MIL-HDBK 1028/6A
Section 8:
HANGAR SERVICE POINTS
8.1
Hangar Service Points. The function of the service points is to
dispense compressed air, preconditioned air, and electrical services for
aircraft maintenance in the hangar space. Service points shall be located
near the center of each two aircraft spaces and shall provide service for
two aircraft. (Service points shall be installed on hangar fire wall at a
minimum of 18 in. (457 mm) above hangar finished floor. Conduits entering
this area from below are to have seal fittings. For details of enclosure
and equipment installations see Figures 9, 11, 12, 13, and 14. If fire
lanes are not provided along fire wall, markings shall be provided on the
hangar floor to define a 5 ft (1.5 m) minimum radius about the service
points. Aircraft extremities shall not extend into the marked zones.
Signs warning of hazardous zones shall be furnished and installed above
each service point. Signs shall read: "WARNING - KEEP AIRCRAFT ENGINE AND
FUEL TANK AREAS OUTSIDE OF MARKED ZONES." Installation in the high bay
area shall be in accordance with the requirements of the NFPA 70.
8.1.1
Construction. Hangar service points shall have wall-mounted,
formed-sheet aluminum enclosures for electrical equipment. The enclosure
shall have hinged and gasketed access doors. Compressed-air apparatus
shall be mounted on sheet steel structural support board attached to a
steel channel wall bracket.
8.1.2
Compressed Air Equipment Components. Compressed-air
piping and
appurtenances shall be wall mounted adjacent to the electrical
apparatus at
each service point. Each service point shall be provided with
a 1 in.
(25.4 mm) air supply line from the 2 in. (51 mm) hangar main.
Each service
point shall contain the following:
a)
Two 1/2 in. (38 mm) needle valve shutoffs,
b)
Two pneumatic tool filters,
c)
Two 90 psig (620.52 kPa) pressure regulators,
d)
Two pneumatic tool lubricators,
e)
Four pneumatic tool quick-connectors, and
f) Two wall-mounted hose racks (tool air hoses are Government-
furnished equipment).
8.1.3
Preconditioned Air Equipment Components. Preconditioned air
service drop from secondary coils shall have 75 ft (22.86 m) length of
8 in. (203.2 mm) flexible duct looped over wall-mounted rack. Each service
point shall have the following:
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