# SDR ASAA2017092222021

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 22, 2017
- Submitted: September 25, 2017
- Operation: Air carrier
- Aircraft: [N557AS](https://openairdocs.org/aircraft/N557AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35176
- Aircraft time: 43,286 hours, 12,774 cycles
- System (JASC): [2230 · Auto Throttle System](https://openairdocs.org/jasc/2230)
- Part: Switch
- Part number: 254A115011
- Part serial: AC00557
- Condition: Faulted
- Location: Autothrottle
- Part time: 2,833 hours, 850 cycles
- Stage of operation: LD
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2017092222021

## Discrepancy

AFTER LANDING THE NR 1 THRUST REVERSER LEVER LOCKED UP AND WOULD NOT RELEASE FROM 1ST DETENT.   NR 2 THRUST REVERSER OPERATED NORMALLY. SHORTLY AFTER LANDING,  THE NR 1 THRUST REVERSER LIGHT ON OVERHEAD PANEL ILLUMINATED.  NR 1 THRUST REVERSER LIGHT REMAIN ILLUMINATED ON OVERHEAD PANEL.  ACFT GROUNDED.  EAU BITE SHOWS NR 1 ENGINE STOW FAULT S834, DIR CONT VALVE SENSOR. SUSPECT BAD NR 1 AUTOTHROTTLE SWITCH PACK.  R & R THE NR 1 AUTOTHROTTLE SWITCH PACK ASSY IAW AMM 76-11-07-401. ALL TESTED NORMAL. CYCLED THE NR 1 THRUST REVERSER SEVERAL TIMES. NO FAULTS.

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