Code of Federal Regulations - Title 14

113

Federal Aviation Administration, DOT

Pt. 60, App. A

ABLE

A3D—F

UNCTIONS AND

UBJECTIVE

ESTS

—Continued

QPS Requirements

Information

Entry no.

Motion system effects

Simulator level

Notes

A B C D

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

Buffet in the air due to flap and spoiler/

speedbrake extension and approach to stall
buffet:

Procedure: Perform an approach and extend

the flaps and slats with airspeeds delib-
erately in excess of the normal approach
speeds. In cruise configuration, verify the
buffets associated with the spoiler/
speedbrake extension. The above effects
can also be verified with different combina-
tions of spoiler/speedbrake, flap, and land-
ing gear settings to assess the interaction
effects.

X X X X

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

Approach to stall buffet:
Procedure: Conduct an approach-to-stall with

engines at idle and a deceleration of 1 knot/
second. Check that the motion cues of the
buffet, including the level of buffet increase
with decreasing speed, are representative
of the actual airplane.

X X X X

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

Touchdown cues for main and nose gear:
Procedure: Conduct several normal ap-

proaches with various rates of descent.
Check that the motion cues for the touch-
down bumps for each descent rate are rep-
resentative of the actual airplane.

X X X X

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

Nosewheel scuffing:
Procedure: Taxi at various ground speeds and

manipulate the nosewheel steering to cause
yaw rates to develop that cause the
nosewheel to vibrate against the ground
(‘‘scuffing’’). Evaluate the speed/nosewheel
combination needed to produce scuffing
and check that the resultant vibrations are
representative of the actual airplane.

X X X X

9. ..............

Thrust effect with brakes set:
Procedure: Set the brakes on at the take-off

point and increase the engine power until
buffet is experienced. Evaluate its charac-
teristics. Confirm that the buffet increases
appropriately with increasing engine thrust.

X X X X This effect is most discernible with wing-

mounted engines.

10. ............

Mach and maneuver buffet:
Procedure: With the simulated airplane

trimmed in 1 g flight while at high altitude,
increase the engine power so that the Mach
number exceeds the documented value at
which Mach buffet is experienced. Check
that the buffet begins at the same Mach
number as it does in the airplane (for the
same configuration) and that buffet levels
are representative of the actual airplane.
For certain airplanes, maneuver buffet can
also be verified for the same effects. Ma-
neuver buffet can occur during turning flight
at conditions greater than 1 g, particularly at
higher altitudes.

X X X

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