MAINTENANCE MANUAL
Effectivity: All
Page 61-11
Edition 2 | Rev. 1
CONTROLLING
1. DESCRIPTION AND OPERATION
KW-31-033 propeller blade pitch setting is enabled by a servomotor which is controlled by the
electronic propeller governor CS 3-5 (Fig. 61-4). The propeller governor is standardly located on the
central console below the instrument panel.
The propeller governor operates in two modes:
• automatic – the instrument evaluates actual engine speed, compares the value with pre-set value,
and keeps the actual engine speed within pre-set tolerance. The propeller is operated in constant
speed mode.
• manual – pilot controls the propeller blades adjustment in accordance with the specific flight
modes.
Propeller wiring diagram is given in Section 91.
Legend to Fig. 61-4
1 Min. pitch annunciator 6 Symbol of the signal to change the pitch
2 Max. pitch annunciator 7 Set (required) engine speed
3 Automatic mode annunciator 8 Mode selector
4 Mode selection annunciator 9 Propeller control switch
5 Current engine speed 10 Value setting control knob
Fig. 61-4 Electronic propeller governor CS 3-5
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