Download Voltage-Powered PAPI

96A0209 Rev. AA
Document Date (7/2014)
Refer to Table 8 and Table 9 for the aiming angles for the L-880 and L-881 PAPI light units.
Table 8:
Aiming Angles for L-880 PAPI Units
L-880 (4 box) PAPI
Aiming Angle (Minutes of
Arc)
Aiming Angle (Minutes of
Arc)
Installation
2.3.9 PAPI Aiming Angles
L-880 & L-881 PAPI, Style A
Installation
Note
(Standard Installation)
(Height Group 4 Aircraft*
on Runway with ILS)
Unit nearest runway
30' above glide path
35' above glide path
A
Next adjacent unit
10' above glide path
15' above glide path
A
Next adjacent unit
10' below glide path
15' below glide path
A
Next adjacent unit
30' below glide path
35' below glide path
A
NOTE A: Refer to Table 7 in Siting PAPI with ILS Glideslope in this section.
Table 9:
Aiming Angles for L-881 PAPI Units
L-881 (2 box) PAPI
Aiming Angle (Minutes of Arc)
(Standard Installation)
Unit nearest runway
15' above glide path
Unit farthest from runway
15' below glide path
NOTE: 60 minutes of arc = one degree (60' = 1°).
2.3.10 Assembling
Adjustable Legs
Assemble the legs for each PAPI unit as follows:
See Figure 8. Screw threaded rods (5, 11) into differentials (7) and assemble legs.
NOTE: Do not assemble upper hex nut (1), upper split lockwasher (2), and upper
flatwasher (13). These items will be installed after the PAPI unit is mounted on the legs.
Screw front and rear leg assemblies into the frangible couplings installed on concrete pad.
2.3.11 Mounting Unit
To mount the unit, perform the following procedure:
See Figure 8. Gently mount PAPI unit on the three or four legs so that the unit rests on the
top of the lower flatwasher (12), lockwasher (3), and hex nut (4).
NOTE: For the three-leg PAPI, assemble the upper end of the center rear leg as shown in
Item 14 of Figure 8. Make further adjustment of the leg height by using the PAPI
differential (7).
See also Figure 29 and Figure 30 while mounting unit. Figure 29 shows the two-lamp, fourleg PAPI. Figure 29 shows the two-lamp, three-leg PAPI. Figure 29 and Figure 30 also
apply to the three-lamp PAPI.
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