TM55-2840-251-23
Section X ENGINE TESTING (Continued)
1-94
GROUND TEST OF ENGINE
INSTALLED IN AIRCRAFT
(Cont)
4.c.(2) (Cont)
(i) Check that torquemeter pressure is
within 0 to + 31 ft. lb. of value obtained from curve and
adjust gas generator maximum speed stop (3). (Refer to
Part Power Trim Curve Chart.)
(j) Perform engine shutdown check
(subparagraph 7).
CAUTION
Part power trim stop must be properly stowed
after completion of part power trim checks.
Insure that attaching screw is tightened and
lockwired.
(k)
Loosen screw
(1)
place part power trim stop
(2)
in stowed position, tighten screw
and secure with Lockwire (E.5).
(1)
Lockwire
(E.5)
gas
generator
maximum speed stop locknut (4).
d.
Data Plate Speed. Data plate speed is gas
generator speed (Ng) obtained with engine running at
reference power on a standard day (59F) (15C). This
value is determined from acceptance running, and each
engine has its individual value stamped on data plate
speed plate in rpm and a percentage of maximum gas
generator speed. The reference power in shp /dq (Shp
corrected) is also stamped on the data plate.
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