Beechcraft C-12C Operator And Technical Reference Manual page 873

(2) 85% maximum – HIGH IDLE.
(3) 85% maximum – Ground Operations.
9. CONDITION levers – As required.
10. Red anticollision light – Reset.
To reset, turn off approximately 5 seconds,
then to the NIGHT (red) position.
voltage drops below approximately 20
volts, the anticollision light may become
inoperative. Normally, NIGHT (red) strobe
is used for ground operations and DAY
(white) is used for flight operations.
8A-28. BEFORE TAXIING.
1. AC/DC power – Check.
*
2. AVIONICS MASTER POWER – ON.
*
3. EFIS POWER – ON.
*
* 4. CABIN AIR/TEMP MODE and CABIN
AIR/TEMP switches – Set as desired.
* 5. BLEED AIR VALVES – As required.
CAUTION
Do not leave brake deice on longer than
required to check function of annunciators
when ambient temperatures are above
15 °C.
Brake deice control valves may become
inoperative if valves
periodically. One cycle of the valves is
required daily, regardless of the weather
conditions.
6. BRAKE DEICE switch – As required.
*
7. Avionics – Check and set as required.
* 8. TCAS – TEST and set.
9. FLAPS – Check.
10. . Altimeters – Set and Check.
NOTE
When
NOTE
are not cycled
8A-29. TAXIING.
*
CAUTION
Never taxi with a flat tire or a flat shock
strut. During taxi operations, particular
attention should be given to propeller tip
clearance. Extreme caution is required
when operating on unimproved or irregular
surfaces or when high winds exist.
operations produce a propeller RPM over
1600, retard propeller levers to the detent
to limit RPM to 1600 to help reduce the
possibility of ingestion of ground debris.
1. Brakes – Check.
2. Flight instruments – Check.
8A-30. ENGINE RUNUP.
1. Parking brake – As required.
2. Propeller feathering – Check.
3. AUTOFEATHER/AUTO IGN – Check as
required.
a. AUTO IGN switches – ARM. IGN ON
annunciators illuminated.
b. POWER levers – 22% torque. IGN ON
annunciators extinguish.
c. AUTOFEATHER switch – Hold to TEST.
Both AUTOFEATHER
illuminated.
d. POWER levers – Retard individually.
(1) Approximately 16% – 21% torque,
opposite
annunciator extinguishes, IGN ON
annunciator illuminated.
(2) Approximately 9% – 14% torque,
both AUTOFEATHER annunciators
extinguished (prop begins to feather).
IGN ON annunciator illuminated.
AUTOFEATHER
illuminate and
fluctuation of torque as the propeller
attempts to feather.
(3) Return POWER lever to 22% torque.
e. Repeat procedure with other engine.
f. POWER
AUTOFEATHER
props do not feather).
TM 1-1510-218-10
annunciators
AUTOFEATHER
NOTE
annunciators will
extinguish with each
levers – IDLE
lights extinguished,
If
(Both
8A-13