2-1.2.1 LOW FREQUENCY VIBRATION ISOLATION PROCEDURE

2-1.2 VIBRATION ANALYSIS VISUAL CHECK (Continued)

TABLE 2-1.2.1A NORMAL VIBRATION LEVELS AT HOVER

TM-55-1520-240-T-1 CH-47D Heilcopter Manual
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TM 55-1520-240-T 2-1.2.1 LOW FREQUENCY VIBRATION ISOLATION PROCEDURE 2-1.2.1 INITIAL SETUP References: Applicable Configurations: All TM 55-1520-240-23 TM 55-1520-240-10 Tools: Equipment Condition: Aircraft Mechanic’s Tool Kit, TM 55-1520-240-23: NSN 5180-00-323-4692 Battery Connected Vibrex Model 177M6A or 177M7A Electrical Power On Vibrex Accessory Set Hydraulic Power On Helicopter Prepared for In-Flight Blade Balancing Materials: Two 1-Inch Square Steel Blocks (See Below) Visual Check Performed Personnel Required: Medium Helicopter Repairer (2) Army Rotary Wing Aviator (2) Technical Inspector GO TO NEXT PAGE 2-4.2 Change 5

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