MIL-PRF-62439 Fuel Control, Main ElectrohydraulicThis specification covers an electrohydraulic main fuel control used in the gas turbine engine of the M1 tank, referred to herein as "assembly." The assembly is an electrohydraulic device which converts electrical commands to fuel flow and power turbine stator \(PTS\) inlet guide vane \(IGV\) actuator flows and pressures. This assembly also contains the PTS and IGV electrical feedback components.

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MIL-PRF-62439B(AT)

ASSOCIATION CONNECTING ELECTRONICS INDUSTRIES (IPC)

IPC-TM650.2.6.1

Fungus Resistant Printed Wiring Materials

(Applications for copies may be obtained from Association Connecting Electronics Industries,

3000 Lakeside Drive, 309 S, Bannockburn, IL 60015 or https://www.ipc.org/.)

2.4 Order of precedence. Unless otherwise noted herein or in the contract, in the event

of a conflict between the text of this document and the references cited herein, the text of this

document takes precedence. Nothing in this document, however, supersedes applicable laws and

regulations unless a specific exemption has been obtained.

3. REQUIREMENTS

3.1 First article. When specified (see 6.2), a sample shall be subjected to first article

inspection in accordance with 4.3.

3.2 Materials. Materials shall be as specified herein and in referenced specifications and

standards (see 4.5.1).

3.2.1 Recycled, recovered, or environmentally preferable materials. Recycled,

recovered, or environmentally preferable materials should be used to the maximum extent

possible, provided that the material meets or exceeds the operational and maintenance

requirements, and promotes economically advantageous life cycle costs (see 4.5.1).

3.2.2 Surface treatment. Unless otherwise specified (see 6.2), surfaces other than

mounting surfaces shall be treated in accordance with the manufacturer's commercial practices

and shall meet the requirements specified herein (see 4.5.1).

3.3 Design and construction. The assembly shall be designed and constructed as

specified herein, and in accordance with Drawing 12324614 and its applicable standards and

specifications (see 4.5.2).

3.3.1 Nuclear hardening. The fuel control assembly shall be designed to withstand the

nuclear threat environments as defined in General Dynamics Engineering classified

(confidential) document entitled "Nuclear Hardening Criteria (U)", document control number

LS199500011841 (see 4.5.1 and 4.5.2).

3.3.2 Interchangeability. The assembly shall be interchangeable on existing equipment

without modification or adjustments (see 4.5.2).

3.3.3 Weight. The weight of the assembly shall be no greater than 35 pounds (lb)

(see 4.5.2).