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15
2.5 Maintenance
2.5.1 Periodic
Maintenance Schedule
To keep L-861SE threshold/end light fixtures operating efficiently, follow a preventive
maintenance schedule. Refer to Table 7. Refer to FAA AC 150/5340-26 for more detailed
information.
Table 5:
L-861SE Threshold/End Light Fixture Maintenance
Interval
Maintenance Task
Action
Refer to:
Daily
Check for burned out lamp.
After turning off power, replace burned-out
lamps. Refer to the Repair section.
Check for dim lamp.
After turning off power, replace burned-out
lamps. Refer to the Repair section.
After turning off power, check isolation
transformer on series circuit.
Check for broken lens.
Replace lens.
“Maintenance Procedures” on
page 16
Weekly
Check for vegetation.
Remove vegetation. Use weed killer.
Check for dirty lens.
Clean with glass cleaner.
Monthly
Check for misaligned fixture. Straighten, level, and align.
Check for dirty lamp socket. After turning off power, clean lamp socket.
“Maintenance Procedures” on
page 16
Check for dirty frangible
coupling weep holes (stake-
mounted fixtures only).
Clean frangible coupling weep holes.
Check for dirt on fixture drain
holes.
Clean drain holes.
Semiannually
Check for improper ground
elevation.
Grade so frangible point is level with ground
elevation.
Check for improper light
elevation.
Maintain the same elevation for all light
fixtures.
Check for moisture present
in light housing or base.
Check drain holes and clamps. Check lens
for cracks. If damaged, replace. Use water
pump to remove water from the base.
Check for corrosion or loose
or chipped paint.
Scrape and repaint.
Annually
Check for cracks, corrosion,
and shorts.
Repair or replace.
“Maintenance Procedures” on
page 16
Check for dirty contacts.
After turning off power, clean contacts.
“Maintenance Procedures” on
page 16
Check for loose wire
connections.
Tighten wire connections.
Unscheduled
Make prediction of heavy
snowfall, if necessary.
Use red flags or sticks to mark the location
of fixtures to facilitate snow removal and
lessen the chance of damage to fixtures by
snow removal equipment.