# SDR AALA202508053631

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 16, 2025
- Submitted: August 5, 2025
- Operation: Air carrier
- Aircraft: [N998NN](https://openairdocs.org/aircraft/N998NN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 31250
- Aircraft time: 25,755 hours, 11,068 cycles
- System (JASC): [5520 · Elevator Structure](https://openairdocs.org/jasc/5520)
- Part: Spring
- Condition: Corroded
- Location: Zone 300 Elev
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202508053631

## Discrepancy

AIRCRAFT IN BASE MAINTENANCE: LEFT HORIZONTAL STABILIZER ELEVATOR TAB CONTROL MECHANISM SPRINGS LOWER HARDWARE HAS EVIDENCE OF SURFACE RUST. REMOVED AND REPLACED LEFT HORIZONTAL STABILIZER ELEVATOR TAB CONTROL MECHANISM SPRINGS LOWER HARDWARE AND PERFORMED SATISFACTORYELEVATOR AND ELEVATOR TRIM CONTROL SYSTEM TEST AND ELEVATOR TABCONTROL SYSTEM OPERATIONAL TEST. PER B737-NG AMM 27-31-00, B737-NG AMM 27-31-34.

---
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.