MIL-DTL-62483A(AT)
4.2.3.9.4 Engine governor. During the manufacturer's break-in run, it shall be verified
that the engine governor is set and sealed to govern the engine speed. The governor shall be
sealed in such a manner that any tampering with the setting will be readily observed.
4.2.3.9.5 Power steering pump. Verify that the manufacturer has a certificate on file
attesting that the power steering pump conforms to performance requirements specified in
Drawing 11664481 (see 3.3.10.5).
4.2.3.9.6 Electromagnetic compatibility. The engine and components shall be tested to
verify that the conducted and radiated emissions do not exceed the levels shown in figures 2
and 3.
4.2.4 Interface requirements verification.
4.2.4.1 Overall envelope and interface inspection. Verify that the engine envelope
dimensions and the mounting, electrical, and mechanical interface dimensions conform to the
applicable drawing.
4.2.4.2 Engine weight with accessories. The engine complete with accessories shall be
weighed on a certified scale and shall not weigh more than 2625 lbs (1191 kg).
4.2.5 Support and ownership requirements.
4.2.5.1 Reliability. To determine reliability, the engine and its components shall be
inspected for failures following the reliability test. There shall be no failures which require engine
replacement. Identical failures of the engine, engine components, or engine accessories which
occur twice during the 20 000 mile (32 186 km) test whether on one engine or on another engine
in a different vehicle which is being concurrently tested shall be considered a failure and the
Government shall refuse acceptance of the engines. Successful completion of complete retesting
must be accomplished prior to approval by the Government.
4.2.5.1.1 Maintenance ratio. To determine maintenance ratio, the data accumulated
during vehicle test cycles shall be evaluated. Maintenance data so accumulated will be based on
active maintenance time; i.e., time for diagnosis, repair, and test of repair, but will not include
time for recovering the vehicle, cleaning, securing parts, performing administrative shop functions,
obtaining mechanics, etc. Maintenance time in excess of that allowed shall constitute failure to
achieve the maintenance ratio.
4.2.5.1.2 Maintainability. The engine and its installation shall be evaluated for
maintainability. The engine mounted accessories shall be removed, reinstalled, and tested to
determine that the time conforms to the one hour maximum specified.
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