NTS Procedures

Question 1

FE Setup Steps

Answer 1

NSWE

NTS Switch - Fx check
Sync Master and Sync Servo for engines being checked - Off
Wing Deice Switches - Open
Engine Anti-Ice - On

Question 2

Pilot Setup

Answer 2

For gripe:
Altitude - 8,000 ft or below
Airspeed - 180 +- 10kts

General:
Airspeed at where you intend to restart
Check FE setup
Give FE Engine to check

Question 3

NTS Check Steps (After Setup)

Answer 3

Horsepower - 800 SHP minimum
Engine Bleed Air switch - open
Power lever - retard slowly towards flight idle. After at idle and NTS initiated, call action and restore power

Clean up:
Engine Bleed Air switch - close
Engine anti-ice - as required
Wing Deice - as required
NTS Fx Valve Switch - NTS Check
Sync System - As required

Question 4

NTS Indications

Answer 4

Primary:
Stabilized RPM below mechanical propellor governing RPM but above 95% with power lever at flight idle

Secondary:
Initial and/or continued flashing of Fx valve light
Intial and/or continued negative horsepower within prescribed limits
Noticeable aircraft yaw in sync with NTS operation

Question 5

Stuck NTS Plunger

Answer 5

Plunger extends but fails to retract when NTS clears. SHP will go positive and RPM will drop quickly

Pull E - Handle, could flame out with rapid TIT rise if RPM falls below 95%

Question 6

Stuck Power Lever

Answer 6

Over Rotated Alpha Shaft or linkage problem

To correct:
Clean up NTS check to make engine more efficient
Speed up to get more ram air and fuel allowing NTS push rod to retract

If fails:
E-Handle

If E-handle fails:
Feather button

Question 7

Overspeed During NTS Check

Answer 7

Caused by over rotated Alpha Shaft - Correct the same as stuck power lever

To correct:
Clean up NTS check to make engine more efficient
Speed up to get more ram air and fuel allowing NTS push rod to retract

If fails:
E-Handle

If E-handle fails:
Feather button