No-Gyro Precision Approach

T-34C INSTRUMENTS

CHAPTER SEVEN

Procedures

Maintain altitude and heading as directed by the controller.

Begin descent when directed to "descend to your minimum descent altitude."

Reduce power to 450 ftlbs. and lower the nose to maintain 120 knots (no glidepath

advisories will be given unless requested).

Level off at MDA.

100 feet prior to MDA, initiate level off by adding power to 650700 ftlbs. and

raising the nose.

At the MAP, if the appropriate visual references are not visible or you are not in a

position to make a safe landing, execute the Missed Approach instructions.

705.

NOGYRO PRECISION APPROACH

Reference: NIFM, Chapter 24, "Radar Approaches," AIM, Chapter 5, Section 4, "Arrival

Procedures."

Amplification The NoGyro precision approach is a precision approach flown without the

use of an RMI. In this case the word "gyro" refers to your directional gyro, which provides input

to the RMI. It is conceivable that during flight your RMI could fail while all other systems

essential to flight remain normal. Under such conditions, it would be impossible to perform

Instrument Navigation or execute a published instrument approach. However, if you are under

radar contact ATC can provide a service enabling you to navigate safely under instrument

conditions without an RMI. This service is a nogyro vector. How can you fly a radar vector

with no RMI? The answer is simple if you consider that:

The radar controller can observe the track you are making over the ground and adjust that

track by assigning headings to fly.

Your aircraft has a turn needle (assumed to still be operating).

Your aircraft has an operating attitude gyro.

The radar controller, knowing your present track, can apply a procedure very similar to the timed

turns you learned in BI. In this case the controller tells you to start and stop turns and performs the

timing between starts and stops.

These nogyro vectors can be used to vector you to VFR conditions for a visual landing or to vector

you through a ground controlled approach. This section will address the NoGyro PAR. It is a good

practice to "back up" any Radar approach with a published nonprecision approach if one is

available. Since the NoGyro approach is primarily designed as a response to an inflight equipment

INSTRUMENT NAVIGATION 7-9