TO 00-25-172 - Robins Air Force Base

TO 00-25-172
c. Cargo aircraft loaded with transportation-configured
explosives may be refueled at aircraft explosives cargo
parking areas, commonly called hot cargo pads.
d. Fighter or bomber nonnuclear explosives-loaded aircraft
may be hot refueled when authorized in Table 6-1
and the munitions aboard are SAFED according to the
specific aircraft -33-1-2 munitions loading manual.
4.13 FUEL SYSTEM MAINTENANCE FACILITIES.
Aircraft fuel servicing is permitted in fuel system maintenance
facilities (fuel cell) complying with the facility requirements
of TO 1-1-3. During fuel servicing, the facility
must have a forced air ventilation system in operation, use a
means of collecting fuel vapors from the aircraft vent outlets,
or must have its doors open to provide adequate ventilation.
Other aircraft can be present in a fuel call facility
while an aircraft is being refueled, but only one aircraft can
be refueled at a time.
4.14 FUEL SERVICING IN HANGARS AND OTHER
FACILITIES.
NOTE
Aircraft can undergo fuel servicing in sun shades
and sun shelters (e.g., Big Top, Agate, etc.) if the
shades/shelters have no electrical provisions/
equipment. If the shades/shelters have electrical
provisions/equipment, they must meet National
Electrical Code (NEC) Class I, Division 2 requirements
or be completely de-energized prior to fuel
servicing. (Centralized Aircraft Support Equipment
may remain energized, but electrical switches
must not be operated.) A separate SSEA is not
required for sun shades and sun shelters.
Aircraft will not be fueled or defueled inside any hangar
other than those facilities approved through a System Safety
Engineering Analysis (SSEA). Shelters, FTRs and hush
houses are addressed separately in this TO. A “universal
SSEA” conducted by AFMC/SES in August 1996 determined
that aircraft fuel servicing operations can be conducted in
hangars and similar facilities as long as the facilities have
the following provisions in good working order:
a. The facility is separated from other maintenance facilities
as a separate building, or has masonry separating
walls of not less than one hour of fire resistive construction
and automatic opening protection of not less
than 45 minutes.
b. The facility has a ventilation system capable of removing
accumulations of fuel vapors during normal servicing.
Personnel must not be exposed to fuel vapors beyond
maximum exposure limits. (There are no
established ventilation requirements from a fuel vapor
ignition standpoint.) Individual suction devices located
at the aircraft fuel vent outlets are desired, but are not
required.
c. The facility must have a drainage system capable of
handling and removing a fuel spill of at least 300 gallons.
d. The facility must have an installed automatic foamwater
fire suppression system.
e. The facility electrical provisions must be designed for
Class I, Division 1 (Zone 1), hazardous locations below
floor/grade level. If not the case, then the electrical
provisions must be completely de-energized during
fuel servicing.
f. Electrical equipment in the aircraft servicing area above
the floor up to the height of the highest hangar door
must satisfy NEC criteria for Class I, Division 2 locations.
If not the case, then the electrical provisions must
be completely de-energized during fuel servicing.
g. A separate tabletop SSEA is required for servicing with
low flash point fuels (JP-4, JET B, AVGAS, and MO-
GAS). As a minimum, Class I, Division 2 (Zone 2),
electrical provisions will be required from the floor/
grade level up to the facility ceiling lights.
h. Other aircraft cannot be inside the facility at the same
time. Support equipment will not be powered unless it
is essential for the fuel servicing operation. Nonessential
personnel will be removed from the facility.
i. The fuel source (e.g., truck, hose cart) can be inside
the facility but must use a deadman control unit. The
aircraft fuel vent outlets must be continuously visually
monitored during fuel servicing.
j. There are no additional restrictions for munitionsloaded
aircraft.
NOTE
If a facility does not meet all of the above requirements,
fuel servicing cannot be conducted unless a
separate SSEA is accomplished for that facility.
Table 4-2 lists specific hangars and other facilities
that have been approved for aircraft fuel servicing
via individual SSEAs.
4-13