Cessna 172 R - Oil pressure; ENGINE INSTRUMENT MARKINGS

Supplement POH
Cessna 172 R&S
(FAA-Version)
Page 2-4
Issue 3
Revision 2, Mar. 2022
Oil pressure
Minimum oil pressure: ........................................ 1.2 bar (17.4 psi)
Minimum oil pressure (at Take-off power) .......... 2.3 bar (33.4 psi)
Minimum oil pressure (in flight) ........................... 2.3 bar (33.4 psi)
Maximum oil pressure ............................................ 6.0 bar (87 psi)
Maximum oil pressure (cold start < 20 sec.): ...... 6.5 bar (94.3 psi)
Maximum oil consumption: .............................. 0.1 l/h (0.1 quart/h)
ENGINE INSTRUMENT MARKINGS
The engine data to be monitored are integrated in the combined
engine instrument CED-125.
The ranges of the individual engine monitoring parameters are
shown in the following table.
Table. 2-3b Markings of the engine instruments
 Note: “Load“ describes the available percentage
of maximum engine power.
Instrument
AED/CED
Red
range
Amber
range
Green
range
Amber
range
Red
range
Tachometer [RPM] -------- -------- 0-2300 -------- > 2300
Oil pressure
[bar] 0 - 1.1 1.2 - 2.2 2.3 - 5.1 5.2 - 6.5 > 6.5
[psi] 0 - 16 17.4 - 32 33.4 - 74 75.4 - 87.0 > 87.0
Coolant
temperature
[°C] < -32 -32...+59 60 - 100 101 - 105 > 105
Oil
temperature
[°C] < -32 -32...+49 50 - 129 130 - 140 > 140
Gearbox
temperature
[°C] -------- -------- < 115 115 - 120 > 120
Load [%] -------- -------- 0 - 100 -------- --------
Fuel
Temperature
(left and right)
[°C] < -30 -30...-1 0 - 69 70 - 75 > 75
Alternator
Current
[A] -------- -------- 0 - 52.4 52.5 - 60 >60
Electrical
System
Voltage
[V] 0 - 21 22 - 24 25 - 29.4 29.5 - 30 >30