OPERATION AND INSTALLATION MANUAL
EN-1320
2) AV-723 Propeller Ending in -R(P)
Low pitch can be adjusted by turning the low pitch adjusting nuts in or out.
See Figure 5-18.
•
Turning in: higher pitch
•
Turning out: lower pitch
CAUTION 1: ALL STOPNUTS MUST HAVE THE SAME SETTING TO EACH OTHER,
OTHERWISE THE PITCH CHANGE MECHANISM WILL BE DAMAGED
BECAUSE OF WOBBLING OF THE BETA RING.
CAUTION 2: DO NOT CHANGE THE POSITION OF THE NUTS THAT SET A
MAXIMUM PROTRUSION OF THE BETA RING FROM THE HUB.
SEE BOLD NOTICE IN FIGURE 5-18.
FIGURE 5-18
5.15
Install the spinner dome on support plate, observe mating marks. Torque screws with plastic
washers 3-5 Nm (27 - 44 inlb). Check runout of the spinner dome. Max. 2mm (0.08 inch)
permissible. If excessive runout, then loosen the screws, slightly bump the spinner dome by
hand to reposition it and retighten the screws.
CAUTION:
TEST RUNS OF PROPELLERS WITH INSTALLED DE-ICING SYSTEM ARE ONLY
ALLOWED WITH MOUNTED SPINNER BECAUSE OTHERWISE THE DE-ICING
WIRING WILL BE DAMAGED. BEFORE RUNNING THE ENGINE THE GROUND
MUST BE CLEANED TO AVOID STONE NICKS ON PROPELLER BLADE AND
THE DE-ICERS.
5.16
Cary out a functional check / Propeller check
Start and warm-up the engine per aircraft manufacturer´s manual. Cycle the propeller
control lever at least three times from feather to minimum flight angle to purge air from
propeller hydraulic system. Otherwise propeller surging may occur.
CAUTION: ENGINE AND PROPELLER MANUFACTURERS RECOMMEND NOT TO USE HIGH
ENGINE SPEED ON GROUND, BECAUSE IT CAN RESULT IN AN EXCESSIVE
ENGINE TEMPERATURE AND BLADE DAMAGE. OBSERVE THE AIRPLANE
FLIGHT MANUAL. FOR TPE-331-( ) ENGINES START THE ENGINE ONLY WITH
THE BLADES IN THE STARTLOCK.
Electrothermal de-icing system (if applicable)
Check ammeter reading after switching on the electrical propeller de-ice system. With running
propeller, no time limit for "on" is required. With non-running engine the max. switch-on-time of
the de-icing system is only 60 sec. Otherwise overheating of the de-icing boots will occur.
WARNING: DEICE BOOTS GET HOT AND MAY BURN SKIN IF TOUCHED.
5.17
After the ground run, check for oil leaks, blade shake and condition of the de-ice system.
61-10-20
INSTALLATION AND OPERATION INSTRUCTION
Page 5-14
2019-03-04
