What was found
RIGHT INERTIAL REFERENCE SYSTEM FAULT LIGHT CAME ON IN FLIGHT FL380 LOST ALL NAVIGATION SYSTEMS, BOTH CAPTAIN`S AND FIRST OFFICER`S SIDE. AIR TURNBACK, DECLARED EMERGENCY. R & R THE RT AIR DATA INERTIAL REFERENCE UNIT IAW MM.
- Difficulty date
- August 13, 2017
- Submitted
- August 14, 2017
- Operation
- Air carrier
- Aircraft
- N7842A
- Make and model
- Boeing 73773V
- Aircraft serial
- 30237
- Aircraft time
- 46,929 hours, 29,397 cycles
- System (JASC)
- 3420 · Attitude and Direction Data System
- Part
- Air Data Module
- Part number
- HG2050AC07
- Part serial
- 56013407
- Condition
- Malfunctioned
- Location
- Cockpit
- Stage of operation
- NR
- How discovered
- O
- Nature of condition
- J
- Precautionary procedure
- A
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.