Operating and Maintenance Manual
PAPI 400
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4.4.8 For each lamp one feeding cable made of synthetic rubber insulated, (AWG
12)flexible cable, polychloroprene sheathed with factory moulded 2 pole plug in
accordance with FAA specification L-823, fig.1.a, and protected by a stainless steel
reinforced flexible conduit for its run outside the PAPI unit, down to the transformer
housing base cover.
4.4.9 One special steel cover plate of sufficient diameter with glands to accommodate the
feeder cable flexible conduits and suitable for mounting on top of a galvanized steel
base.
4.4.10 The PAPI unit shall be compact in order to afford a minimum drag to jet blast and
withstand minimum 170Km/h wind force
4.4.11 The unit shall be fully corrosion proof. The housing, optical frame, cover, breakable
coupling, flange, and cover plate shall be protected by a stove baked polyester paint
deposited by an electrostatic process.
4.4.12 All screws, nuts and hardware shall be made of plain stainless steel and all
elements that have to be removed to service the unit shall be captive.
4.4.13 The stainless steel cover closing latches shall be padlockable.
4.4.14 The use of special instrument or bench for resetting the beam after reflector and it
shall be possible to relamp the fitting or to change the red filter without using any tool.
4.4.15 relamping , filter or lens replacement is not permitted.
4.4.16 The unit will be completely dusttight and closed.
4.4.17 Drainage special holes will be provided for the eventual condensation water.
4.4.18 Lamp changing does not require calibration nor adjustment of the unit. Maintenance
operations are strictly reduced to relamping on site in matter of minutes.
4.6 Mounting
The PAPI unit shall be secured by means of its breakable couplings and flanges on a
concrete slab.
Its feeding cables mechanically protected shall run down into a transformer housing base
cast in the concrete foundation behind it.
4.7 Lamps
The lights will comply with the specifications indicated, with three prefocused max. 200W
6.6A lamps.
