TM 55-2840-231-23
Table 1-11. Functional Test Schedule - Continued
Setting
No.
6
7
8
9
10
Condition
Shut down
Start engine (ac-
celerate to idle:
Takeoff
Idle
Shut down
Time
(minutes)
5
2
N1 speed
(%)
62 to 65
62 to 65
N2 speed
(%)
75 to 105
100
75 to 105
GPTOT
‘F (°C)
See fig.
1-20
1380
(749)
See fig.
1-20
Torque Press
(psi)
0-11
100
0-11
NOTES
A
Observe engine for abnormal conditions such as vibration, noise, or leakage. Light
oil vapor or spewing may occur at the diffuser vent orifice when a new compressor
has been installed. Leakage should cease after high power transients have permitted
seal to wear in.
B
C
D
E
F
G
H
Note
Ref
Make idle speed and start derichment adjustments if required. (Refer to paragraph 6-5,
6-12.) Adjust oil pressure regulator if required, (Refer to paragraph 8-6. )
If the engine is being tested in the airframe, limit collective to just short of lift-off.
Check operation of the anti-icing valve.
.
Give the engine a thorough visual inspection after shutdown. Repeat the check run
. .
if any repairs are necessary as a result of the run or the inspection.
The check run is complete after setting No. 6 unless a new compressor has been in-
stalled. To obtain seal wear-in on the new compressor, continue to the completion
of the listed check run settings.
If the engine is being tested in the airframe, make a test flight IAW TM 55-1500-328-25
and observe published operating limits.
Check the diffuser vent orifice. Repeat settings 7 through 10 until the proper orifice
size is determined. (Refer to paragraph 2-18. )
E,F
G
H
1-154
