Supplement Airplane Maintenance Manual
Cessna 172 with TAE 125-02-99 / -114
AMM-20-02
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20-AMM-31-02
3
06.11.2013
3
8
1
25.08.2014
31.60 INDICATING INSTRUMENTS
CED 125
Figure 2 CED 125
The engine data of the engine installation 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 31-3a Markings of the CED 125
Instrument
Red
Range
Amber
Range
Green
Range
Amber
Range
Red
Range
Tachometer [rpm] - - 0-2300 - > 2300
Oil Pressure [mbar] 0-1200 1200-2300 2300-5200 5200-6000 > 6000
Oil Pressure [psi] 0-17.4 17.4-33.4 33.4-75.4 75.4-87 > 87
Coolant
Temperature [°C]
< -32 -32...+60 60-101 101-105 > 105
Oil Temperature
[°C]
< -32 -32...+50 50-125 125-140 > 140
Gearbox
Temperature [°C]
- - < 115 115-120 > 120
Load [%] -
-
Note: If an engine reading is in the amber or red range, the "Caution"
lamp is activated. It only extinguishes when the
"CED/AED-Test/Confirm" button is pressed. If this test button is
pressed longer than a second, a self test of the instrument is
initiated.
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