MD Helicopters MD900 with PW206E, Flight Manual

Page: 284 / 450

CSP–900RFM206E–1
ROTORCRAFT FLIGHT MANUAL
MD900 With PW 206E
Systems Description
Original
7–46
7–15.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). Only the Data Log and Cumulative Log are not
viewable on the alphanumeric display. The operating data is stored
in one of six data records.
The data records are:
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.
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. NO TAG) may be used to access
cumulative usage data as well as flight time data.
The exceedance Log provides a ‘‘snapshot’’ record of the parameter data
at a particular moment in time. This type of record occurs whenever
a parameter exceedance is detected.
Data Storage
Data Logs
Cumulative Log
Exceedance
Log