2-16. UNUSUAL ENVIRONMENT/WEATHER CONDITIONS-Continued.
Turn MASTER switch on and FUEL PUMP switch to OFF.
Set hydraulic SYSTEM SELECTOR control lever on MAIN and hydraulic POWER control lever on OFF (see
Ensure APU generator switch (1) is OFF.
To start APU:
PREHEAT switch (2) is held ON until engine starts.
Turn FUEL SHUTOFF switch (3) to ON.
Turn PREHEAT switch (2) to ON for 120 seconds.
Turn START button (4) to ON until engine runs or for 60 seconds. If engine does not start, continue
with step d.
Turn PREHEAT switch (2) to ON for 60 seconds.
Turn START button (4) to ON until engine runs (no longer than 30 seconds).