2-1.3 VIBRATION FREQUENCY IDENTIFIED AS 225 RPM (1 /REV)

HIGH FREQUENCY VIBRATION ISOLATION PROCEDURE (Continued)

VIBRATION FREQUENCY IDENTIFIED AS 225 RPM (1 /REV) (Continued)

TM-55-1520-240-T-1 CH-47D Heilcopter Manual
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TM 55-1520-240-T 2-1.3 VIBRATION FREQUENCY IDENTIFIED AS 225 RPM (1 /REV) 2-1.3 FAULT ISOLATION PROCEDURE INITIAL SETUP Applicable Configurations: All Tools: Aircraft Mechanic’s Tool Kit, NSN 5180-00-323-4692 Sharp PC 1500A Track and Balance Computer Vibrex Model 177M6A or 177M7A Vibrex Accessory Set Materials: None Personnel Required: Medium Helicopter Repairer (2) Army Rotary Wing Aviator (2) Technical Inspector References: TM 55-1520-240-23 TM 55-1520-240-10 Equipment Condition: TM 55-1520-240-23: Battery Connected Electrical Power On Hydraulic Power On Helicopter Prepared for In-Flight Blade Balancing Tracking Targets Installed Visual Check Performed 2-4.8 Change 5 GO TO NEXT PAGE

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