TM 11-6660-200-14
5-26.
TOOLS:
Calibrator weight, 3.1-gram
Cellulose tape (item 6, app E)
1.
Use a piece of cellulose (cellophane) tape (1) and attach a 3.1-gram calibrator weight (2) to tip of one impeller
blade.
2.
Turn weighted impeller blade to left until it is approximately 45 degrees from vertical, then release it. Weighted
impeller blade must fall to vertical position.
3.
Turn weighted impeller blade to right until it is approximately 45 degrees from vertical, then release it. Weighted
impeller blade must fall to vertical position.
NOTE
To ensure an accurate test, steps 1, 2, and 3 must be performed on all three impeller blades. If requirements are
not met, refer to higher category of maintenance.
5-35
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