What was found
IRU PROBLEM. RTFL. UNABLE TO DUPLICATE, ALL BITE TESTS WERE SATISFACTORY, NO LAST FLT FAULTS IN MCDP FOR ANYTHING. REPLACED NR 1 INERTIAL REFERENCE UNIT AND FLIGHT MGMT COMPUTER (PRECAUTIONARY).
- Difficulty date
- May 15, 2009
- Submitted
- May 20, 2009
- Operation
- Air carrier
- Aircraft
- N546UA
- Make and model
- Boeing 757222
- Aircraft serial
- 25367
- Aircraft time
- 65,287 hours, 18,985 cycles
- Engine
- Pwa PW2037
- System (JASC)
- 3441 · Inertial Guidance System
- Part
- Iru
- Part number
- HG1050AE10
- Part serial
- 468
- Condition
- Malfunctioned
- Location
- Nr 1
- Stage of operation
- CL
- How discovered
- O
- Nature of condition
- O
- Precautionary procedure
- A
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.