# SDR ASAA2019032328738

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 23, 2019
- Submitted: March 25, 2019
- Operation: Air carrier
- Aircraft: [N506AS](https://openairdocs.org/aircraft/N506AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35690
- Aircraft time: 40,589 hours, 12,435 cycles
- System (JASC): [2230 · Auto Throttle System](https://openairdocs.org/jasc/2230)
- Part: Servo Motor
- Part number: 305RAA1
- Part serial: AS05444
- Condition: Faulty
- Location: Autothrottle Sys
- Part time: 39,751 hours, 12,160 cycles
- Stage of operation: IN
- 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/ASAA2019032328738

## Discrepancy

FOLLOW-UP TO HISTORY OF THROTTLE SPLIT. GROUNDED - YES. ENGINEERING REQUEST - REMOVED AND REPLACED FCC A PER AMM 22-11-33. REMOVED AND REPLACED THE AUTOTHROTTLE SERVO MOTOR PER AMM 22-31-91, OPS CHECK GOOD PER SAME. ACCOMPLISHED FCC LLM MAINTENANCE TEST PER AMM 22-11-33-400-801 STEP J. (1) (A AND B) TEST SUCCESSFUL. ETOPS GROUND VERIFICATION SUCCESSFUL.

---
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.