Attachment 14
A14.2.20.1.7.1.2. Aprons TAAS security Sensor mounts will be allowed on aprons
provided minimum taxilane wingtip clearance (as described in Chapter 6 for Peripheral,
Through, and Interior taxilanes) is maintained. There is no height restriction for the
supports up to 3 meters (10-feet) tall.
A14.2.20.1.7.3. Runway/Overrun -- Closest distance from runway and overrun edge
will be 100-feet, closest distance to threshold within the CZ will be 1,000-feet. No
penetrations of the Approach/Departure Clearance Surface will be allowed.
A14.2.20.2. Maintenance Facilities:
A14.2.20.2.1. Jet Blast Deflectors (Non-Frangible). Jet blast deflectors are installed where
continual jet engine run-up interferes with the parking or taxiing of aircraft, the movement of
vehicles, the activities of maintenance personnel, or where it causes the erosion of pavement
shoulders. To provide maximum efficiency, jet blast deflectors must be positioned at their
optimum distance from the aircraft. They should be located to maintain nominal aircraft
taxiing clearance distance. When these clearances cannot be provided, safety procedures in AFI
11-218 for taxiing aircraft near obstacles must be followed.
A14.2.20.2.2. Floodlights (Non-Frangible). Floodlights illuminate aprons, alert stubs,
specialized pads and other paved areas used for aircraft maintenance, loading/unloading, area
security, and other reasons. Floodlights are exempt from apron clearance distance criteria.
Ensure minimum aircraft wingtip clearance requirements are provided as discussed in Chapter
6. They are not, however, exempt from the vertical restriction imposed by the 7:1 transitional
slope. Any deviation from this restriction must be waived, as discussed in Attachment 2.
A14.2.20.2.3. Fire Hydrants (Non-Frangible). Fire hydrants may be installed within the apron
clearance distances discussed in Chapter 6, provided the height is no more than 762 millimeters
[30 inches] above the ground. For additional siting criteria and other information on the
location of fire hydrants, see MIL-HDBK-1008C.
A14.2.20.2.4. Explosives Safety Barricades (Non-Frangible). When barricades are an element
in an aircraft alert complex, they are exempt from apron clearance distance criteria in Chapter
6. For information on explosives safety standards, see AFMAN 91-201.
A14.2.20.2.5. Ground Support Equipment (Mobile) (Non-Frangible). Mobile ground support
equipment is exempt from apron clearance distance criteria in Chapter 6. Examples of ground
support equipment exempt under this category are: aerospace ground equipment, electrical
carts, forklifts, tow bar trailers, fire extinguisher carts, material handling equipment, flightline
maintenance stands, stair trucks, and portable floodlights. Similar equipment may be included
in this category. When such equipment is not in use, it must be removed from the aircraft
parking area and stored in areas that do not violate aircraft clearance requirements for normal
operating routes (marked taxilanes or taxiways), or other imaginary surfaces. For the purpose
of this manual, equipment in use is defined as support equipment in place not more than three
hours before aircraft arrival or three hours after aircraft departure.
A14.2.20.2.6. Flightline Vehicles (Non-Frangible). Flight line vehicles, such as pickup trucks
passenger buses, and vans, are exempt from apron clearance criteria. When not required, these
vehicles are relocated away from the vicinity of the parked aircraft.
A14.2.20.2.7. Ground Support Equipment (Stationary) (Non-Frangible). Stationary ground
support equipment and the associated safety and security components are exempt from apron
and taxiway clearance distance criteria in Chapter 6. Examples of exempt stationary ground
A14-10
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