Pt. 60, App. A

14 CFR Ch. I (1-1-19 Edition)

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13. ACCEPTANCE GUIDELINES FOR ALTERNATIVE
ENGINES DATA.
a. Background
(1) For a new airplane type, the majority of
flight validation data are collected on the
first airplane configuration with a  - baseline -  engine type. These data are then used
to validate all flight simulators representing
that airplane type.
(2) Additional flight test validation data
may be needed for flight simulators representing an airplane with engines of a different type than the baseline, or for engines
with thrust rating that is different from previously validated configurations.
(3) When a flight simulator with alternate
engines is to be qualified, the QTG should
contain tests against flight test validation
data for selected cases where engine differences are expected to be significant.

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b. Approval Guidelines For Validating
Alternate Engine Applications
(1) The following guidelines apply to flight
simulators representing airplanes with alternate engine applications or with more than
one engine type or thrust rating.
(2) Validation tests can be segmented into
two groups, those that are dependent on engine type or thrust rating and those that are
not.
(3) For tests that are independent of engine
type or thrust rating, the QTG can be based
on validation data from any engine application. Tests in this category should be designated as independent of engine type or
thrust rating.
(4) For tests that are affected by engine
type, the QTG should contain selected engine-specific flight test data sufficient to
validate that particular airplane-engine configuration. These effects may be due to engine dynamic characteristics, thrust levels
or engine-related airplane configuration
changes. This category is primarily characterized by variations between different engine manufacturers- products, but also includes differences due to significant engine
design changes from a previously flight-validated configuration within a single engine
type. See Table A2D, Alternate Engine Validation Flight Tests in this section for a list
of acceptable tests.
(5) Alternate engine validation data should
be based on flight test data, except as noted
in sub-paragraphs 13.c.(1) and (2), or where
other data are specifically allowed (e.g., engineering simulator/simulation data). If certification of the flight characteristics of the
airplane with a new thrust rating (regardless
of percentage change) does require certification flight testing with a comprehensive

stability and control flight instrumentation
package, then the conditions described in
Table A2D in this section should be obtained
from flight testing and presented in the
QTG. Flight test data, other than throttle
calibration data, are not required if the new
thrust rating is certified on the airplane
without need for a comprehensive stability
and control flight instrumentation package.
(6) As a supplement to the engine-specific
flight tests listed in Table A2D and baseline
engine-independent tests, additional enginespecific engineering validation data should
be provided in the QTG, as appropriate, to facilitate running the entire QTG with the alternate engine configuration. The sponsor
and the NSPM should agree in advance on
the specific validation tests to be supported
by engineering simulation data.
(7) A matrix or VDR should be provided
with the QTG indicating the appropriate validation data source for each test.
(8) The flight test conditions in Table A2D
are appropriate and should be sufficient to
validate implementation of alternate engines in a flight simulator.
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BEGIN QPS REQUIREMENT
c. Test Requirements
(1) The QTG must contain selected enginespecific flight test data sufficient to validate
the alternative thrust level when:
(a) the engine type is the same, but the
thrust rating exceeds that of a previously
flight-test validated configuration by five
percent (5%) or more; or
(b) the engine type is the same, but the
thrust rating is less than the lowest previously flight-test validated rating by fifteen
percent (15%) or more. See Table A2D for a
list of acceptable tests.
(2) Flight test data is not required if the
thrust increase is greater than 5%, but flight
tests have confirmed that the thrust increase does not change the airplane-s flight
characteristics.
(3) Throttle calibration data (i.e., commanded power setting parameter versus
throttle position) must be provided to validate all alternate engine types and engine
thrust ratings that are higher or lower than
a previously validated engine. Data from a
test airplane or engineering test bench with
the correct engine controller (both hardware
and software) are required.
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BEGIN QPS REQUIREMENT

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