TM 1-1520-240-MTF
2-58
ENGINE RUN UP (CONT.)
e. Check all XMSN OIL TEMP readings.
f. XMSN OIL TEMP — SCAN. Reading
$5_of high temperature xmsn.
g. XMSN OIL TEMP — TEST. Check to –70_C
or below.
B* 8. Flight instruments — Check as follows:
a. Horizontal Situation Indicator (HSI) —
Check synchronized. Cross-check with
magnetic compass.
b. Attitude indicators — Adjust as required.
B 9. 712 EMERG ENG TRIM System — Check
operation (as required).
a. Note N1 reading.
b. NO.1 EMERG ENG TRIM AUTO/MAN
switch — MAN.
CAUTION
When EMER ENG TRIM switch is held in the
DEC position it is possible that N1 speed may
go below the minimum allowable of 60 % and
the engine fail. Monitor N1 speed closely if
engine N1 speed goes below 60% and fails
immediately place associated ECL to STOP
and be prepared to motor the engine if high
PTIT is noted.
c. NO. 1 EMERG ENG TRIM INC/DECR
switch — Full DECR. Engine speed should
decrease and stabilize at 60% N1 or above.
Ensure engine remains running.
d. NO. 1 EMERG ENG TRIM INC/DECR
switch — INC to previously noted N1 speed.
e. No. 1 ENG TRIM AUTO/MAN switch —
AUTO.
