TM55-2840-251-23
Section X ENGINE TESTING (Continued)
1-94
GROUND TEST OF ENGINE
INSTALLED IN AIRCRAFT
(Cont)
8.c.(1) (Cont)
(g)
With propeller control lever in
INCREASE position, advance power control lever and
observe for governing action at 94% ( ±
1%) propeller shaft
speed (Np). The governing point is reached when further
movement of power control lever produces no increase in
propeller shaft speed. Adjust power turbine governor
minimum governing speed adjustment screw (7) to obtain
desired limits.
NOTE
Adjust in extremely fine increments only.
(h)
Move power turbine governor control
arm (5) clock- wise to maximum governing speed stop and
secure in this position.
NOTE
If power turbine governor has been replaced, a
reverse thrust performance check (subparagraph
6) must be carried out in addition to power turbine
governor check.
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