AD 87-10-01

87-10-01 PRATT & WHITNEY CANADA: Amendment 39-5959. Final copy of priority letter AD. Applies to Pratt & Whitney Canada (PWC) JT15D-1, -1A, -1B, -4, -4B, and -4D turbofan engines.

Compliance is required as indicated, unless already accomplished.

To prevent failure of certain fan blades, accomplish the following within the next 15 calendar days or within the next 25 hours time in service from the effective date of this AD, whichever occurs first, and thereafter prior to the installation of any non-inspected fan blades:

(a) Visually inspect the fan blade root fillet radius, including the area on the airfoil one-half inch above the radius runout, for surface finish in accordance with the accomplishment instructions of PWC Service Bulletin (SB) Number 7257, Revision Number 2, dated July 2, 1987.

NOTE: Prior compliance with the accomplishment instructions of PWC SB Number 7257, dated April 23, 1987, is an equivalent means of compliance.

(b) Remove from service, fan blades which exhibit machining striations and replace with a serviceable part, prior to further flight.

(c) Aircraft may be ferried in accordance with the provisions of FAR 21.197 and 21.199 to a base where the AD can be accomplished.

(d) Upon request, an equivalent means of compliance with the requirements of this AD may be approved by the Manager, Engine Certification Office, Aircraft Certification Division, Federal Aviation Administration, New England Region, 12 New England Executive Park, Burlington, Massachusetts 01803.

(e) Upon submission of substantiating data by an owner or operator, through an FAA airworthiness inspector, the Manager, Engine Certification Office, New England Region, may adjust the compliance times specified in this AD.

PWC SB Number 7257, Revision Number 2, dated July 2, 1987, identified and described in this document is incorporated herein and made part hereof pursuant to 5 U.S.C. 552(a)(1). All persons affected by this directive whohave not already received this document from the manufacturer may obtain copies upon request to Pratt & Whitney Canada, Box 10, Longueuil, Quebec, Canada J4K 4X9. This document may also be examined at the Office of the Regional Counsel, Federal Aviation Administration, New England Region, 12 New England Executive Park, Burlington, Massachusetts 01803, Rules Docket Number 87-ANE-15, Room 311, between the hours of 8:00 a.m. and 4:30 p.m., Monday through Friday, except federal holidays.

This amendment, 39-5959, becomes effective July 15, 1988, as to all persons except those persons to whom it was made immediately effective by priority letter AD Number 87-10-01, issued May 7, 1987, which contained this amendment.