# SDR ASAA1158721

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 1, 2011
- Submitted: January 5, 2011
- Operation: Air carrier
- Aircraft: [N519AS](https://openairdocs.org/aircraft/N519AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 36482
- Aircraft time: 7,096 hours, 2,111 cycles
- System (JASC): [2230 · Auto Throttle System](https://openairdocs.org/jasc/2230)
- Part: Servo
- Part number: 305RAA1
- Part serial: AS05849
- Condition: Failed
- Location: Autothrottle Sys
- Part time: 7,119 hours, 2,113 cycles
- Stage of operation: TO
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA1158721

## Discrepancy

ON TAKEOFF ROLL AUTO THROTTLES DISCONNECTED ON POWER UP.  LEFT/RT SPLIT.  LEFT THROTTLE ADVANCED FASTER THEN THE RIGHT.  SERVO MOTOR TEST FAILS.  UNABLE TO GET RIGHT THROTTLE TO MOVE. NUMEROUS FAULTS.  NR 2 ASM SUSPECTED FAULT.  REPLACED NR 2 ASM REF MM 22 31 91.  OPS CHECK NORMAL  REF SAME MM.  CURRENT STATUS AND SERVO MOTOR TEST GOOD REF 22 31 00.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.