TM55-2840-251-23
Section X ENGINE TESTING (Continued )
1-94
GROUND TEST OF ENGINE
INSTALLED IN AIRCRAFT
(Cont)
9.c. (Cont)
(7)
If Ng, with Py sense tube disconnected,
was the same as Ng recorded in subparagraph c.(4), then
the engine was running on the minimum fuel flow stop and
the idle speed must be checked as in subpara- graph d.
d.
Barometric Pressure Below 26.25 in. Hg. At
barometric pressure below 26.25 in. Hg., check idle speed
adjustment as follows:
CAUTION
The idle speed must not be adjusted at
barometric pressures below 28.58 in. Hg.
(1)
Perform pre-start check (subparagraph
2).
(2)
Accomplish satisfactory engine start
(subpara- graph 3).
(3)
Allow engine to warm up to operating
temperature and allow instruments to stabilize. Record Ng
at idle.
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