airport terminal services, incats.pelesys.com/webcbt/upload/groundpowermodule.pdf · airport...
TRANSCRIPT
AIRPORT TERMINAL SERVICES, Inc
GPU- GROUND POWER UNIT
&
JETWAY POWER
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Introduction
This training module is designed to familiarize you with the operational aspects of a GPU. You are responsible for reading and understanding
the content contained within this module. If there is any information
that you do not understand, please consult your trainer, supervisor or manager for assistance. Upon completion of this module, if you
successfully:
1. Complete module test with a score of 85% or better AND
2. Demonstrate to your trainer, supervisor or manager the safe operation of the GPU Unit by performing 3 check rides AND
3. Have your training file signed off by your trainer, supervisor or
manager and yourself AND
4. Have obtained an airport ID
You will then be qualified and permitted to operate a GPU.
PRE-OPERATIONAL CHECKS
Each day the vital fluids inspection should be performed on the GPU. Each station has a copy of a pre operational checklist that covers both
mechanical and vital fluids inspection.
The following areas should be given attention BEFORE operating the GPU by completing a walk around inspection. A supervisor should be
notified immediately if any discrepancies are noted.
� Hitch lock/ key � Parking brake working properly
� Two wheel chocks
� Corner Bumpers � Condition of GPU cord/head
� Fire extinguisher **( EXCLUDES DELTA AIRLINES OWNED UNITS)
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15ft Mark on GPU CABLE
The 15ft mark on the GPU cable stands as
a reminder to keep the unit positioned so that it is no closer than 10ft from the
aircraft. Due to the height of most aircraft receptacles, when plugged in the mark and
GPU will be outside of the 10ft foot buffer zone
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Transport
When towing most GPU’s its important to remember that due to the weight of the unit, braking distances will increase. Additionally the
cable is located on one side so pre-planning your route to the aircraft may be necessary. (You must be signed off on tug operation if you
will be driving a tug)
Positioning
After completing your pre-use inspection and determined the GPU is in
good working condition it may be connected to a tug for positioning at the aircraft. When positioning the GPU to the aircraft, a brake stop at
50ft and 10ft from the aircraft must be completed
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If the unit must be positioned closer than 10ft from the aircraft, the
unit must be disconnected from the tug and hand pushed into position.
Once positioned at aircraft, the
parking brake on the unit must be set and wheel chocks placed
The unit must then be disconnected from the tug
Finally the hitch lock must be installed to prevent an aircraft
pull away damage from occurring!!
Note: Most GPU’s are diesel
powered and should be turned on to warm up prior to use on an aircraft providing power
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Extend the cable to the GPU panel for connection.
NOTE: If the tow bar is connected to the aircraft and the
aircraft GPU panel is on the opposite side as the GPU. The
cable must be placed underneath the tow bar to
prevent it from catching on any portion of the top of the
bar
Plug the GPU cable into the
aircraft GPU receptacle making
sure the pins are lined up correctly. There are 6 pins, 2
small and 4 large. When the GPU cord is plugged in electrical
power can be turned on by depressing the “Closed/Open”
contact switch*.
Note*: GPU units vary your trainer will inform you of any
specific procedures.
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After verifying that the aircraft is receiving electrical power from the
GPU, other tasks may be completed at the aircraft. If the unit will be used for extended periods of time at the aircraft ensure that fuel levels
remain sufficient.
GPU Removal
If the aircraft is using electrical power from the GPU it is important not to disconnect the power unless the aircraft is an RON or the captain
has given permission. Typically on turn flights the GPU will be utilized until the last 5-10min, when the APU will be started. Pre-maturely
disconnecting the unit prior to APU start up can cause delays as the
flight crew may need to reprogram flight computers that suddenly lost power. Always get permission first.
First verify that you may disconnect the GPU cable from
the aircraft.
Once verified the electrical power should be halted by
depressing the “Closed/Open” contact switch*.
Note*: GPU units vary your
trainer will inform you of any specific disconnect procedures.
Always remove the electrical source prior to removing GPU cables from aircraft.
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Once the cable is disconnected from
the aircraft the key on the head of the cable must be used to unlock the
hitch lock.
Always stow the cable in the designed stow box to prevent
damage to the cable
The GPU may then be connected to a tug for transport
The emergency brake disengaged
and chocks removed/stowed.
Note: If the unit will not be used right away, it should be left at idle to
cool down before being completely turned off
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JET WAY MOUNTED POWER
Some gates offer aircraft electrical power via a jetway mounted unit.
These units are attached typically underneath the jet ways with cables carried either in a stow box or via a winch system. Most units with a
winch system also have a safety switch mounted in the winch that will allow power to the jet way for movement only if the winch is raised to
the top of the jet way.
The jetway power cables should not be lowered prior to aircraft
arrival due to the risk of employees tripping and damage to the cords!!
Winch
Safety switch
Cable tether
Ground power cables
After the aircraft has arrived
and the jetway is positioned at the aircraft, the cables may be lowered
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On most jetway mounted systems, controls are basic. An up and down switch to raise
or lower the winch, and a “Start/Stop” switch for turning on the electrical power
The cable is first lowered to a
height which the user can access the cable tether. Disconnecting
the cables from the winch system
Once disconnected, the cable is
plugged into the aircraft and then the start or electrical power switch
is turned on. After ensuring the aircraft has electrical power, the
winch cable must be raised to the
top. NOTE: If tow bar is connected
to aircraft and the cable must pass tow bar to be connected,
cable must be placed under the tow bar
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1.
Prior to disconnecting the jet way
power, you must verify with the captain that it is ok. Failure to do
this can result in loss of power to the aircraft and computers
Once verified, the electrical power to
the cord must be stopped or turned off and the winch cable/tether lowered
The jetway power cord may then be
reattached to the cable tether and the winch raised to the top. Make sure
the cable does not catch on the
aircraft or pitot tubes when being raised.