Pilot's Operating Handbook
Section 2
Limitations
EASA Approved
Edition 1 - January 15, 2018
Rev. 3
Page 2.8.2
Engine instruments
Engine instrument markings and their color code significance are shown in
figure 2.8.3.
Indication
Red
line or arc
--------------
Minimum
limit
Yellow
line or arc
---------------
Caution
range
Green
line or arc
---------------
Normal
operating
Red line
---------------
Maximum
limit
Oil
temperature
- 40 °C
(- 40 °F)
- 40 to 0 °C
(- 40 to 32 °F)
104 to 110 °C
( 219.2 to 230 °F)
0 to 104 °C
(32 to 219.2 °F)
110 °C
(230 °F)
Oil pressure 60 psi 60 to 105 psi 105 to 135 psi
135 psi
(red line)
normal limit
Generator RPM
(Ng)
--- --- 51 to 104 % 104 %
Propeller RPM
(Np)
--- 450 to 1000 RPM
1950 to 2050
RPM
2050 RPM
ITT
Engine start
or
off
--- 840 to 1090 °C
(1544 to 1994 °F)
400 to 840 °C
(752 to 1544 °F)
840 °C (1544 °F)
normal limit
---------------
870 °C (1598 °F)
(< 20 seconds limit)
---------------
1090 °C (1994 °F)
(red line)
absolute limit
Engine running --- 400 to 840 °C
(752 to 1544 °F)
840 °C (1544 °F)
normal limit
Torque (TRQ) --- 100 % 0 to 100 % 101 %
Figure 2.8.3 - Engine instrument markings
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