Federal Aviation Administration Twentieth Edition
operation. The 3.step and 2.step lighting facilities be extinguished prior to end of the 15.minute period can be altered in intensity, while the 1.step cannot. (except for 1.step and 2.step REILs which may be All lighting is illuminated for a period of 15 minutes turned off when desired by keying the mike 5 or from the most recent time of activation and may not 3 times, respectively).
FIG AD 1.1.10
Runway Entrance Lights
FIG AD 1.1.12
Taxiway Lead.On Light Configuration
TBL AD 1.1.2
Runways With Approach Lights
Lighting System Number of Intensity Steps Status During Nonuse Period Intensity Step Selected Per Number of Mike Clicks
3 Clicks 5 Clicks 7 Clicks
Approach Lights (Med. Int.) 2 Off Low Low High
Approach Lights (Med. Int.) 3 Off Low Med High
MIRL 3 Off or Low . . .
HIRL 5 Off or Low . . .
VASI 2 Off . . .
NOTES: .Predetermined intensity step. .Low intensity for night use. High intensity for day use as determined by photocell control.
Federal Aviation Administration Twentieth Edition
TBL AD 1.1.3
Runways Without Approach Lights
Lighting System Number of Intensity Steps Status During Nonuse Period Intensity Step Selected Per Number of Mike Clicks
3 Clicks 5 Clicks 7 Clicks
MIRL 3 Off or Low Low Med. High
HIRL 5 Off or Low Step 1 or 2 Step 3 Step 5
LIRL 1 Off On On On
VASI. 2 Off . . .
REIL. 1 Off Off On / Off On
REIL. 3 Off Low Med. High
NOTES: .Low intensity for night use. High intensity for day use as determined by photocell control. .The control of VASI and/or REIL may be independent of other lighting systems.
12.8.4 Suggested use is to always initially key the mike 7 times; this assures that all controlled lights are turned on to the maximum available intensity. If desired, adjustment can then be made, where the capability is provided, to a lower intensity (or the REIL turned off) by keying 5 and/or 3 times. Due to the close proximity of airports using the same frequency, radio controlled lighting receivers may be set at a low sensitivity requiring the aircraft to be relatively close to activate the system. Consequently, even when lights are on, always key mike as directed when overflying an airport of intended landing or just prior to entering the final segment of an approach. This will assure the aircraft is close enough to activate the system and a full 15 minutes lighting duration is available. Approved lighting systems may be activated by keying the mike (within 5 seconds) as indicated in TBL AD 1.1.4.
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