AD 85-04-02

85-04-02 BOEING: Amendment 39-5007. Applies to the Model 767-200 series airplanes certificated in all categories. Compliance is required as indicated unless previously accomplished. To prevent fuel boost pump seizures in flight, as a result of operation with cold fuel, accomplish the following:

A. Within 30 days after the effective date of this AD, install a cockpit placard which limits fuel tank temperature to -37 degrees C (-35 degrees F), in accordance with Boeing Service Bulletin 767-28-14 dated June 20, 1984, or later FAA approved revision.

B. Within one year after the effective date of this AD, replace at least one fuel boost pump in each main fuel tank and at least one fuel boost pump in each center auxiliary fuel tank (if activated) with an improved boost pump, in accordance with Boeing Service Bulletin 767-28-14 dated June 20, 1984, or later FAA approved revision.

C. Within two years after the effective date of this AD, replace all unimproved fuel boost pumps in each main tank and all unimproved fuel boost pumps in each center auxiliary tank (if activated) with improved fuel boost pumps, in accordance with Boeing Service Bulletin 767- 28-14 dated June 20, 1984, or later FAA approved revision.

D. The fuel temperature limitation and cockpit placard required by paragraph A., above, may be removed after at least one improved fuel boost pump is installed in each tank location required by paragraph B., above.

NOTE: The center auxiliary fuel tank boost pumps need not be replaced on airplanes with deactivated center auxiliary fuel tanks (i.e., those not able to be fueled); however, this deviation must be recorded in the permanent aircraft records. All center auxiliary fuel tank boost pumps must be replaced with the improved boost pumps identified in Boeing Service Bulletin 767-28-14 prior to activation of the center auxiliary fuel tank.

E. Alternate means of compliance which provide an equivalent level of safety may be used whenapproved by the Manager, Seattle Aircraft Certification Office, FAA, Northwest Mountain Region.

F. Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate airplanes to a base for the accomplishment of inspections and/or modifications required by this AD.

This amendment becomes effective March 28, 1985.