Nh Indicating System − Maintenance Practices - De Havilland DASH8 100 Series Maintenance Manual

NH INDICATING SYSTEM − MAINTENANCE PRACTICES
1. Removal/Installation
The maintenance procedures that follow are for the removal and installation of the (NH)
indicators.
A. Removal of the (NH) Indicators
WARNING:
(1) Remove electrical power from aircraft.
(2) Open, safety clip and tag the circuit breakers that follow:
CIRCUIT BREAKER PANEL
LEFT DC
LEFT DC
RIGHT DC
RIGHT DC
RIGHT DC
(3) Loosen the (NH) indicator top right and lower left securing screws approximately
five turns.
(4) Push in the (NH) indicator top right and lower left securing screws to disengage the
clamping mechanism.
(5) Slide out the (NH) indicator.
(6) Disconnect the connector and remove the (NH) indicator.
B. Installation of the (NH) Indicators
(1) Make sure the aircraft is in the removal configuration.
(2) Reconnect the electrical connector to the (NH) indicator.
(3) Insert and align the (NH) indicator and tighten the securing screws.
(4) Remove the safety clips and tags and close the circuit breakers that follow:
CIRCUIT BREAKER PANEL
LEFT DC
LEFT DC
RIGHT DC
RIGHT DC
RIGHT DC
(5) Remove all tools, equipment and unwanted materials from the work area.
MASTER
EFFECTIVITY:
D
S ERIES 100
AIRCRAFT MAINTENANCE MANUAL
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.
CIRCUIT BREAKER NO.
H5
S2
H5
A1
R3
CIRCUIT BREAKER NO.
H5
S2
H5
A1
R3
NAME
ENG 1 NH IND
IND LCD HTR
ENG 2 NH IND
IND LCD HTR
ENG INSTR
NAME
ENG 1 NH IND
IND LCD HTR
ENG 2 NH IND
IND LCD HTR
ENG INSTR
77−12−00
Page 201
Jun 20/2005