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 MIL-HDBK-1023/4
Table A-1
Beacons
Tolerance / limit
Parameter
Standard
Initial
Operating
1. Rotation speed
1 rpm
a. 10-inch
6 rpm
Same as standard
1 rpm
12 rpm
Same as standard
1 rpm
b. 36-inch
6 rpm
Same as standard
3 percent
5 percent
2. Input voltage
Same as lamp voltage rating
degree from
3. Vertical
Locally established
Same as initial
aiming
between 2-10 degrees
established angle
Table A-2
Medium Intensity Approach Lighting Systems With Flashers (MALSR)
Tolerance / limit
Parameter
Standard
Initial
Operating
1. Light units operational
a. Steady burning
All
All
15% lamps out (random) - 2
lamps out; in 5-light bar - 1
light bar out
b. Flashing
All
All
1 unit out
2 fpm
2 fpm
2. Flashing rate
120 fpm
3%
5%
3. Input voltage
120 V or 240 V
4. Light unit alignment
1 degree
2 degrees
a. Vertical
Locally established
1 degree
2 degrees
b. Horizontal
Parallel to runway
centerline
No obstruction
5. Obstructions due to
Same as
Same as standard
vegetation, etc.
standard
117
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