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Page Title:
TSUM - 3-007 A-Frame Raise (39) Part 1 |
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 TM 5-5420-279-23
A-Fram e
will not raise
For the A-Fram e to raise the following conditions
m ust be satisfied:-
* Neutral gear selected
* Parking brake applied
* Tail Lift Pendant connected & powered
* Chest pack connected and powered
* 4-Position Switch at position 4
* Ensure E-STOP RESET satisfactory
* A-Fram e unfolded
* A-Fram e rotated
* Slide Fram e extended
* Relax Pins withdrawn & Lim it Switches closed
* Chest Pack in A-Fram e Raise m ode
* RH Joystick m oved forward from centre
Power down & replace
Are
Perform
defective Mim ic Panel.
solenoids
lam p test on
No
No
To replace Electrical
PV1b & SV3 LEDs lit
Mim ic Panel.
Enclosure see
on Mim ic
Are all lam ps
m aintenance procedure
Panel?
lit?
5-049
Yes
Yes
Is
LED lit on
Disconnect connector
valve connector
Insert probes of DMM
No
from solenoid SV3.
SV3 on the Launch
into sockets 1 & 2 of
See m aint procedure
Fram e Articulator
connector
5-141
Manifold?
Yes
Disconnect connector
from solenoid SV3.
Replace solenoid
See m aint procedure
harness if connector
Is 24V
Yes
5-141. Connect DMM
LED not lit. See
solenoid supply
across solenoid coil pins.
m aintenance procedure
present?
See resistance check in
5-139
m aintenance procedure
5-124
No
Replace faulty harness
Power down & check
or Launch Fram e Enclosure
harness continuity from
using the following
solenoid SV3 to Launch
Go to
m aintenance procedures:-
Fram e Enclosure using the
Part 2
Harness 5-139
cable routing tables in
Launch Fram e Enclosure
section 3.6 of Chapter 3
5-049
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