1
Engine inlet condition limits for the operation of the engine are:
−
Altitude range: Sea level to 30,000 ft
−
Temperature: 57.2 °C (135 °F) at the engine inlet connection.
2
The torque limit is in the propeller operation range of 1000 to 1700 RPM. At less than
1000 RPM the torque limit is 23.92 psi.
3
Maximum recommended torque at 1700 rpm is 44.34 psi. Torque limit of 44.84 psi is
provided to allow operation at reduced NP speed at quoted power setting.
4
Usual oil pressure is between 90 and 135 psi at Ng speeds of more than 72%. If engine
torque is less than 35.87 psi the minimum oil pressure is 85 psi with an oil temperature of
between 60 and 70 °C.
5
Oil pressures of less than 90 psi are not recommended. A low oil pressure of 60 psi is
permitted at torques of less than 23.92 psi. Oil pressures less than 60 psi are not safe
and it will be necessary to stop the engine.
6
The time limit for maximum start engine Inter Turbine Temperature (ITT) is 5 seconds.
7
Engine oil temperature must be 15 °C or above prior to setting takeoff power on ground.
Engine oil temperature must be 10 °C or above when operating with anti-icing additives.
8
For the Np range of 900 RPM or more.
9
Takeoff power rating is limited to 5 minutes duration. The limit for oil temperatures
between 105 and 110 °C is 10 minutes for all operations.
10
The time limit for transient torque, ITT, Np and oil pressure is 20 seconds.
11
The usual maximum ground reverse limit is an Np of 1615 RPM ± 20 RPM.
12
During steady state operation a variation of ± 30 rpm is permitted to account for power
governing accuracy.
2-4-5
Fuel
for approved fuels.
Table 2-4-2: Approved Fuels
APPROVED FUEL
SPECIFICATION
Unrestricted use
JET A
ASTM-D1655
CAN/CGSB-3.23
JET A-1
ASTM-D1655
IATA
JFSCL
GOST R 52050
QAV-01
CAN/CGSB-3.23
DEF STAN 91-91
JP-5
MIL-DTL-5624
DEV STAN 91-86
Section 2 - Limitations (EASA Approved)
Fuel
Pilot's Operating Handbook
Report No: 02406
Issue date: Dec 18, 2020
Page 2-4-3
12-C-A15-10-0204-00A-043A-A
FOR
GENERAL
AND
FAMILIARIZATION
PURPOSES
ONLY
