# SDR AALA202510309904

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 12, 2025
- Submitted: October 30, 2025
- Operation: Air carrier
- Aircraft: [N904AN](https://openairdocs.org/aircraft/N904AN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 29506
- Aircraft time: 69,500 hours, 29,037 cycles
- System (JASC): [5523 · Elevator, Tab Structure](https://openairdocs.org/jasc/5523)
- Part: Tab
- 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/AALA202510309904

## Discrepancy

AIRCRAFT IN BASE MAINTENANCE: RIGHT ELEVATOR TAB CONTROL MECHANISM SPRING SUPPORT BUSHINGS SHOW SIGNS OF CORROSION. REMOVED AND INSTALLED NEW BUSHINGS ON THE RIGHT HAND ELEVATOR TAB CONTROL MECHANISMS. PER B737NG AMM 27-31-34 AND PERFORMED SATISFACTORYELEVATOR TAB CONTROL SYSTEM OPERATIONAL TEST. PER B747NG AMM 27-31-00700-815 AND PERFORMED SATISFACTORY ELEVATOR AND ELEVATOR TRIM CONTROL SYSTEM OPERATIONAL TEST. PER B737NG AMM 27-31-00710-801.

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