# SDR ASAA2023082944828

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 29, 2023
- Submitted: August 30, 2023
- Operation: Air carrier
- Aircraft: [N483AS](https://openairdocs.org/aircraft/N483AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 36350
- Aircraft time: 29,637 hours, 9,269 cycles
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Unknown
- Part number: UNKNOWN
- Condition: Unknown
- Location: Unknown
- Stage of operation: NR
- How discovered: V
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2023082944828

## Discrepancy

STAB OUT OF TRIM LIGHT INTERMITTENTLY ILLUMINATED ON AUTOPILOT A W/AIRPLANE IN TRIM BEFORE ENGAGEMENT.STAB OUT OF TRIM LIGHT REMAINED ILLUMINATED ON AUTOPILOT B STEADY. GROUNDED - YES. LAST LEG SHOWS DFCS A MSG 22-11177(7 HITS) STAB TRIM ACTUATOR, MSG 22-11161 COL SW MODULE M 1201, MSG 22-11186 TRIM AND RESPONSE MONITOR. ACCOMP BITE LIBRARY TEST 60.32 TEST PASSED.(REF TST 71480) STAB TRIM ACT HAS BEEN CHANGED)M SKRIVANIC 10241 08-28-2023 '' NOTE DFCS B SHOWED 5 HITS OF THE SAME MESSAGES'' M SKRIVANIC 10241 08-28-2023 ACCOMPLISHED TROUBLESHOOTING FOR STAB OUT OF TRIM LIGHT WITH DFCS BITE PROCEDURE ALL TESTS PASSED REF FIM 22-11 TASK 851. ETOPS SIGNIFICANT CHECK SUCCESSFUL SEAMC DARWIN NOTIFIED.

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