not free up space for the measurement that is being attempted. At this point it is necessary to run the
Compress basically frees all the old structures and recopies data into new clean files. This tendency to not
re-use old database records results in what is commonly referred to as database fragmentation.
Deleting Data Records
permanently delete collected data.
This operation will delete data from the database. Select the option by placing the cursor over Delete and
pressing the DO key. Data can be deleted in one of the following ways:
(a) Delete Aircraft Data. Deletes all flight data records for this type of aircraft.
(b) Delete by Tail Number. Deletes all flight data for the chosen tail number of the aircraft.
(c) Delete by Flight. Deletes selected flight data for the chosen aircraft and tail number.
(d) Delete Aircraft Setup. Deletes all flight data and the setup information for the chosen aircraft.
(e) Delete Credit Card Data. If backed-up data exists on the installed CCM, this option may be used to
delete the stored data by Aircraft Type, Tail Number, or Flights.
After selecting one of the above options, prompting will occur one more time by a safety screen. Use the
RIGHT or LEFT arrow keys to place a Yes in the question box and press the DO key.
When operation is to delete aircraft setup, a special
8-digit number must be entered in the Entry Form that is
displayed. When prompted, enter the following number:
The deletion operation allows deletions based on aircraft type, tail number, and flights. If an aircraft is
deleted, all setup data and flight results will be removed. If a flight or tail number is chosen, then the flight
results will be deleted. Tail numbers and aircraft can be deleted whether or not flight results exist.
Deletion by Flight ID is a more discriminating way of removing data and freeing space. Remember, the Flight
ID is a unique number that is assigned to a particular flight. For instance, if a measurement is desired on the
flight line and a database full error occurs, it will be necessary to delete data. Returning to the oldest data for
that Flight ID and deleting the oldest data associated with that Flight ID would enable retaining more recent
Always compress after deleting data.
Selecting Data Transfer
Place the cursor over the Data Transfer, figure 3, selection from the manager menu and press DO. Three data
transfer options will appear in the next screen. The functions and operation of these three functions are explained
in the following paragraphs.