CSP
−
902RFM207E
−
1
ROTORCRAFT FLIGHT MANUAL
MD900 (902 Configuration with PW 207E)
Performance Data
5
−
60
FAA Approved
Reissue 2
Revision 5
VIEWING THE PREVIOUS POWER CHECK:
Select
POWER CHECK
top level menu on IIDS alphanumeric display.
Press the
ENT
key once to access the second level menu.
PERFORM POWER
ASSURANCE CHK
Press the
key to enter the next second level menu.
VIEW LAST POWER
ASSURANCE CHK
Press the
ENT
to view the last power check.
L PA CHK NG-X.X
L PA CHK EGT-XX.X
Press the
key to view the results for the other engine.
R PA CHK NG-X.X
R PA CHK EGT-XX.X
5
−
12. POWER ASSURANCE CHECK
−
MANUAL
HOW TO PERFORM THE CHECK:
The engine to be checked should be at FLY.
The other engine should be at IDLE or OFF.
IPS and CABIN HEAT should be off and the generator load should be 10%
or less.
Record the IIDS OAT and pressure altitude.
Use the Engine Torque Chart (Ref. Figure 5-50) to
determine the torque value
to be utilized based on the OAT
and pressure altitude recorded in the previous
step.
Increase collective and stabilize at the predetermined
torque value. After one
minute, record the EGT and N
G
from
the IIDS.
Use the EGT Chart (Ref. Figure 5-51) and the N
G
or Figure 5-53) to determine maximum values of
EGT and N
G
for the specific
conditions. Subtracting the
recorded values from the maximum values will
result in the
EGT and N
G
margins.
NOTE
:
The IIDS displays N
G
in tenths (ie. 91.6%) viewable at the third level of the
POWER CHECK menu.
The power check is passed if both the EGT and N
G
margins are
greater than
or equal to zero. If either the EGT or N
G
margin is negative, repeat the test
allowing torque to
stabilize for 5 minutes. If the EGT margin is still
negative,
then the power assurance check is failed. If only
the N
G
margin is negative
refer to the Rotorcraft
Maintenance Manual for additional testing and
trouble
shooting.
Summary of Contents for MD900 Explorer
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