GRUMMAN AMERICAN
FOR TRAINING USE ONLY – SECTION 3
MODEL GA-7/COUGAR
EMERGENCY PROCEDURES
3-14
Issued: April 10, 1978
CARBURETOR ICING
1)
Carburetor Heat Control – Full ON.
2)
Mixture Control – Lean as necessary for smooth engine operation.
3)
Carburetor Heat Control – OFF, when icing is no longer encountered.
4)
Mixture Control – Adjust as necessary for smooth engine operation.
NOTE
Full carburetor heat will not damage the engine, and is recommended to ensure
rapid and complete elimination of carburetor ice. When ice is removed, return
the carburetor heat control to the OFF position. Partial carburetor heat may be
worse than no heat at all, since it may only partially melt the ice, allowing it to
refreeze further down in the intake system.
STATIC SOURCE BLOCKAGE
ERRONEOUS INSTRUMENT READING SUSPECTED
NOTE
The altitude hold function of any installed auto pilot should be momentarily
turned off to avoid abrupt changes in pitch attitude.
1)
Alternate Static Source Valve – PULL ON.
WARNING
WHEN USING THE ALTERNATE STATIC AIR SOURCE, THE FOLLOWING
CORRECTIONS APPLY:
DV WINDOW CLOSED: IN CRUISE FLIGHT SUBTRACT 10 KIAS FROM INDICATED
AIRSPEED AND 130 FEET FROM INDICATED ALTITUDE. NO CORRECTION FOR
CLIMBS OR FLIGHT WITH GEAR EXTENDED.
DV WINDOW OPEN: IN CRUISE FLIGHT SUBTRACT 15 KIAS FROM INDICATED
AIRSPEED AND 210 FEET FROM INDICATED ALTITUDE. SUBTRACT 10 KIAS AND
100 FEET FOR CLIMBS AND FLIGHT WITH GEAR EXTENDED.
