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CHAPTER THREE
T-34C INSTRUMENTS
7.
Common Errors
a.
Not entering VPS prior to starting the pattern.
b.
Not transitioning at proper time or altitude. After the last 250 foot checkpoint, you
should anticipate the transition.
c.
Not transitioning entirely on gyro, especially attempting the transition while
watching the altimeter.
d.
Not using rudder during power changes, resulting in heading drift.
308.
GCA MANEUVER
1.
The GCA maneuver closely resembles the procedures used for an instrument Ground
Controlled Approach (GCA).
2.
The GCA maneuver is begun in normal cruise on a cardinal heading and base altitude.
a.
While maintaining heading and altitude, make a level transition to the Basic
Approach Configuration (BAC):
i.
Reduce power to 450 ft­lbs torque, applying slight left rudder pressure to
compensate for the power reduction.
ii.
Check airspeed below 150 KIAS and lower the gear. Maintain the level flight
attitude on the attitude gyro and anticipate trim, right rudder up elevator.
iii.
Slowly raise the nose, to maintain altitude while decelerating to 120 KIAS,
toward the BAC level attitude (approximatelynose up). Trim right rudder,
nose up.
iv.
As you approach 120 KIAS, readjust power to approximately 700­750 ft­lbs.
Maintain 120 KIAS and retrim.
b.
Perform the Landing Checklist down to the flaps, reporting each item to your
instructor. Check landing lights on.
c.
Make a Standard­Rate Turn (two­needle width turn) in either direction for 90º of
heading change while maintaining altitude. Lead the rollout by one­third the AOB.
d.
Upon rolling out of the turn, stabilize the aircraft on altitude heading, and airspeed.
e.
Make a level flight transition to the Final Approach Configuration (FAC) by
reducing power to 450 ft­lbs of torque, checking the airspeed below 120 KIAS, and
lowering full flaps. As the flaps extend, smoothly lower the nose toward the FAC
3-20 BASIC INSTRUMENTS FLIGHT PROCEDURES


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