# SDR AALA202607148042

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 10, 2026
- Submitted: July 15, 2026
- Operation: Air carrier
- Aircraft: [N343RY](https://openairdocs.org/aircraft/N343RY), registered now
- Make and model: Boeing 737-8
- Registry model: [Boeing 737-8](https://openairdocs.org/model/boeing-737-8) (OpenAirDocs)
- Aircraft serial: 44467
- Aircraft time: 17,797 hours, 6,529 cycles
- System (JASC): [5710 · Wing Main, Frame Structure](https://openairdocs.org/jasc/5710)
- Part: Winglet
- Condition: Vibration
- Location: Zone 500
- Stage of operation: CR
- How discovered: O
- Nature of condition: E
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202607148042

## Discrepancy

AIRCRAFT WAS GROUNDED: VIBRATION STARTED ABOVE FL310.  INITIALLY NOTED AS A RUMBLE IN 5E FLOOR BOARD THEN FELT IN SEAT.  AT FL390, MACH.79 WAS ITS GREATEST INTENSITY. WALKED BACK TO MID CABIN AND COULD STILL BE FELT IN THE FLOOR.  DESCENDED TO FL340 AND VIBS PERSISTED (NO WIND,SAT -38 /+14 ISA, TAT -10. L/R ENGINE VIB .3.  SLOWED TO .76 AND DEPLOYED SPEED BRAKES TO TEST, NO CHANGE.  STILL FELT VIBES AT FL290 AT 290KIAS.  LEVEL AT FL240 VIBS ENDED. DECESION MADE TO RETURN TO DFW, AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE REPLACED REPLACED LT WINGLET PER E.A. 377106.

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