GRUMMAN AMERICAN
FOR TRAINING USE ONLY – SECTION 3
MODEL GA-7/COUGAR
EMERGENCY PROCEDURES
3-29
Issued: April 10, 1978
FIRE ON GROUND (TAXI AND TAKEOFF WITH SUFFICIENT DISTANCE REMAINING TO STOP)
Close both throttles and apply brakes as required to bring the airplane to a stop. Set both mixture controls to idle
cutoff. Turn the Master, Alternator, and Magneto Switches OFF. Take the fire extinguisher from the mounting and
evacuate the airplane. Take appropriate measures to extinguish the fire.
WING OR ENGINE FIRE IN FLIGHT
Shut off the affected wing or engine fuel selector and boost pump. Secure the affected engine. (See SECURING
INOPERATIVE ENGINE Checklist.) Turn the Navigation and Strobe Lights OFF. Set the power and cowl flaps of the
operating engine as required. Move the cabin heat control of the affected engine to the COOL position. Reduce
the electrical load as required and land as soon as practical.
NOTE
Refer to ONE ENGINE INOPERATIVE OPERATION procedures for additional
information.
INADVERTENT ICING ENCOUNTER
AIRFRAME ICING
If icing is encountered, turn pitot heat on. Set both cabin heat controls for maximum temperature. Make sure the
defroster vents on top of the instrument panel are fully open to minimize ice buildup on the windshield. Heated
air flow to the windshield can be increased by closing the heat vents at the floor and aft of the center console.
Increase engine RPM to minimize ice buildup on the propellers.
Ice buildup on the wings can be monitored visually. Propeller icing is evidenced by excessive vibration. To clear
the propellers, momentarily reduce the engine speed to 2000 RPM by pulling the propeller control aft, then rapidly
move the control full forward. Repeating this procedure several times should shed ice and result in a smoother
running engine.
If further icing cannot be avoided, plan a landing at the nearest suitable airport.
Ice accumulation of ¼ inch or mover on the wing leading edges disrupt air flow over the wing, reducing lift. Be
prepared for a higher power requirement. The approach speed should be faster due to increased stall speed. A
longer landing roll will be required due to the increased approach speed and possible icing on the ground.
The approach should be planned well ahead. While at sufficient altitude to permit stall recovery, try the planned
approach configuration and decelerate to approach speed. Because of severely reduced climb capability and
continued ice accumulation, missed approaches should be avoided if at all possible. In a mandatory situation,
make the decision much earlier in the approach. Set wing flaps to 10° for ice accumulations of one inch or less.
With heavier accumulations, approach with flaps retracted to ensure adequate elevator effectiveness in the
approach and landing.
Approach with a higher than normal airspeed, depending on the amount of ice accumulation. If ice accumulation
is unusually large, obtain the planned approach speed while in the approach configuration at an altitude high
enough to permit recovery in the event of an inadvertent stall.
If required, open the pilot’s window and, if possible, scrape ice from a portion of the windshield for visibility in the
landing approach.