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MIL-D-23222A(AS)
3.3.5.2.5.1
(Cont)
manufacturer to the NAVAIR for acceptance at least two months prior
to performing the tests. Instrumentation necessary for these tests
will be furnished by the Government, if available; otherwise the
necessary instrumentation shall be furnished by the aircraft con-
tractor. The results of the tests shall be submitted by the aircraft
contractor via the power plant manufacturer to the NAVAIR, in the
Power Plant Vibration Survey Report. The foregoing requirements
apply both to contractor furnished power plants and to government
furnished power plants. If the results of the survey as determined
by NAVAIR indicate unsatisfactory vibration characteristics of the
power plant installation, the Government will place the responsibility
for correction in each specific case. The aircraft contractor shall
repeat the survey as may be necessary to demonstrate correction of
the unsatisfactory characteristics.
3.3.5.2.5.2
POWER PLANT INSTALLATION TEMPERATURE SURVEY. - The
helicopter contractor shall perform flight and
ground tests specified in Spec MIL-C-8678 to demonstrate that the
power plant installation will meet the requirements of Spec MIL-C-
8678 and spec MIL-T-8679. The results of these tests shall be sub-
mitted to NAVAIR for provisional acceptance pending completion of
INSURV Acceptance Trials upon which final approval will be based.
Instrumentation necessary for these tests will be furnished by the
Government, if available, and shall be listed as part of the Demonstra-
tion Intrumentation Report required by paragraph 3.19.2.1.
3.3.5.2.5.3
COMPRESSOR INLET TURBINE OUTLET SURVEY. On
turbine engine. installations, a static and total
pressure survey shall be made at the compressor inlet. A total pressure
survey shall also be made at the turbine outlets. These surveys
shall be made for the takeoff, power-approach, rearward flight, maxi-
mum yaw to right and to left, hover in ground effect, hover out of
ground effect, and level flight conditions for helicopter speeds from
hover to Vmax. Air flow shall also be determined for the foregoing
conditions. Instrumentation for these surveys shall be in accordance
with the recommendation of the engine manufacturer as approved or
modified by NAVAIR.
3.35.2.6
LIMIT FLIGHT TIME FOR NPE HELICOPTERS. - The total
number of flight hours accumulated on any one
helicopter flown by NaVY pilots in an NPE evaluation shall not exceed
one-half of the total number of flight hours accumulated on any one
helicopter of the model used in the contractor's develomental flight
tests, unless otherwise approved in writing by NAVAIR.
26

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