**ON A/C ALL
PROPELLER (PROP RPM) INDICATING SYSTEM − MAINTENANCE PRACTICES
1.
Removal/Installation
The following maintenance procedures are approved for the removal and the installation of
the propeller (PROP RPM) indicators.
A.
Removal of the Propeller (PROP RPM) Indicator
WARNING:
REMOVE ALL ELECTRICAL POWER FROM THE AIRCRAFT
BEFORE YOU DO MAINTENANCE. PUT WARNING PLACARD AT
THE EXTERNAL POWER RECEPTACLE AND IN FLIGHT
COMPARTMENT. THIS IS NECESSARY TO PREVENT
ELECTRICAL SHOCK TO PERSONS AND/OR DAMAGE TO THE
EQUIPMENT.
(1) Remove electrical power from aircraft.
(2) Open, safety clip and tag the circuit breakers that follow:
CIRCUIT BREAKER PANEL
CIRCUIT BREAKER NO.
NAME
LEFT DC
G5
ENG 1 NP IND
LEFT DC
S2
IND LCD HTR
RIGHT DC
G5
ENG 2 NP IND
RIGHT DC
A1
IND LCD HTR
RIGHT DC
R3
ENG INSTR
(3) Loosen the propeller (PROP RPM) indicator top right and lower left securing screws
approximately five turns.
(4) Push in the propeller (PROP RPM) indicator top right and lower left securing screws
to disengage the clamping mechanism.
(5) Slide out the propeller (PROP RPM) indicator.
(6) Disconnect the connector and remove the propeller (PROP RPM) indicator.
B.
Installation of the Propeller (PROP RPM) Indicator
(1) Make sure the aircraft is in the removal configuration.
(2) Reconnect the connector to the propeller (PROP RPM) indicator.
(3) Insert and align the propeller (PROP RPM) indicator.
(4) Tighten the top right and lower left securing screws.
(5) Remove the safety clips and tags and close the circuit breakers that follow:
CIRCUIT BREAKER PANEL
CIRCUIT BREAKER NO.
NAME
LEFT DC
G5
ENG 1 NP IND
LEFT DC
S2
IND LCD HTR
RIGHT DC
G5
ENG 2 NP IND
RIGHT DC
A1
IND LCD HTR
RIGHT DC
R3
ENG INSTR
D
SERIES 100
AIRCRAFT MAINTENANCE MANUAL
MASTER
EFFECTIVITY: See Pageblock 61−44−00 page 201
61−44−00
Page 201
Jun 20/2005
