TM  55-1510-221-10 e.  Left  POWER  lever  -  Approximately  22% torque. f.   Repeat steps b and d for right engine. g.  POWER  levers  -  IDLE  (both  lights  out, neither  propeller  feathers). *4.   Overspeed governors - Check as follows: a. b. c. d. e. POWER  levers  -  Set  approximately  1950 RPM (both engines). #1 propeller governor test switch - Hold to TEST  position. #1 propeller RPM 1830 to 1910 - Check. Repeat steps b and c for # 2 engine. POWER levers - Set 1800 RPM. *5.   Primary governors - Check as follows: a.   POWER levers - Set 1800 RPM. b. Propeller levers - Move aft to detent. Check that propeller RPM drops to RPM. c.   Propeller levers - HIGH RPM. *6.   Ice vanes - Check as follows: a. Ice vane switches - EXTEND. 1600 to 1640 Verify  torque drop, TGT increase, and illumination of #1 ICE  VANE  EXTEND  and  #2  ICE  VANE EXT annunciators. b.  Ice  vane  switches  -  RETRACT.  Verify  return to original torque and TGT, and that #1 ICE VANE  EXTEND  and  #2  ICE  VANE  EXT annunciators extinguish. 7.  CONDITION  levers  -  HI  IDLE. 8. POWER levers - IDLE. *9.   Anti-ice and deice systems - Check as follows: a.   Windshield anti-ice switches - NORMAL and HI. Check   PILOT   and   COPILOT (individually)  for  loadmeter  rise,  then  OFF. b.  Propeller  switches  -  INNER  and  OUTER (momentarily). Check for loadmeter rise. 8-16 Change  4 c. d. e. f. g. h. Surface  deice  switch  -  SINGLE  CYCLE AUTO.  Check  for  a  drop  in  pneumatic pressure and wing deice boot inflation and after  6  seconds  for  a  second  drop  in pneumatic  pressure. Surface deice switch - MANUAL. Check that surface boots inflate, and remain inflated, then OFF. Antenna deice switch - SINGLE. Check for a drop  in  pneumatic  pressure  and  antenna deice  boot  inflation. Antenna deice switch - MANUAL. Check that boots inflate, and remain inflated, then OFF. Engine inlet lip heat switches - ON. Check that #1 LIP HEAT ON and #2 LIP HEAT ON advisory annunciator lights are illuminated, and the #1 LIP HEAT and #2 LIP HEAT caution  annunciator  lights  are  extinguished, then OFF. RADOME  ANTI-ICE  switch  -  ON.  Check that   RADOME   HEAT   annunciator    is illuminated,  then  OFF. *10.   Pneumatic pressure - Check as follows: a.  Left  bleed  air  valve  switch  -  PNEU  & ENVIRO  OFF. b.   Pneumatic pressure - Check 12 to 20 PSI. c.   Right pneumatic and environmental switch - PNEU & ENVIRO OFF. Check that L BL AIR FAIL and R BLAIR FAIL, and L BL AIR OFF and R BL AIR OFF annunciator lights are  illuminated. d. Pneumatic pressure - Verify zero.