Forgot your password?
DFA-429
Document Actions
The Atlantis DFA-429 High Lift Data Analyzer (HILDA) is a portable, self-contained digital function analyzer for monitoring the Flap/Slat Electronics Unit (FSEU) data bus of the Boeing 757.
The HILDA has two principal applications in flight-line service:
- Calibrating the aircraft's high lift system during maintenance or when faults are suspected, and
- Recording data from the aircraft's high lift system for later analysis.
With the precise and accurate FSEU information provided by the HILDA, the operator can quickly identify faulty actuators. The HILDA translates and displays left and right flap and slat position information for calculating rigging errors, as well as in-flight and ground wind-up angles used in the actuator troubleshooting procedure.
The HILDA offers four modes of operation:
- Real-time mode permits monitoring of the aircraft's FSEU bus and display of FSEU labels (FSEU number, resolver angle, resolver position flags, flap lever detent labels) as they occur.
- Memory mode records FSEU bus activity for later analysis.
- Recall mode displays previously recorded data.
- Replay mode transmits previously recorded data to external ARINC 429 equipment for analysis.
The HILDA is housed in a portable, weather-resistant carrying case and can be powered by internal batteries or an external 12 - 18 volt DC or 115 volt 400 Hz AC supply.
Included with the HILDA are:
- A battery charger/test fixture with power cord,
- A 15-foot interface cable to connect the HILDA to the aircraft's FSEU data bus and power connector, and
- An 80-foot extension cable to enable the HILDA to be used on-site when making adjustments on aircraft wings.
2008 1QR Conference Call
