GRUMMAN AMERICAN
FOR TRAINING USE ONLY – SECTION 9
MODEL GA-7/COUGAR
SUPPLEMENTS
9-9
Issued: April 10, 1978
2.
When the top bar is pressed and the rocker is moved forward, nose down trim will occur – when moved aft,
nose up trim will occur.
PREFLIGHT COMMAND TRIM – BEFORE EACH FLIGHT
1.
Trim master switch – ON (switch circuit breaker).
2.
Autopilot OFF – Check normal trim operation – UP. Grasp trim control and check override capability. Check
nose down operation. Recheck override.
3.
With trim operating – depress master trim interrupt switch – trim should stop – release interrupt switch – trim
operation should resume.
4.
Activate center bar only – push rocker fore and aft – only. Trim should not operate with either separate
action.
AUTOTRIM – BEFORE EACH FLIGHT
1.
Autopilot ON – (Roll and Pitch Sections) – Check automatic operation by activating autopilot pitch command
disc UP then DN. Observe trim operation follows pitch command direction.
NOTE
In autopilot mode, there will be approximately a 3 second delay between
operation of pitch command and operation of trim.
2.
Press center bar (autopilot OFF) – release – check autopilot disengagement.
3.
Rotate trim control to check manual trim operation.
4.
Recheck airplane pitch trim to correct takeoff position after autopilot and trim system check.
SPECIAL OPERATIONS AND INFORMATION
1.
Initial and/or intermediate approach segment should be conducted at approximately 90 to 100 KIAS with the
flaps extended up to 20° and the gear down. Upon intercepting the glide path or when passing the final
approach fix (FAF) immediately reduce the power as necessary to hold 80 to 90 KIAS on the final approach to
maintain correct airspeed. All power changes should be of small magnitude and smoothly applied while
autopilot is engaged. For approaches without glide path coupling, adjust pitch command disc in conjunction
with power to maintain desired airspeed and descent rate.
2.
Altitude Hold Operation – For best results reduce rate of climb or descent to 500 FPM or less before engaging
altitude hold mode. For precise altitude control in altitude hold mode below approximately 90 KIAS lower up
to 20° flaps.
3.
Instrument Approach Go-Around Maneuver – At the decision height (DH) or missed approach point (MAP)
perform the go-around as follows:
a.
Select pitch mode and adjust for desired attitude.
NOTE
During glide slope coupled approach the pitch command disc can be preset to
the desired attitude. At the decision height, disengage the altitude hold to
initiate the go-around attitude.
b.
Add takeoff power or power as desired.
c.
After positive rate of climb is established, raise landing gear and flaps.
d.
Select HDG mode at coupler for turn from the approach course and set the desired heading on the
DG.
