MD Helicopters MD900 Explorer, Flight Manual

Page: 309 / 564

CSP − 902RFM207E − 1
ROTORCRAFT FLIGHT MANUAL
MD900 (902 Configuration with PW 207E) Systems Description
Original
7 − 49
Reissue 2
7 − 16. IIDS DATA STORAGE
Selected information that is monitored by the IIDS for display is also
stored by the IIDS. Information is stored in non-volatile memory and
is available by selecting various menu functions through the front panel
keys. All information is available using a ground based maintenance
computer (GBMC). A partial Data Log and Cumulative Log are viewable
on the alphanumeric display. Complete Data and Cumulative logs are
available through the GBMC. The operating data is stored in one of
six data records:
LOG TYPE A/N DISPLAY
Data Log NO
Cumulative Log NO
Exceedance Log YES
Fault Log YES
Trend Log YES
Setup Log YES
The data log provides one and a half minutes of data collection. The
data is recorded in a continuous memory buffer ``loop'' and will be contin­
uously over-written unless an exceedance occurs, or the crew requests
a record of an event. Exceedances generate both data logs and excee­
dance logs. The data log record provides a ``window in time'' to examine
events around an exceedance or other incident. The data log can store
five of these events. This information is accessed by the GBMC only.
Pilots may generate a data log by first clearing the alphanumeric display,
then pressing and holding the “REC” button for 7 to 10 seconds before
releasing. The message RECORDING DATA will then be displayed on
the alphanumeric display.
The cumulative log retains data concerning the aircraft operational his­
tory and current configuration. As the aircraft configuration changes
(e.g. component changes) the Cumulative Log will be updated by the
maintainer on the GBMC. The IIDS will only retain one Cumulative
Log in memory.
NOTE
:
Time Summary Menu procedure (Ref. Figure 7 − 28) may be used to access
cumulative usage data as well as flight time data.
Data Storage
Data Logs
Cumulative Log