TM 55-1520-240-23-8
10-33
ISOLATING CONTAMINATION
10-33
INITIAL SETUP
Applicable Configurations:
Without 74
Tools:
As Required
Materials:
As Required
Personnel Required:
Medium Helicopter Repairer (2)
Inspector
References:
Task 1-37
Task 4-17
Task 4-18
Task 10-36
Task 10-37
Task 10-51
Task 10-52
Task 10-53
Task 10-54
Task 10-69
Task 10-70
Task 10-79
Task 10-80
TM 55-2840-254-23
Equipment Condition:
Electrical Power On
Battery Connected (Task 1-39)
Helicopter Grounded (Task 1-29)
Engine Work Platform Open (Task 2-2)
Engine Access Covers Open (Task 4-49)
NOTE
Procedure is same to isolate
contamination in the No. 1 (left) or No.
2 (right) fuel system. No. 1 system is
shown here.
1.
Remove static fuel filter element (1), fuel control
elements (2 and 3) and inlet fuel element (4) (TM
55-2840-254-23).
2.
Inspect filter elements (1, 2, 3 and 4). For
contamination as follows:
a.
If contamination is dirt, sand or grit with no
metal particles or chips, flush airframe fuel
system (Task 10-36) and engine fuel system
(Task 10-37).
b.
If metal contamination is found in static fuel
filter element (1), perform steps 3 thru 25.
c.
If metal is found in fuel control filters (2 or 3)
or inline fuel filter (4), perform step 27.
3.
Install filters (1, 2, 3 and 4).
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