Change 3 8-21
c. AUTOFEATHER switch Hold to TEST
(both AUTOFEATHER annunciators illu-
d. POWER levers Retard individually.
(1) At 13% to 19% torque Opposite
AUTOFEATHER annunciator extin-
guished, IGN ON annunciator illumi-
(2) At 7% to 13% torque Both AUTO-
FEATHER annunciators extinguished
(propeller starts to feather).
The POWER lever may have to be lifted and
pulled towards the ground fine gate in order to
attain the 7% to 13% torque.
AUTOFEATHER annunciators will illuminate
and extinguish with each fluctuation of torque as
the propeller feathers.
(3) Return POWER lever to approximate-
ly 25% torque.
e. Repeat above procedure with other en-
f. AUTOFEATHER switch ARM.
g. AUTO IGNITION switches OFF.
4. Overspeed governors and rudder boost
Check as follows:
f. Yaw damper ENGAGE. Observe YD
ENG annunciator illuminated.
g. PROP GOVERNOR TEST switch Hold
to PROP GOVERNOR TEST position.
h. Left POWER lever Increase until pro-
peller stabilizes at 1540 to 1580 RPM.
i. Release PROP GOVERNOR TEST
switch Observe that propeller RPM in-
j. Continue advancing left POWER lever
At approximately 50% torque differential,
YD ENG annunciator should extinguish,
and left rudder pedal should start to move
forward. Increasing engine power should
result in increased rudder pedal travel.
(Observe torque and TGT limits.)
k. Slowly retard left POWER lever Rudder
pedal travel should decrease with de-
creasing power. At approximately 50%
torque differential, YD ENG annunciator
may flicker as rudder boost system disen-
l. Re-engage yaw damper, and repeat steps
g through k with other engine.
5. Primary governors Check as follows:
a. POWER levers Set as 1500 RPM.
b. Exercise propeller Move to feather det-
ent, check propeller RPM 1150 +/-50, then
return to HIGH RPM.
8. Engine anti-ice Check as follows:
a. ENGINE INLET HEAT SWITCHES (2)
ON. Check #1 and #2 LIP HEAT amber
caution advisory annunciator lights illumi-
nated. After lip heats warm check that the
amber caution advisory lights extinguish
and the #1 and #2 LIP HEAT ON green
advisory annunciators illuminate.
b. ENGINE INLET HEAT SWITCHES (2)
OFF. Check that the #1 and #2 LIP HEAT
ON green advisory annunciators extin-
guish and the #1 and #2 LIP HEAT amber
caution advisory lights illuminate. After the
lip heat cools check that the amber adviso-
ry LIP HEAT LIGHTS have extinguished.
9. Anti-ice and deice systems Check as fol-
a. WINDSHIELD anti-ice switches (2)
NORMAL then HIGH. Check PILOT and
COPILOT (individually) for loadmeter rise,