TM 55-1510-215-10
Table 5-1. Engine Operating Limitations
OPERATING LIMITS
POWER
RATING
h
H MAX
OIL
1
2
3
H
4
MAX
OBSERVED
N2 RPM
PRESS
OIL
OIL
TEMP C
TEMP C
TIME
FT LB
ITT
N1%
(PROP)
PSIG
TAKEOFF
5 MINUTES
1315
750
101.5
2200
65-85
10-99
10-85
5
MAXIMUM
CONTINUOUS
1315
750
101.5
2200
65-85
10-99
10-85
NORMAL RATED
CONTINUOUS
1315Q
725
---
2200
65-85
0-99
0-85
CLIMB
NORMAL RATED
CONTINUOUS
1315Q
705
---
2200
65-85
0-99
0-85
HIGH IDLE (73% N1)
CONTINUOUS
---
---
---
---
---
0-99
0-85
685 6
LOW IDLE (54% N1)
CONTINUOUS
---
---
---
40 (MIN)
-40-99
-40-85
STARTING
---
---
1090 (2 SEC)
---
---
---
-40 (MIN)
-40 (MIN)
2 SECONDS
1500
850
102.6
---
---
0-99
0-85
MAX REVERSE
1 MINUTE
---
750
88
---
65-85
0-99
0-85
PROP FEATHER
CONTINUOUS
525
---
---
---
---
---
---
2 SECONDS
1500
---
---
---
---
---
---
GENERATOR LOAD
MINIMUM ENGINE RPM
0 to .5 Load
50%
.5 to .75 Load
57%
.75 to .90 Load
59%
.90 to 1.0 Load
63%
Each column is a separate limitation. The stated limits do not necessarily occur simultaneously.
H
h
The limit values within the N2 RPM (PROP) column are not propeller limitations. These values specify propeller
RPMs which correspond to stress limits of the engine power section.
This is an engine gearbox torque limit which shall not be exceeded under steady state or continuous engine
Q
operation.
4
For every 10 below -30C ambient temperature,
85C maximum when using engine oil spec.
1
reduce maximum allowable N1 by 2.2%.
MIL-L-7808.
Oil pressure below 65 PSIG is undesirable at power
This power rating is intended for emergency use at
2
5
settings above 75% N1. Flight may be completed at a
the discretion of the pilot.
reduced power setting, but the cause of low oil
pressure should be corrected prior to next flight. Oil
High ITT may be decreased by reducing accessory
6
pressure below 40 PSIG requires engine shutdown.
load and/or increasing N1 speed.
3
7
99C maximum when using engine oil spec.
High generator loads at low N1 speeds may cause
the ITT acceleration temperature limit to be
MIL-L-23699.
exceeded. Observe the above generator limits.
APOO5761
5-6 Change 7
