Pt. 60, App. C

14 CFR Ch. I (1-1-19 Edition)
TABLE C3D - FUNCTIONS AND SUBJECTIVE TESTS - Continued
QPS requirements
Motion system (and special
aerodynamic model) effects

Entry No.

kpayne on VMOFRWIN702 with $$_JOB

Information
Simulator level
Notes
B

C

D

X

X

X

X

X

1 ...............

Runway rumble, oleo deflection, ground
speed, uneven runway, runway and taxiway centerline light characteristics:
Procedure: After the helicopter has been preset to the takeoff position and then released,
taxi at various speeds with a smooth runway
and note the general characteristics of the
simulated runway rumble effects of oleo deflections. Repeat the maneuver with a runway roughness of 50%, then with maximum
roughness. Note the associated motion vibrations affected by ground speed and runway roughness

If time permits, different gross weights can
also be selected as this may also affect the
associated vibrations depending on helicopter type. The associated motion effects
for the above tests should also include an
assessment of the effects of rolling over
centerline lights, surface discontinuities of
uneven runways, and various taxiway characteristics.

2 ...............

Friction Drag from Skid-type Landing Gear:
Procedure: Perform a running takeoff or a running landing and note an increase in a fuselage vibration (as opposed to rotor vibration)
due to the friction of dragging the skid along
the surface. This vibration will lessen as the
ground speed decreases

3. ..............

Rotor Out-of-Track and/or Out-of-Balance
condition:
Procedure: Select the malfunction or condition
from the IOS. Start the engine(s) normally
and check for an abnormal vibration for an
Out-of-Track condition and check for an abnormal vibration for an Out-of-Balance condition

X

X

X

Does not require becoming airborne. The abnormal vibration for Out-of-Track and Out-ofBalance conditions should be recognized in
the frequency range of the inverse of the
period for each; i.e., 1/P for vertical vibration, and 1/P for lateral vibration.

4. ..............

Bumps associated with the landing gear:
Procedure: Perform a normal take-off paying
special attention to the bumps that could be
perceptible due to maximum oleo extension
after lift-off

X

X

X

When the landing gear is extended or retracted, motion bumps can be felt when the
gear locks into position.

5. ..............

Buffet during extension and retraction of
landing gear:
Procedure: Operate the landing gear. Check
that the motion cues of the buffet experienced represent the actual helicopter

X

X

X

6. ..............

Failure of Dynamic Vibration Absorber or
similar system as appropriate for the helicopter (e.g., droop stop or static stop):
Procedure: May be accomplished any time the
rotor is engaged. Select the appropriate failure at the IOS, note an appropriate increase
in vibration and check that the vibration intensity and frequency increases with an increase in RPM and an increase in collective
application

X

X

X

7. ..............

Tail Rotor Drive Failure:
Procedure: With the engine(s) running and the
rotor engaged - select the malfunction and
note the immediate increase of medium frequency vibration

X

X

X

8. ..............

Touchdown cues for main and nose gear:
Procedure: Conduct several normal approaches with various rates of descent.
Check that the motion cues for the touchdown bumps for each descent rate are representative of the actual helicopter

X

X

X

The tail rotor operates in the medium frequency range, normally estimated by multiplying the tail rotor gear box ratio by the
main rotor RPM. The failure can be recognized by an increase in the vibrations in this
frequency range.

402

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