AD 82-13-03

82-13-03 DETROIT DIESEL ALLISON: Amendment 39-4403. Applies to all Models 250-C20 and -C20B engines equipped with the Chandler Evans Company (CECO) Model MC-40 fuel control system. Compliance required as indicated unless already accomplished. To prevent possible power turbine overspeed, accomplish the following at the next engine or CECO fuel control/power turbine governor overhaul, but not later than October 1, 1982: Modify the engine high pressure fuel control filter assembly, P/N 6895173 or P/N 6896727, into P/N 6899279 in accordance with the detailed instructions provided in Detroit Diesel Allison Commercial Engine Alert Bulletin CEB-A-1144, Revision 3, dated March 1, 1982, or later FAA approved revision. Upon request of the operator, an equivalent means of compliance with the requirements of this AD may be approved by the Chief, Chicago Aircraft Certification Office, Federal Aviation Administration, Central Region. The manufacturer's specifications and procedures identified and described in this directive are available upon request to Detroit Diesel Allison, Division of General Motors Corporation, Indianapolis, Indiana 46206. These documents may also be examined at the New England Regional Office, 12 New England Executive Park, Burlington, Massachusetts 01803. A historical file on this AD is maintained by the FAA at the New England Regional Office. This amendment becomes effective July 1, 1982.