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5.0 Maintenance and Repair
This section provides preventive maintenance for L-849 Runway End Identifier Lights (REIL) system.
Warning
Read the instructions in their entirety before starting any maintenance activities.
Disconnect power to the lighting circuit before attempting to make any electrical repairs.
Coordinate a power outage with air traffic personnel before turning off power to the airport lighting system.
Allow only qualified personnel to perform the following tasks.
Observe and follow the safety instructions in this document and all other related documentation.
5.1 Maintenance Schedule
To keep the L-849 REIL system operating efficiently, follow a preventive maintenance schedule. Refer to Table 8 .
Table 8: L-849 REIL Maintenance
Interval Maintenance Task Action
Daily Check LED operation and flashing sequence. If flashing malfunctions, follow Troubleshooting procedures.
Bimonthly
Check operation of controls. If controls malfunction, replace controls.
Check cleanliness of front glass. If dirty, clean front glass as required.
Monthly
Check operation of interlocks. If interlocks malfunction, replace interlocks.
Check for vegetation or other obstruction
near
LED engine.
Use herbicide or manually to remove vegetation.
Semi-Annually
Check cabinets for cleanliness and moisture. If cabinets are moist, wipe dry.
Check seals on enclosures. Replace worn or deteriorated seals.
Check electrical connections and terminal
block contacts for tightness.
If connections are loose, repair or replace.
Check cabinet vertical and horizontal
alignment.
Realign cabinet if needed.
Check wires for cracks and deterioration. If wires are cracked or deteriorated, replace wires.
Check for rigidity of support structures. Tighten all mounting hardware.
Annually
Verify incoming power is within tolerance. Calibrate or repair power distribution equipment if needed.
Check insulation resistance of external
interconnection wiring.
If reading is less than 50M ohms at 1000VDC, replace wiring.
Check resistance of grounding system.
If resistance is greater than 25 ohms to earth, take steps necessary to
lower resistance.
Check need for painting. Touch up any painted surface.
5.1.1 Replacing LED PCB Assembly
To remove and replace the LED PCB Assembly see Figure 9 and then proceed as follows:
96A0461, Rev. H, 2019/10/31 29
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