Pilatus PC-12/47E MSN-1001-UP, Maintenance Manual

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Dynamic balancing must be done when propeller vibration is reported.
2 Preparation
2.1 Propeller Inspection
Note
Only qualified persons can do a dynamic balance of the propeller.
2.1.1 Examine the record of balance tests in the aircraft and propeller log books. Make a note of the
positions and quantities of all the corrections.
2.1.2 Open and install a Safety clip (Circuit breaker hold open) (Pt.No. T12-030) on this circuit breaker:
− STARTER (ESSENTIAL BUS).
2.1.3 Remove the engine cowling 42AT.
2.1.4 Remove the access panel 21AL.
2.1.5 Open the engine cowling 43AL.
2.1.6 Hold the spinner dome Figure 1 [3] then remove the screws Figure 1 [6] and washers Figure 1 [5].
Remove the spinner dome Figure 1 [3] from the propeller Figure 1 [4].
2.1.7 Examine the propeller Figure 1 [4] and the spinner dome Figure 1 [3] for the signs of leakage of the
grease.
Note
There can be small leakages of grease after the first operation of a new or overhauled propeller.
2.1.8 Lubricate the propeller, refer to AMM 12-B-12-20-05-00A-902B-A.
2.1.9 Make sure the index placards are installed on the spinner dome Figure 1 [3] and the propeller
bulkhead.
2.1.10 Install the spinner dome Figure 1 [3] on the propeller Figure 1 [4] with the screws Figure 1 [6] and
washers Figure 1 [5].
2.2 Install The Propeller Balancing Kit
2.2.1 From the Propeller balancing kit (Vibrex 8350) (Pt.No. 513.61.12.001) or the Dynamic balancing
equipment (Pt.No. T61-005), install the interrupter bracket Figure 1 [12] and counterweight
Figure 1 [20]:
2.2.1.1 On the spinner dome Figure 1 [3], remove a center screw Figure 1 [6] and washer Figure 1 [5] from
between the propeller blades.
2.2.1.2 Install the interrupter bracket Figure 1 [12] on the spinner dome Figure 1 [3] with the screw Figure 1 [6]
and washer Figure 1 [5].
2.2.1.3 On the spinner dome Figure 1 [3], remove the screw Figure 1 [6] and washer Figure 1 [5] that are 180°
from the interrupter bracket Figure 1 [12].
2.2.1.4 Install the counterweight Figure 1 [20] on the spinner dome Figure 1 [3] with the screw Figure 1 [6] and
washer Figure 1 [5].
2.2.2 Install the velometer Figure 1 [8]:
2.2.2.1 Install the velometer Figure 1 [8] on the velometer bracket Figure 1 [9].
2.2.2.2 Safety the velometer Figure 1 [8] with Lockwire (Pt.No. P02-007).
2.2.2.3 Remove the nut Figure 1 [10] from the front top attachment-stud Figure 1 [11] of the overspeed
governor.
2.2.2.4 Install the velometer bracket Figure 1 [9] on the attachment stud Figure 1 [11] with the nut
Figure 1 [10] so the velometer is at 90° to the horizontal axis of the engine.
PC-12/47E AMM Doc No 02300, ISSUE 01 REVISION 26 MSN 545, 1001-1719,
1721-1999
12-B-AM-00-00-00-I
UNCLASSIFIED
Effectivity: All 12-B-61-00-00-00A-903B-A
UNCLASSIFIED 2021-12-04 Page 4