MIL-HDBK 1028/6A
Section 7:
AIRCRAFT SERVICE POINTS
7.1
Parking Apron Service Points. The function of the service point
is to dispense compressed air and electrical services for aircraft ground
support on the parking apron. Each island serves two aircraft. For
details of construction and equipment installations see Figures 8, 11, 12,
13, and 14.
7.1.1
Construction. Service points shall have low profile design
structures fabricated of steel angle frame with sheet steel side panel
enclosures. Top panels are of one-piece formed aluminum and bolted to the
frame. The enclosure is vented at top and bottom. The assembly is mounted
on a concrete base pad approximately 6 in. (152 mm) above the apron grade.
Service point structures shall be protected from vehicular traffic with
concrete-embedded steel posts.
7.1.2
Mechanical Equipment Components. Compressed air piping and
appurtenances shall be contained in rear half of the superstructure. Each
island is served by a 3 in. (76 mm) line from the underground main. A 3 in.
main shutoff valve shall be provided with moisture blow-off valves before
and after. A 3 in. main pressure-reducing valve provided 45 psig (310.26
kPa) supply to a 3 in. flexible hose connector mounted externally on the
end of the enclosure. Flexible aircraft starting air hose (Government-
furnished equipment) is attached to the swivel joint. A pressure switch is
provided at the outlet of the pressure-reducing valve which activates a low
pressure warning light mounted on the exterior of the enclosure.
a) The pneumatic tool air is supplied by connection to the
3 in. service line before the main pressure reducing valve. The tool air
piping shall contain the following:
(1)
Shutoff valve (V1),
(2)
Pneumatic tool filter (F2),
(3)
90-psig (620.53 kPa) pneumatic tool air and pressure
regulator (V15),
(4)
Pneumatic tool lubricator (M3), and
(5) Two pneumatic tool quick-connectors mounted externally
on the end of the enclosure (M-1).
b) Provide the following items and mount the items on the
exterior side of the enclosure (see Figures 14, 15, and 16 for mechanical
system details):
(1)
Main shutoff valve operating handle (V1),
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