3-4-4. PRECISION APPROACH PATH INDICATORS (PAPI)

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  • 3-4-4. PRECISION APPROACH PATH INDICATORS (PAPI)

    PAPI systems with remote on-off switching shall be operated when they serve the runway in use and where intensities are controlled in accordance with TBL 3-4-4 except:

    1. As required by local facility directives to meet local conditions.
    2. As requested by the pilot.

    NOTE: The basic FAA standard for PAPI systems permits independent operation by means of photoelectric device. This system has no on-off control feature and is intended for continuous operation. Other PAPI systems in use include those that are operated remotely from the control tower. These systems may consist of either a photoelectric intensity control with only an on-off switch, or a five-step intensity system.

    • REFERENCE
    • FAA Order 6850.2, Visual Guidance Lighting Systems.
    TBL 3-4-4 PAPI Intensity Setting - Five Step System
    Step Period/Condition
    5 On Pilot Request
    4 Day - Sunrise to sunset
    3 Night - Sunset to sunrise
    2 On Pilot Request
    1 On Pilot Request
    *During a 1 year period, twilight may vary 26 to 43 minutes between 25 and 49N latitude.
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