TM 1-1520-240-MTF
2-36
STARTING ENGINES (CONT.)
NOTE
Allow one minute for cooling between APU
shutdown and restart. Failure to do so may result
in a premature shutdown on restart due to
overtemperature.
B* 13. APU START — Check as follows:
a. APU ON caution/advisory light illuminated.
b. UTIL HYD SYS caution — Check out. If the
light does not go out within 30 seconds of
operation, shut down the APU. Have the
utility system checked.
B* 14. APU GEN switch — ON. Check as follows:
a. NO. 1 and NO. 2 REC OFF caution out.
b. Avionics cooling fan on.
c. VGI alignment within 90 seconds.
15. GPU — Disconnect if used. Check EXT PWR
light out.
B* 16. POWER XFR No. 1 and No. 2 switches — ON.
Check HYD FLT CONT caution lights out within
30 seconds. If not out within 30 seconds
POWER XFR No. 1 and No. 2 switches off, do
not fly the aircraft.
BF* 17. Maintenance panel — Check as follows:
F a. #1 and #2 HYD FLT Control pressures
within 2500 - 3200 PSI, $ 50 PSI maximum
fluctuation.
F b. Utility hydraulic pressure within 2500 - 3500
PSI, $50 PSI maximum fluctuation.
