d. Selecting Limits Display
The limits display presents the results from limit checking on measured data. This holding of data is done to
determine if adjustments will be required on the aircraft. To select the limits display, place the cursor over the
View Limits selection and press the DO key.
The purpose of the limits checking software is to notify the user that measured data has exceeded specific
limits. The limit monitoring system allows for range checking of measured vibration data for a specific limit
and allows the calculation and display of the maximum track spread. The maximum track spread is the
difference between the highest and lowest flying blades. The limits and data to be limit checked are
completely specified in the aircraft-initialization files and are modified by using the DPL language by AMCOM
Selecting Summary Displays
The purpose of the Summary Displays is to provide a general way of picking and displaying a given number
of the highest peak points of any of the vibration modes over a specified point range. Track and lag data are
also available as Summary Displays. To select the Summary Display mode, place the cursor over the
Summary Displays selection and press DO.
If a complete printout of the Summary Displays is desired, press the PRINT key. A printout of all Summary
Displays will be printed, see figure 2. This printout will provide the user with a comprehensive, easy to read
report of Test State results for the entire Flight Plan.
The Summary Displays have been created to enable the user to get a summary of collected data for a flight,
without having to maneuver through multiple menus to get all of the desired display data. The Summary
Displays are set up by aircraft type. The Flight Plan, and flight ID over all acquisitions are specified. They are
presented as one menu that the user can quickly page through to view each display setup for the Flight Plan.
All data is displayed in a tabular format.
There are four types of Summary Displays available that are determined by the aircraft setup files:
1. SUM_LAG: The lag Summary Display provides tables of both the lag values and the standard deviation
values of lag for all blades. Use the UP and DOWN arrow keys to switch between these two tables.
2. SUM TRACK: The track summary can be set up to give the absolute track values, track values relative to
mean track, track values relative to a specified blade, two plane track, or track relative to a target pattern.
The standard deviation values for track are always available on the display. Use the UP and DOWN arrow
keys to switch between the track display and the standard deviation of track display.
3. SUM SYNCH: The synchronous sampled time average display is a point-by-point summary. The display is
set up to indicate which point will be displayed (e.g., 1/REV component, 2/REV component, etc.) over all
channels for each appropriate Test State in the Flight Plan.
4. SUM PEAK: The peak Summary Display is available for gathering high peak points for any of the specified
vibration data types (SSTA, SSTAR, SSPA, SSPA ZOOM, ASPA, and ASPA ZOOM). The highest peak
point over the specified range will appear in the display.
If a particular Summary Display does not have any data to display, the following message will appear:
ERROR - 32760: No or inconsistent data for display
Using Various Data Displays
This paragraph describes the operation of the various display types allowed by the AVA. It is important to
note that the particular displays available for the selected aircraft are determined by the aircraft initialization
script files. Only selected displays will be available for the aircraft. The units displayed can be changed by
entering the Manager Menu and selecting the setup option, then selecting the units option. The following
display units are available:
Hz or RPM
degrees, RADS-AT clock angle (hours and minutes), radians or Chadwick-Helmuth hours
(hours and minutes)
mils, gs or ips
mm, inches, meters, feet or mils