GRUMMAN AMERICAN
FOR TRAINING USE ONLY – SECTION 9
MODEL GA-7/COUGAR
SUPPLEMENTS
9-8
Issued: April 10, 1978
4.
Slaving Failure – (i.e. failure to self correct for gyro drift):
a.
Check gyro slaving switch is set to No. 1 position (if equipped with Slave No. 1 – No. 2 switch) or
“SLAVED” position when equipped with slaved and free gyro mode switch.
b.
Check for HDG Flag.
c.
Check compass circuit breaker.
d.
Reset heading card while observing slaving meter.
NOTE
Dead slaving meter needle or a needle displaced fully one direction indicates a
slaving system failure.
e.
Select slaving amplifier No. 2, if equipped. If not equipped, proceed with item g, below.
f.
Reset heading card while checking slaving meter. If proper slaving indication is not obtained.
g.
Switch to free gyro mode and periodically set card as an unslaved gyro.
NOTE
In the localizer mode, the “TO-FROM” arrows may remain out of view,
depending upon the design of the NAV converter used in the installation.
SECTION 4
NORMAL PROCEDURES
AUTOPILOT
1.
Navigation receiver selector switch (NAV 1/NAV 2 Tracker) allows selection of NAV 1 or NAV 2 for autopilot
operation.
2.
Refer to Edo-Aire Mitchell Pilot’s Operating Manual, P/N 68S25, dated 2-71 for autopilot preflight and normal
inflight procedures, and DG 360A – NSD 360A Operator’s Manual, P/N 68S85, dated 4-1-74, revised 5-1-76.
TRIM SYSTEM
GENERAL
This airplane is equipped with an electric elevator trim system that has two operating modes:
1.
Manual command trim
2.
Auto trim follow-up mode when the autopilot is engaged
The electric trim system is designed to withstand any type of single malfunction, either mechanical or electrical,
without uncontrolled operation resulting. The preflight check procedure is designed to uncover hidden failures
that might otherwise go undetected. Proper operation of the electric elevator trim system is predicated on
conducting the following preflight check before each flight. If the trim system fails any portion of the procedure,
turn the trim circuit breaker OFF and leave the system OFF until trim system is repaired. Substitution of any trim
system component for another model is not authorized. For emergency interrupt information, refer to
EMERGENCY PROCEDURES Section of this supplement.
The command electric trim switch on the left hand portion of the pilot’s control wheel has two functions:
1.
When the top bar (autopilot OFF) is pressed, it disconnects the autopilot.
