TM 55-1520-240-T3-1.2 PROXIMITY SWITCH VISUAL CHECK3-1.2 INITIAL SETUPPersonnel Required:Avionic MechanicApplicable Configurations:Medium Helicopter RepairerAllTools:References:TM 55-1520-240-23Aircraft Mechanic’s Tool Kit,NSN 5180-00-323-4692Equipment Condition:Battery DisconnectedMaterials:Electrical Power OffNoneAft Landing Gear Access Panels OpenTASKRESULT1.2.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 leftand right GROUND CONTACT lights (6If either relay is loose or damaged, tighten or replaceit 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 ordamaged, tighten or replace it as required. If wiringto 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 orreplace it as required.3.4.5.and 7).FOLLOW-ON MAINTENANCE:Aft landing gear access panels closed.END OF TASKChange 3 3-9
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