PS Magazine - TB 43-PS-601

PS, The Preventative Maintenance Monthly

ISSUE 601

DECEMBER 2002
PS Magazine - TB 43-PS-601 - Page 21 of 33
PS 601
DEC 02
38
UH-60…
Dear Rotor,
Our mechanics have a tough time and spend
hours trying to troubleshoot, test and inspect
the Blackhawk’s engine control quadrant switches
using a multimeter, a flashlight and a mirror. It
takes three hands to do it.
The J105 and J106 connectors of the
quadrants are mounted in the upper console of
the cockpit in a tight space. That makes it
difficult to see the pin letters without the
aid of the mirror and a flashlight.
The procedure in TM 1-1520-237-23-3,
Paras 4-2-8 and 4-2-9, requires continuity,
resistance and voltage checks of all pins and
micro-switches when we suspect an engine
start problem or an ignition system problem.
We solved that problem with a new test box
that can aid in and speed up the testing and
troubleshooting of the engine control quadrant
switches. It now takes 5 minutes, and doesn’t
require the aid of a mirror and flashlight to check
the switches.
Any AVIM shop can build the test box. Here
are the materials for the control quadrant
test box:
Box, electrical
Socket light (DS1-DS8)
Lens light (red) DS7 & DS8
Lens light (green) DS5 & DS6
Lens light (blue) DS3 & DS4
Lens light (amber) DS1 & DS2
Lamp Incandescent
Test jack (red) K, S, G, & N
Test jack (yellow) J, T, & H
Test jack (blue) M
Test jack (black) B
Grommet
Wire Elec (20 gauge)
100ft Terminal lug
Insulation sleeving
7ft Connector plug (J105 & J106)
Connector plug (P105 & P106)
Connector backshell
Terminal splice
Screw (for ground lug wire)
Nut (for ground lug wire)
Washer (for ground lug wire)
Cable ties
Engine Control Box Parts List
Item name
5935-01-10
9
-
7541
NSN
1
8
2
2
2
2
8
8
6
2
2
2
100 ft
1
7 ft
2
2
4
18
1
1
1
AR
Qty
put away your
flashlights and
mirrors! use
the test box
instead!
here’s
another good
suggestion
from the field!
You’re in for a treat!
this new test box will
make troubleshooting
your engine control
quadrants easier!
you mean no
more flash-
lights and
mirrors?
…and no more hours
of trying to figure
out what’s wrong
with the quadrants?!
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