2-1.4 VIBRATION FREQUENCY IDENTIFIED AS 675 CYCLES/MIN (3/REV)

TABLE 2-1.3. NORMAL ONE/REV VIBRATION LEVELS FWD AND AFT ROTOR A T 225 RPM

VIBRATION FREQUENCY IDENTIFIED AS 675 CYCLES/MIN (3/REV) (Continued) - TM-55-1520-240-T-1_159

TM-55-1520-240-T-1 CH-47D Heilcopter Manual
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TM 55-1520-240-T 2-1.4 VIBRATION FREQUENCY IDENTIFIED AS 675 CYCLES/MIN (3/REV) 2-1.4 FAULT ISOLATION PROCEDURE INITIAL SETUP Applicable Configurations: All Tools: Aircraft Mechanic’s Tool Kit, NSN 5180-00-323-4692 Chadwick Helmuth Model 192 Spectrum Analyzer with Vib Pickups 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 Visual Check Performed Materials: 90° Bracket for Installation of Vib Pickup to Nose Absorber Personnel Required: Medium Helicopter Repairer Army Rotary Wing Aviator (2) Technical Inspector 2-8 Change 5 GO TO NEXT PAGE

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