LED Precision Approach Path Indicator
The PAPI-L system uses a
single LED light channel on each light unit to provide the pilot precise visual
information, enabling the approach procedure to be performed with the utmost
accuracy and safety.
The Type L-880 PAPI system
consists of four light units located at the side of the runway adjacent to the
origin of the glide path. The nominal glide slope angle is midway between the
angular settings of the central pair of the four units. If an aircraft is on
the correct approach path, the pilot will see two red and two white light
indicators. If the aircraft approach is too high, an increased number of white
light indicators will be seen. If the approach is too low, the pilot will note
an increased number of red light indicators.
The Type L-881 PAPI system is
identical to the L-880, except only two light units (instead of four) are used.
The nominal glide slope is midway between the angular settings of the two
units, and when the pilot is on or close to the correct approach path, the unit
nearest the runway will be seen as red and the other unit as white. The Style A
system is for use with an AC voltage input. The Style B system is for use on
6.6 A or 20 A series circuits.
Compliance Standards:
- FAA: L-880(L) & L-881(L)
AC 150/5345-28 (Current Edition) ETL Certified.
- ICAO: Annex 14, Vol. 1, para. 5.3.5.23 to 5.3.5.45
- Transport Canada: TP 312 par. 5.3.6.14 and Appendix B, section B.3.1.
- CE: Complies with the requirements of the EMC
