AD 77-12-07

77-12-07 BOEING: Amendment 39-2924. Applies to Model 747 airplanes certificated in all categories and equipped with fuel valve actuator assemblies, Boeing P/N 60B92406-27 (ITT General Controls P/N MA11A1173, serial numbers H78442 through H98252 and J00047 through J34689) or Boeing P/N 60B92406-28 (ITT General Controls P/N MA11A1174, serial numbers H95059 through H95074 and J04218 through J37314) installed or manufactured between April 30, 1975, and April 1, 1977. Compliance required as indicated. To prevent loss of control of fuel shutoff, crossfeed and required fuel management capability, accomplish the following: A. Within 145 days or 1300 hours time in service after the effective date of this Airworthiness Directive whichever occurs first, remove fuel valve actuator assembly, Boeing P/N 60B92406-27 (ITT General Controls P/N MA11A1173) or Boeing P/N 60B92406-28 (ITT General Controls P/N MA11A1174) from the No. 1, 2, 3 and 4 engine fuel shutoff valves, AND (1) replace with actuator assembly Boeing P/N 60B92406-32 (ITT General Controls P/N MA11A1173-1) or Boeing P/N 60B92406-33 (ITT General Controls P/N MA11A1174-1): OR (2) replace with an actuator assembly which has been inspected and reworked to incorporate a properly heat treated armature shaft in accordance with ITT General Controls Service Bulletins MA11A1173-24-01 or MA11A1174-24-01, both dated March 30, 1977, and 107728A101-24-01, dated June 10, 1977, or an equivalent method approved by the Chief, Engineering and Manufacturing Branch, FAA Northwest Region. B. Within 1 year or 3200 hours time in service after the effective date of this Airworthiness Directive whichever occurs first, replace or rework the actuator assemblies Boeing P/N 60B92406-27 (ITT General Controls P/N MA11A1173) or Boeing P/N 60B92406-28 (ITT General Controls P/N MA11A1174) which are installed on the No. 1, 2, 3 and 4 crossfeed valves, the No. 1 and 4 reserve tank gravity transfer valves, the center wing tank fuel jettison valves and, if installed, the No. 2 and 3 reserve tank gravity transfer valves in accordance with A.(1) or A.(2) above. The manufacturer's specifications and procedures identified and described in this directive are incorporated herein and made a part hereof pursuant to U.S.C. 552(a)(1). All persons affected by this directive who have not already received these documents from the manufacturer, may obtain copies upon request to ITT General Controls, Aerospace Products, 1200 South Flower Street, Burbank, California 91502. These documents may also be examined at the Engineering and Manufacturing Branch, FAA Northwest Region, 9010 East Marginal Way South, Seattle, Washington 98108.

This amendment becomes effective June 20, 1977.