a. EFIS POWER switches OFF.
b. AP/TRIM POWER switch OFF.
c. CABIN PRESS switch PRESS.
d. RUDDER BOOST switch On.
e. Pressurization controller Set.
9. Copilot's instrument panel Set.
Compass control SLV.
10. Copilot's clock Check and set.
11. Copilot's subpanel Check.
a. CABIN signs As required.
b. VENT BLOWER switch As required.
c. AFT BLOWER OFF.
d. BLEED AIR VALVES switches ENVIR
e. CABIN TEMP MODE control OFF.
f. CABIN/COCKPIT AIR control OFF.
g. COPILOT AIR control As required.
h. MIC selector switch NORMAL.
i. Oxygen pressure Check.
12. Copilot's circuit breaker panel Check.
13. Static air source Normal.
14. BATT ON (23 volts minimum for battery
15. Overhead panel lights As required.
16. Exterior lights As required.
Never connect an external power source to
the aircraft unless a battery indicating a
charge of at least 20 volts is in the aircraft
and in the ON position. If the battery
voltage is less than 20 volts, the battery
must be recharged, or replaced with a
battery indicating at least 20 volts before
connecting external power. Use only an
external power source fitted with an AN-
17. GPU As required.
18. External power advisory light As required.
19. DC volt/loadmeters Check loads, voltage,
and current limiters.
When an external power source is used, it
must be set as follows:
28.0 to 28.4 volts
1000 amps capacity
300 amps maximum continuous
If the battery is partially discharged, the
BATTERY CHG annunciator will illuminate
approximately 6 seconds after external
power is on line. If the annunciator does
not extinguish within 5 minutes, refer to
the Battery Chg Annunciator Illuminated
procedure in Chapter 9.
The battery should be on to absorb transients
present in some auxiliary power units. An EXT PWR
annunciator alerts the crew when an external power
plug is connected to the aircraft.
8-22. FIRST ENGINE START (BATTERY START).
After turning on the BATT SWITCH, wait a
full 10 seconds before starting the engines
to allow the ETM to complete its setup
Starting procedures are identical for both
engines except the second engine generator is kept off
line after the second engine start to allow performing
the current limiters check. When making a battery
start, the right engine should be started first. A
crewmember should monitor the outside observer
throughout the engine start.
1. Propeller area Clear.
2. Engine Start.
a. IGNITION AND ENGINE START switch
ON. IGN ON annunciator should
illuminate and associated FUEL PRESS
annunciator should extinguish.