TM 55-1520-240-T
3-1.2 PROXIMITY SWITCH VISUAL CHECK
3-1.2
INITIAL SETUP
Personnel Required:
Avionic Mechanic
Applicable Configurations:
Medium Helicopter Repairer
All
Tools:
References:
TM 55-1520-240-23
Aircraft Mechanic’s Tool Kit,
NSN 5180-00-323-4692
Equipment Condition:
Battery Disconnected
Materials:
Electrical Power Off
None
Aft Landing Gear Access Panels Open
TASK
RESULT
1.
2.
Check left and right Ianding gear proximi-
ty switch relays (1 and 2).
Check right landing gear proximity switch
(3).
Check target (4) and linkage (5).
Repeat steps 2 and 3 for left landing gear prox-
imity switch.
On maintenance panel with , check left
and right GROUND CONTACT lights (6
If either relay is loose or damaged, tighten or replace
it as required. If wiring to the relay socket is dam-
aged, repair or replace it as required.
If right landing gear proximity switch (3) is loose or
damaged, tighten or replace it as required. If wiring
to the switch is damaged, repair or replace it as re-
quired.
If either target (4) or link (5) is loose or damaged,
tighten or replace it as required.
If either light (6 or 7) is loose or damaged, tighten or
replace it as required.
3.
4.
5.
and 7).
FOLLOW-ON MAINTENANCE:
Aft landing gear access panels closed.
END OF TASK
Change 3 3-9
