Power turbine speed (PT) speed indicator

TB 1-4920-443-35

AEDATS IV T53/T55/T63 ALIGNMENT WORKSHEET

b. Speed measurement system, (Refer to page 54 step 48) Tach. Gen

(1) Power turbine speed (PT) speed indicator

(a) Set calculating counter controls as follows: (Channel 2)

1 DEC

5

2 C

14286

3 10n

0

4 Auto

depressed

5 x10

released

6 Sample rate (fast)

1

7 Test

released

(b) Input the following frequencies into the flight harness or engine harness connector

1 T55 Flight Harness pins D and E

2 T53 Flight Harness pins E and F

T53 Engine harness pins A and B

3 T63 Flight Harness pins A and B

NOTE

Ground E 0n TB810 term. #17 if engine is not mounted (will not read) speeds.

(c) Set the tachometer tester controls to the following:

1 Motor direction-stop,

2 Set rpm-10%,

3 Power on

4 Set the motor direction switch to forward.

Tachometer

Calculating

AEDATS 4

Gauge Analog

Gauge Digital

tester

counter

+/- .3%

(N2)

+/- .3%

+/- .01hz

7hz (10%)

____________

28hz (40%)

____________

42hz (60%)

____________

56hz (80%)

____________

70hz (100%)

____________

T53 - Transducer: T48

Hardware Name: F03

T55 - Transducer: T49

Hardware Name: F03

T63 - Transducer: T50

Hardware Name: F03

No alignment requirement must verify frequencies.

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