Pilot’s Operating Handbook
2-7
DO NOT USE FOR FLIGHT OPERATIONS
Section 2
LIMITATIONS
100 SERIES
Limitations
Operation
Max
Torque
Maximum
ITT°C
Gas
Generator
RPM
(%
)
Propeller
RPM
Oil
Pressure
PSIG
(1)
Oil
Temp.
°C
(2)
SHP
(8)
Takeoff
1790
1970 (3)
790 101.6
2200
2000
85 to 105 10 to 99
750 @
<31.0°C
Max
Climb
1670
1840 (3)
765 101.6
2200
2000
85 to 105 0 to 99
700 @
<28.3°C
Max
Cruise
1670
1840 (3)
740 101.6
2200
2000
85 to 105 0 to 99
700 @
<19.4°C
Idle — 685 (5)
52.5 to
55.5 (12)
— 40 (min) -40 to 99 —
Max
Reverse (6)
1875 790 101.6 2100 85 to 105 0 to 99
750 @
<31.0°C
Transient 2100 (7) 850 (4) 102.6 (4) 2420 (9) 85 to 105 0 to 99 —
Starting — 1090 (10) — — —
-40
(min)
—
Max
Continuous
Emergency
(11)
1790
1970 (3)
790 101.6
2200
2000
85 to 105 10 to 99
750 @
<31.0°C
NOTE (1): The minimum oil pressure is 85 PSI, at gas generator speeds above 72%, with the oil
temperature between 60°C and 70°C. Oil pressures below 85 psi are considered critical and should only
be tolerated for the minimum amount of time to complete the ight, while operating under a reduced power
setting. Oil pressure indications below 85 psi should be reported as a discrepancy and corrected prior to
the next ight. Oil pressure indications below 40 PSI are unsafe and require engine shutdown or a landing
be made as soon as possible, using the minimum power required to sustain ight.
NOTE (2): For increased oil service life, an oil temperature between 74°C and 80°C is recommended.
A minimum oil temperature of 55°C is required for proper operation of the fuel heater, prior to attaining
takeoff power.
NOTE (3): Propeller RPM must be set at or below 2000 RPM when achieving this maximum torque value.
Max Torque for Takeoff is limited to 5 minutes.
NOTE (4): These values are time limited to two (2) seconds.
NOTE (5): Increase
to keep within this limit.
NOTE (6): Reverse thrust operation is limited to one (1) minute.
NOTE (7): This value is limited to twenty (20) seconds.
NOTE (8): The maximum shaft horsepower for takeoff/max continuous is 750. The maximum shaft
horsepower for climb and cruise is limited to 700. The engine may not produce these maximum ratings
under certain temperature and altitude combinations (as reected in the T
akeoff, Climb and Cruise
Performance charts).
NOTE (9): In the event of failure of the main propeller governor, causing an overspeed condition, it is
permissible to complete a ight with the propeller controlled via the overspeed governor, provided this limit
is not exceeded.
NOTE (10): This value is time limited to 2 seconds. Starting temperatures above 850°C should be
investigated for cause of problem.
NOTE (11): Use of this rating is intended for emergency or abnormal conditions (i.e., maintaining altitude
in extreme wind-shear or icing conditions).
Note (12): When Air Conditioning is ON, refer to minimum
on Max Generator Power Figures in
Chapter 5.
Table 2-4 – PT6A-34 Engine Operating Limits
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