Attachment 3
Table A3.1. Facility Class 1: Operational and Training Facilities, Category Group 11:
Airfields Pavement, General
Category
Item and Allowance
Code
11370
Aircraft Washing Apron, Surfaced
A rigid pavement area for washing and cleaning aircraft. It normally includes
electrical and water service, drainage, and waste water collection equipment. From
an operational point of view, an apron includes the prepared surface, stabilized
shoulders, lighting and lateral clearance zones. For inventory purposes, only the
prepared surface is included.
A washing apron is authorized for each aircraft maintenance hangar. Washing aprons
will be sized and dimensioned according to the number and type of aircraft to be
washed, local environmental conditions (i.e., soil and climate), and scheduling. See
paragraph 6.14.2.
The wash apron will be provided with 110 volt electrical service, 25 mm [1 in] water
service and compressed air. The wash apron will be provided with drainage facilities
to include a facility for wash-waste treatment, including at least a 11,400 L [3,000
gal] capacity holding tank. The tank should be sized to the extent required for
effluent to be suitable for discharge into a sanitary system. A collection area for
P.O.L. waste and spillage should be provided, when required, in conjunction with the
wash apron.
11371
Aircraft Washing Apron, Unsurfaced
An unpaved, prepared surface for washing and cleaning aircraft. It normally includes
electrical and water service, drainage, and waste water collection equipment. From
an operational point of view, an apron includes the prepared surface, stabilized
shoulders, lighting and lateral clearance zones. For inventory purposes, only the
prepared surface is included.
11380
Aircraft Loading Apron, Surfaced
A paved surface for loading cargo aircraft; loading personnel for medical evacuation,
and transient aircraft operations; or providing an apron area for arming and disarming
aircraft weapons, loading and unloading ammunition, special handling or
decontamination of chemical, biological, radiological (CBR) warfare items, and for
special security operations.
An apron area in support of the airfield operations building, not to exceed 5,850 m2
[7,000 yd2,] may be authorized for purposes of handling special loading and
unloading of personnel, for medical evacuation flights and for transient aircraft
operations. (See Category 11382 for aprons requiring safety clearances and/or
security facilities).
A3-9
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