252
14 CFR Ch. I (1–1–14 Edition)
Pt. 60, App. C
f. The use of preliminary data is not indefi-
nite. The helicopter manufacturer’s final
data should be available within 12 months
after the helicopter first entry into service
or as agreed by the NSPM, the simulator
sponsor, and the helicopter manufacturer.
When applying for interim qualification
using preliminary data, the simulator spon-
sor and the NSPM should agree on the up-
date program. This includes specifying that
the final data update will be installed in the
flight simulator within a period of 12 months
following the final data release, unless spe-
cial conditions exist and a different schedule
is acceptable. The flight simulator perform-
ance and handling validation would then be
based on data derived from flight tests. Ini-
tial helicopter systems data should be up-
dated after engineering tests. Final heli-
copter systems data should also be used for
flight simulator programming and valida-
tion.
g. Flight simulator avionics should stay
essentially in step with helicopter avionics
(hardware and software) updates. The per-
mitted time lapse between helicopter and
flight simulator updates should be minimal.
It may depend on the magnitude of the up-
date and whether the QTG and pilot training
and certification are affected. Differences in
helicopter and flight simulator avionics
versions and the resulting effects on flight
simulator qualification should be agreed be-
tween the simulator sponsor and the NSPM.
Consultation with the flight simulator man-
ufacturer is desirable throughout the quali-
fication process.
h. The following describes an example of
the design data and sources that might be
used in the development of an interim quali-
fication plan.
(1) The plan should consist of the develop-
ment of a QTG based upon a mix of flight
test and engineering simulation data. For
data collected from specific helicopter flight
tests or other flights the required design
model or data changes necessary to support
an acceptable Proof of Match (POM) should
be generated by the helicopter manufacturer.
(2) For proper validation of the two sets of
data, the helicopter manufacturer should
compare their simulation model responses
against the flight test data, when driven by
the same control inputs and subjected to the
same atmospheric conditions as recorded in
the flight test. The model responses should
result from a simulation where the following
systems are run in an integrated fashion and
are consistent with the design data released
to the flight simulator manufacturer:
(a) Propulsion.
(b) Aerodynamics.
(c) Mass properties.
(d) Flight controls.
(e) Stability augmentation.
(f) Brakes/landing gear.
i. A qualified test pilot should be used to
assess handling qualities and performance
evaluations for the qualification of flight
simulators of new helicopter types.
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a. When a fully validated simulation (i.e.,
validated with flight test results) is modified
due to changes to the simulated helicopter
configuration, the helicopter manufacturer
or other acceptable data supplier must co-
ordinate with the NSPM to supply validation
data from an ‘‘audited’’ engineering simu-
lator/simulation to selectively supplement
flight test data. The NSPM must be provided
an opportunity to audit the use of the engi-
neering simulation or the engineering simu-
lator during the acquisition of the data that
will be used as validation data. Audited data
may be used for changes that are incre-
mental in nature. Manufacturers or other
data suppliers must be able to demonstrate
that the predicted changes in helicopter per-
formance are based on acceptable aero-
nautical principles with proven success his-
tory and valid outcomes. This must include
comparisons of predicted and flight test vali-
dated data.
b. Helicopter manufacturers or other ac-
ceptable data suppliers seeking to use an en-
gineering simulator for simulation valida-
tion data as an alternative to flight-test de-
rived validation data, must contact the
NSPM and provide the following:
(1) A description of the proposed aircraft
changes, a description of the proposed sim-
ulation model changes, and the use of an in-
tegral configuration management process,
including an audit of the actual simulation
model modifications that includes a step-by-
step description leading from the original
model(s) to the current model(s).
(2) A schedule for review by the NSPM of
the proposed plan and the subsequent valida-
tion data to establish acceptability of the
proposal.
(3) Validation data from an audited engi-
neering simulator/simulation to supplement
specific segments of the flight test data.
c. To be qualified to supply engineering
simulator validation data, for aerodynamic,
engine, flight control, or ground handling
models, a helicopter manufacturer or other
acceptable data supplier must:
(1) Be able to verify their ability to:
(a) Develop and implement high fidelity
simulation models; and
(b) Predict the handling and performance
characteristics of a helicopter with suffi-
cient accuracy to avoid additional flight test
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