# SDR AALA2019051400008

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 14, 2018
- Submitted: May 14, 2018
- Operation: Air carrier
- Aircraft: [N751AN](https://openairdocs.org/aircraft/N751AN), registered now
- Make and model: Boeing 777223
- Aircraft serial: 30798
- Aircraft time: 1 hours, 1 cycles
- System (JASC): [2740 · Stabilizer Control System](https://openairdocs.org/jasc/2740)
- Part: Bearing
- Condition: Damaged
- Location: Horizontal Stab
- Stage of operation: NR
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA2019051400008

## Discrepancy

EXTENSIVE DAMAGE TO THE BALL SCREW AND BALL NUT INCLUDING SEPARATION OF THE BALL BEARING TRANSFER TUBE FROM THE BALL NUT. DAMAGE WAS CAUSED BY A TRAPPED BALL BEARING INSIDE THE BALL NUT OF THE BALL SCREW ACTUATOR FOR THE HORIZONTAL STAB.

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