PS Magazine - TB 43-PS-601

PS, The Preventative Maintenance Monthly

ISSUE 601

DECEMBER 2002
PS Magazine - TB 43-PS-601 - Page 24 of 33
PS 601
44
Table No. 1. #1 abort light does not come on when external power applied.
1. Check #1 abort bulb in test box.
Step 1. If bulb is good, go to 2.
Step 2. If bulb is not good, replace bulb, go to 4.
2. Check
#1 abort switch for proper adjustment (PARA 4-4-24).
Step 1. If #1 abort switch properly adjusted, go to 3.
Step 2. If #1 abort switch not properly adjusted, do (PARA 4-4-24), go to 4.
3. Check for 28 VDC at #1 Quad test point K and ground.
Step 1. If voltage as specified, do (PARA 4-2-9), go to 4.
Step 2. If voltage not as specified, troubleshoot aircraft wiring between J105
K
and
CB312, go to 4.
4. Procedure completed.
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Table No. 2. #2 abort light does not come on when external power applied.
1. Check #2 abort bulb in test box.
Step 1. If bulb good, go to 2.
Step 2. If bulb is not good, replace bulb, go to 4.
2. Check #2 abort switch for proper adjustment (PARA 4-4-24).
Step 1. If #2 abort switch properly adjusted, go to 3.
Step 2. If #2 abort switch not properly adjusted, do (PARA 4-4-24), go to 4.
3. Check for 28 VDC at #2 Quad test point K and ground.
Step 1. If voltage as specified, do (PARA 4-2-9), go to 4.
Step 2. If voltage not as specified, troubleshoot aircraft wiring between J106 K and
CB236, go to 4.
4. Procedure Completed.
—————––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––
Table No. 3. Start light does not come on when start button depressed.
1. If checking #1 Quad go to 2. If checking #2 Quad go to 5.
2. Check #1 start bulb in test box.
Step 1. If #1 start bulb good, go to 3.
Step 3. If #1 start bulb is not good, replace bulb, go to 8.
3. Check #1 start switch for proper adjustment (PARA 4-4-23).
Step 1. If #1 start switch properly adjusted, go to 4.
Step 2. If #1 start switch not properly adjusted, do (PARA 4-4-23), go to 8.
4. Check for 28 VDC at #1 Quad test point G and ground.
Step 1. If voltage as specified, do (PARA 4-2-9), go to 8.
Step 2. If voltage not as specified, troubleshoot aircraft wiring between J105 G and
CB312, go to 8.
5. Check #2 start bulb in test box.
Step 1. If #2 start bulb is good, go to 6.
Step 2. If #2 start bulb is not good, replace bulb, go to 8.
6. Check #2 start switch for proper adjustment (PARA 4-4-23).
Step 1. If #2 start switch properly adjusted, go to 7.
Step 2. If #2 start switch not properly adjusted, do (PARA 4-4-23), go to 8.
7. Check for 28 VDC at #2 Quad test point G and ground.
Step 1. If voltage as specified, do (PARA 4-2-9), go to 8.
Step 2. If voltage not as specified, troubleshoot aircraft wiring between J106 G and
CB236, go to 8.
8. Procedure Completed.
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Table No. 4. Override light does not come on when override button depressed.
1. If checking #1 Quad, go to 2. If checking #2 Quad, go to 5.
2. Check #1 override bulb in test box.
Step 1. If #1 override bulb good, go to 3.
Step 2. If #1 override bulb is not good, replace bulb, go to 8.
3. Check #1 override switch for proper adjustment (PARA 4-4-25).
Step 1. If #1 override switch properly adjusted, go to 4.
Step 2. If #1 override switch not properly adjusted, do (PARA 4-4-25), go to 8.
4. Disconnect test box connector J105 from aircraft connector P105 and check continuity
between #1 Quad test points T and S while depressing override button.
Step 1. If continuity is present, troubleshoot aircraft wiring between J105 T and J105 S
through left hand relay panel, go to 8.
Step 2. If continuity is not present, do (PARA 4-2-9), go to 8.
5. Check #2 override bulb in test box.
Step 1. If #2 override bulb good, go to 6.
Step 2. If #2 override bulb is not good, replace bulb, go to 8.
6. Check #2 override switch for proper adjustment (PARA 4-4-25).
Step 1. If #2 override switch properly adjusted, go to 7.
Step 2. If #2 override switch not properly adjusted, do (PARA 4-4-25), go to 8.
7. Disconnect test box connector J106 from aircraft connector P106 and check continuity
between #2 Quad test points T and S while depressing override button.
Step 1. If continuity is present, troubleshoot aircraft wiring between J106 T and J106 S
through right hand relay panel, go to 8.
Step 2. If continuity is not present, do (PARA 4-2-9), go to 8.
8. Procedure Completed.
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Table No. 5. Abort light does not go out when PCL handle is pulled down.
1. If checking #1 abort, go to 2. If checking #2 abort, go to 4.
2. Check #1 abort switch for proper adjustment (PARA 4-4-24).
Step 1. If #1 abort switch properly adjusted, go to 3.
Step 2. If #1 abort switch not properly adjusted, do (PARA 4-4-24), go to 5.
3. Do PARA 4-2-9, go to 5.
4. Check #2 abort switch for proper adjustment (PARA 4-4-24).
Step 1. If #2 abort switch properly adjusted, go to 3.
Step 2. If #2 abort switch not properly adjusted, do (PARA 4-4-24), go to 5.
5. Procedure Completed.
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Table No. 6. Fire T handle light does not come on
when handle pulled away from forward detent.
1. If checking #1 fire T handle, go to 2. If checking #2 fire T handle, go to 5.
2. Check #1 fire T handle bulb in test box.
Step 1. If #1 fire T handle bulb good, go to 3.
Step 2. If #1 fire T handle bulb is not good, replace bulb, go to 8.
3. Check #1 fire T handle switch for proper adjustment (PARA 4-5-17).
Step 1. If #1 fire T handle switch properly adjusted, go to 4.
Step 2. If #1 abort switch not properly adjusted, do (PARA 4-5-17), go to 8.
4. Check for 28 VDC at #1 Quad test point N and ground.
Step 1. If voltage is as specified, do PARA 4-2-9, go to 8.
Step 2. If voltage not as specified, troubleshoot aircraft wiring between J105 N and CB1,
go to 8.
5. Check #2 fire T handle bulb in test box.
Step 1. If #2 fire T handle bulb good, go to 6.
Step 2. If #2 fire T handle bulb is not good, replace bulb, go to 8.
6. Check #2 fire T handle switch for proper adjustment (PARA 4-5-17).
Step 2. If #2 fire T handle switch properly adjusted, go to 4.
Step 2. If #2 abort switch not properly adjusted, do (PARA 4-5-17
)
,
go to 8.
7. Check for 28 VDC at #2 Quad test point N and ground.
Step 1. If voltage is as specified, do PARA 4-2-9, go to 8.
Step 2. If voltage not as specified
troubleshoot aircraft wiring between J106 N and CB253, go to 8.
8. Procedure Completed.
Tables for Engine Test Control Procedure
Ethan Allen
AASF #3
TN Army National Guard
From the desk
of the
Editor
Great idea! The
new test box will
shorten the troubling
troubleshooting.
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