What was found
NR 1 INS DIFFERS FROM NR 2 INS BY 35 NM OR 50 KTS. FAILED ACCURACY TEST. DUMPED FUEL AND DIVERTED TO JFK. REPLACED NR 1 INU AND ALIGNED OPS CHECKED OK PER 34-41-03. (S)
- Difficulty date
- August 18, 2008
- Submitted
- August 20, 2008
- Operation
- Air carrier
- Aircraft
- N809MC
- Make and model
- Boeing 747228F
- Aircraft serial
- 20887
- System (JASC)
- 3441 · Inertial Guidance System
- Part
- Inu
- Part number
- 46300161300413
- Part serial
- 1520
- Condition
- Failed
- Location
- Nr 1
- Stage of operation
- NR
- How discovered
- O
- Nature of condition
- N
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.