Beechcraft C-12C Operator And Technical Reference Manual page 836

TM 1-1510-218-10
b. ANNUNCIATOR TEST switch – Press
and hold. Check that all lights in both
annunciator panels, FIRE PULL handle
lights, marker beacon lights, MASTER
CAUTION, and MASTER WARNING
lights are illuminated.
and check that all lights except those in
step a are extinguished.
c. MASTER
WARNING lights – Press and release.
Both lights should extinguish.
19. Stall and gear warning system – Check as
follows:
a. STALL WARN TEST switch – TEST.
Check that warning horn sounds.
b. LDG GEAR WARN TEST switch –
TEST. Check that warning horn sounds
and that the two LDG GEAR CONTR
handle warning lights illuminate.
20. Engine fire protection system – Check as
follows:
a. FIRE PROTECTION TEST switch –
Rotate switch counterclockwise to check
three DETR positions.
handles
position. MASTER WARNING must be
reset in each position.
b. FIRE DETECTOR TEST switch – Rotate
switch counterclockwise to check two
EXTGH positions.
associated EXTGH DISCH caution light,
and MASTER CAUTION light should
illuminate in each position.
* 8-22. FIRST ENGINE START (BATTERY START).
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.
start, the right engine should be started first. When
making a Ground Power Unit (GPU) start, the left
engine should be started first due to the GPU
receptacle being located adjacent to the right engine.
Normally, only one engine is started utilizing the GPU,
reverting to the Battery Start procedure for the second
engine start. A crewmember should monitor the
outside observer throughout the engine start.
1. EXTERIOR
required.
2. Propeller – Clear.
3. Engine – Start.
8-10
Release switch
CAUTION and MASTER
FIRE PULL
should illuminate in
SQUIB OK light,
When making a battery
LIGHTS switches
a. IGNITION AND ENGINE STARTER
If the ignition does not occur within
10 seconds after moving condition lever to
LOW IDLE,
procedure.
attempt is discontinued, the entire starting
sequence must be repeated after allowing
the engine to come to a complete stop
(1-minute minimum).
b. CONDITION
Monitor TGT to avoid a hot start. If there is
a rapid rise in TGT, be prepared to abort
the start before limits are exceeded.
During starting, the maximum allowable
TGT is 1000 °C for 5 seconds. If this limit is
exceeded, use Abort Start procedure,
Paragraph 8-24, and discontinue start.
each
Enter the peak temperature and duration
on DA Form 2408-13-1.
c. TGT and N
d. Oil pressure – Check (60 psi minimum).
e. IGNITION AND ENGINE STARTER
4. Engine and systems instruments – Check.
5. CONDITION lever – HIGH IDLE. Monitor
TGT as the condition lever is advanced.
Ensure N
RPM before turning on generator.
6. GEN switch – After N
RESET, then ON.
* 8-23. SECOND
START).
1. First engine generator load 50% or less –
– As
GEN switch OFF.
2. Propeller – Clear.
3. Engine – Start.
switch – ON. IGN ON light should
illuminate and associated FUEL PRESS
light should extinguish.
CAUTION
initiate Engine
If for any reason a starting
lever (after
stabilizes, 12% for 5 seconds minimum)
– LOW IDLE.
CAUTION
– Monitor (TGT 1000 qC
1
maximum N 52% minimum).
1
switch – OFF after 50% N
decreasing.
CAUTION
has reached at least HIGH IDLE
1
reaches high idle,
1
ENGINE START
Clearing
N RPM
1
and TGT
1
(BATTERY