TO 00-25-172 - Robins Air Force Base

TO 00-25-172
4.11 AIRCRAFT FUEL SERVICING IN TYPE A/F
37T10/11 HUSH HOUSES (ENCLOSED AIRCRAFT/
ENGINE NOISE SUPPRESSOR SYSTEMS).
NOTE
• Aircraft will be fully fuel serviced before being
placed inside hush houses for engine test runs.
• These procedures are provided ONLY to be
used on an exception basis, i.e., only after a
fully fuel serviced aircraft has undergone engine
test runs and was not able to be completed
because of fuel depletion. These procedures are
provided only for the purpose of alleviating the
necessity to tow an aircraft 50 feet outside a
hush house to accomplish fuel servicing before
continuing the engine test runs. These procedures
are NEVER to be used just for convenience’s
sake.
• Fuel servicing vehicles may be positioned outside
or inside of hush houses for fuel servicing
operations. R-9 and R-11 fuel servicing vehicles
shall only be backed into hush houses
using a spotter and a pre-positioned chock.
Place the fuel servicing vehicle parallel to the
aircraft fuselage at approximately the one to
two o’clock or the ten to eleven o’clock position
from the aircraft’s cockpit (depending upon
the location of the aircraft refueling receptacle).
In the event fuel servicing of an aircraft is required while
located in a Type A/F 37T10 or 11 Hush House, the following
procedures will apply:
a. All other operations in hush house will cease during
the fuel servicing operation.
b. All powered vehicles or equipment not involved in the
servicing operation shall be shut down and parked in
an area that will not obstruct the operation. When
powered support equipment is required for the fuel
servicing operations, the equipment should be positioned
outside the shelter when possible. If the equipment
cannot be positioned outside, it may be positioned
inside. All support equipment normally used in hush
house can remain in place provided electrical power is
turned “OFF” and secured.
c. All personnel doors located on control room side of
hush house will be closed. All other doors will be
“FULLY OPEN” during fuel servicing operations.
d. All floor drains will be unobstructed.
e. Standby water flushing hoses will be readily available
and maintained in good serviceable condition.
f. All electrical power will be turned “OFF” and secured
to prevent activation during fuel servicing operations
in hush houses manufactured by the following companies
and having the following serial numbers:
(1) Aero Systems Engineering - Serial Numbers 001
through 023.
(2) Industrial Acoustics Corporation - Serial Numbers
201 through 207.
(3) Cullum Detuners Limited - Serial Numbers 301
through 313.
g. The following hush houses were designed and installed
with all electrical conduit and equipment in the interior
of the hush house test bay and equipment room to meet
the requirements of the National Electrical Code for
Class I, Division 1 (Zone 1) hazardous locations up to
a height of 4 feet and Class I, Division 2 (Zone 2)
hazardous locations from 4 feet up to a height of 12
feet. Electrical power does not need to be turned “OFF”
during fuel servicing operations in these following
hush houses, if being maintained according to the design
specifications as listed above when manufactured
by the following companies and having the following
serial numbers:
(1) Environmental Elements Corporation - Serial
Numbers 101 through 199 and 501 and 502.
(2) Industrial Acoustics Corporation - Serial Numbers
208 through 299.
4.12 FUEL SERVICING EXPLOSIVES-LOADED
AIRCRAFT.
An aircraft is considered “explosives-loaded” when munitions
or explosives are carried either internally or externally
(including nuclear weapons). The term does not include explosive
components of aircrew escape systems or pyrotechnics
installed in survival and rescue kits and other components
identified in TO 11A-1-33.
a. During initial generation an aircraft should normally
be refueled before being loaded with either nuclear or
nonnuclear munitions to reduce the severity of a mishap.
b. Fighter or bomber explosives-loaded aircraft returning
from a mission may be refueled at locations meeting
acceptable quantity-distance (Q-D) criteria when the
munitions aboard are SAFED according to the specific
aircraft -33-1-2 munitions loading manual. This also
applies to cargo aircraft with explosive countermeasures
systems (chaff and flare dispensers).
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