gain proximity to the area being checked.” (1) For airplanes that have accumulated 20,000 total flight hours or more as of the effective date of this AD: Within 6 months after the effective date of this AD. (2) For airplanes that have accumulated less than 20,000 total flight hours as of the effective date of this AD: Within 12 months after the effective date of this AD. (g) If, during accomplishment of the corrective actions required by paragraph (f) of this AD, the service bulletin requires contacting the manufacturer for instructions on repairing heat damage to a component, wiring, or structure: Before further flight, repair according to a method approved by either the Manager, International Branch, ANM-116, FAA, Transport Airplane Directorate; or the Civil Aviation Authority—The Netherlands (or its delegated agent). Modification (h) Before further flight after accomplishing the inspection required by paragraph (f) of this AD: Replace the blanking plugs of the bleed air supply ducts with clamping devices, in accordance with Part D of the Accomplishment Instructions of Fokker Service Bulletin SBF50-36-006, dated October 1, 2001. Alternative Methods of Compliance (AMOCs) (i)(1) 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. (2) Before using any AMOC approved in accordance with 14 CFR 39.19 on any airplane to which the AMOC applies, notify the appropriate principal inspector in the FAA Flight Standards Certificate Holding District Office. Related Information (j) Dutch airworthiness directive 2001-130, dated October 31, 2001, also addresses the subject of this AD. Material Incorporated by Reference (k) You must use Fokker Service Bulletin SBF50-36-006, dated October 1, 2001, to perform the actions that are required by this AD, unless the AD specifies otherwise. The Director of the Federal Register approved the incorporation by reference of this document in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Contact Fokker Services B.V., P.O. Box 231, 2150 AE Nieuw-Vennep, the Netherlands, for a copy of this service information. You may review copies at the Docket Management Facility, U.S. Department of Transportation, 400 Seventh Street, SW., room PL-401, Nassif Building, Washington, DC; on the Internet at http://dms.dot.gov; or at 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. Issued in Renton, Washington, on November 7, 2005. Kalene C. Yanamura, Acting Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 05-22589 Filed 11-15-05; 8:45 am] BILLING CODE 4910-13-P

This AD results from heat damage in areas adjacent to the bleed air supply duct assembly. We are issuing this AD to prevent rupture of the bleed air supply duct, which could lead to hot bleed air leaking into the engine controls area and result in heat damage to control cables, electrical wiring, hydraulic components, and fuel lines, and consequent fire.