ENGINE RUNUP (CONT)
Both power levers Advance to 88-
92% N1 (observe ITT and torque
limits). Check both AUTOFEATHER
lights illuminated. Retard each power
lever individually below 88-92% N1.
Check both AUTOFEATHE R
*13. Overspeed governor - Check by
setting RPM to 2100. Hold PROP GOV
DECREASE TO 1980 - 2060. Release
test switches. RPM should return to
*14. Engine ice vanes (Pull to EXT) - Check
operation by observing drop in torque
extended when released, then push to
*15. Primary governor - Check. Set 1900
RPM with power levers. Retard propeller
levers to detent position. Check for 1725
- 1775 RPM then advance propeller lever
to HIGH RPM.
*16. Propeller low pitch blade angle -
Check on one engine at a time as follows:
Read the corrected propeller torque in
ft-lb at 2000 RPM from Propeller
Torque Chart (figure 1).