The Litton LTN-92 has three main hardware parts in the cockpit:
The system requires stable 115V AC or 28V DC power from ground power, the APU, or aircraft engines.
Are you using the LTN-92 in a (like the Felis 747) or looking for technical maintenance specs? ltn-92 manual
The aircraft must remain completely stationary.
: Complete system de-energization. A 12-second shutdown delay is hardcoded into the unit to safely park processor logic. The Litton LTN-92 has three main hardware parts
If the system shows a position error greater than the certified knots-per-hour rate, a recalibration or sensor check is required. 5. Summary of Technical Specifications Specification Sensor Type Ring Laser Gyro (RLG) Alignment Time ~10 Minutes Accuracy 2.0 nm/hr (standard) Interfaces ARINC 429, Analog, and RS-232
If a fix isn't in the database, you can enter custom coordinates. : Complete system de-energization
Once aligned and programmed, the system is switched to "NAV" mode to provide steering commands to the flight director or autopilot. Manuals & Documentation Resources
In aircraft with three units, the system averages their positions to minimize error.
The critical initial phase where the system determines "True North" and its current latitude/longitude while the aircraft is stationary.
Input the current airport gate coordinates into the POS (Position) page. Initiate Alignment: Move the selector to ALIGN.