TM 1-1520-238-MTF
Change 3
2-70
PROCEDURE
TROUBLESHOOTING
REFERENCE
HOVER CHECKS (CONT)
*2. Instrument checks – Verify proper
function and PPC data correlation.
*3. Nav System – Initialize.
*4. Hover maneuvering checks:
a. Perform 90 pedal turns – Verify
aircraft controllability, response,
instrument and symbology
functioning.
b. Perform forward, lateral and
rearward hovering flight – Verify
aircraft controllability, response,
instrument and symbology
functioning.
*5. DASE/HAS system checks:
a. Note aircraft stability for reference.
b. TRIM FEEL – Adjust as required.
c. ATTD/HOVER HOLD switch – On.
Relax control pressures and note
any tendency of aircraft attitude to
change from trimmed condition.
Without retrimming, perform
smooth 90 pedal turns. Relax
control pressures and verify HAS
holds newly selected heading and
attitude.
d. Without moving pedals, increase
collective slightly. Observe that
helicopter maintains original
heading 5. Return to stabilized
hover.
