AD 82-16-10

82-16-10 PRATT & WHITNEY AIRCRAFT: Amendment 39-4417. Applies to all JT9D-20 engines installed in wing positions on DC-10-40 aircraft.

Compliance required on installed engines prior to March 31 1984, unless already accomplished.

To preclude "B" flange separation under adverse conditions, rework fan exit case assembly, incorporate riveted segmented strengthening plates along with improved "B" flange attachment hardware, and reidentify components in accordance with Pratt & Whitney JT9D-20 Service Bulletin No. 5335, dated September 3, 1981, or later revision approved by the Chief, Engine Certification Branch, FAA, New England Region.

NOTE: Rework, replacement, and addition of various airframe brackets are necessary to ensure compatibility with the flange modifications specified in Pratt & Whitney Aircraft Service Bulletin No. 5335.

All persons affected by this directive who have not already received the referenced service bulletin from the manufacturer may obtaincopies upon request to Pratt & Whitney Aircraft, Division of United Technologies Corporation, 400 Main Street, East Hartford, Connecticut 06108. This document may also be examined at Federal Aviation Administration, New England Region, 12 New England Executive Park, Burlington, Massachusetts 01803. A historical file on this AD which includes the material in full is maintained by the FAA at the New England Region Office.

This amendment becomes effective on August 16, 1982.