AD 96-07-04 Airworthiness Directives; Fokker Model F27 Mark 050 and Model F28 Mark 0100 Series Airplanes

Models named: F27 Mark 050 series, F28 Mark 0100 series. Read the applicability below — it usually turns on serial or part numbers too.

Model F27 Mark 050 series airplanes having serial numbers 20247 through 20292 inclusive, and 20294 through 20297 inclusive; and Model F28 Mark 0100 series airplanes having serial numbers 11390 through 11479 inclusive; 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 electrical arcing and subsequent loss of the associated electrical system, which could result in the potential for an electrical fire, accomplish the following: (a) Within 12 months after the effective date of this AD, perform an inspection to verify if adequate clearance exists between the insulation screen and the two adjacent terminal bolts in accordance with Fokker Service Bulletin SBF100-20-001, dated January 15, 1994 (for Model F28 Mark 0100 series airplanes), or Fokker Service Bulletin SBF50-20-003, dated January 11, 1994 (for Model F27 Mark 050 series airplanes), as applicable. (1) If adequate clearance is found, no further action is required by this AD. (2) If inadequate clearance is found, prior to further flight, replace the circuit breaker terminal bolts with new bolts in accordance with the applicable service bulletin. (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, Standardization Branch, ANM-113, 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, Standardization Branch, ANM-113. Note 2: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Standardization Branch, ANM-113. (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. (d) The inspection and replacement shall be done in accordance with Fokker Service Bulletin SBF100-20-001, dated January 15, 1994, or Fokker Service Bulletin SBF50-20-003, dated January 11, 1994, 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 Aircraft USA, Inc., 1199 North Fairfax Street, Alexandria, Virginia 22314. 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. (e) This amendment becomes effective on April 29, 1996. Issued in Renton, Washington, on March 21, 1996. Darrell M. Pederson, Acting Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 96-7400 Filed 3-28-96; 8:45 am] BILLING CODE 4910-13-P