
CSP
−
HE/HS
−
1
Performance Data
MD 500
(Models 369HE/HS/HM)
ROTORCRAFT FLIGHT MANUAL
FAA Approved
Revision 5
5
−
29
5
−
7. POWER CHECK CHART
−
ALLISON 250
−
C18 ENGINE
Description
The Power Check Chart shows the relationship of engine torque, turbine outlet
temperature, and horsepower at various conditions of pressure altitude and
OAT for an Allison 250−C18 engine producing specification power as installed in
the Model 500 helicopter. The primary purpose of this chart is its use as an
engine performance trending tool to aid in determining whether the engine is
producing specification power, or if engine power deterioration has occurred.
NOTE
Power check data taken at regular intervals should be plotted to monitor trends
in engine condition. See Allison 250
−
C18 Series Operation and Maintenance
Manual for additional information on trend analysis.
The power check chart is based on the following conditions:
103 percent N
2
.
Cabin heat and engine anti−ice OFF.
Particle separator SCAV AIR OFF.
30 amperes electrical load.
Engine bleed valve closed.
WARNING
Do not exceed engine/aircraft limits.
Accessories required for safe flight should be operated during
each check.
Maintain separation from objects in air or on the ground.
CAUTION
Reset altimeter if required after obtaining pressure altitude.
Содержание MILVIZ MD530F
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