# SDR AALA202607168085

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 13, 2026
- Submitted: July 16, 2026
- Operation: Air carrier
- Aircraft: [N135NN](https://openairdocs.org/aircraft/N135NN), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 6520
- Aircraft time: 34,954 hours, 13,135 cycles
- System (JASC): [5100 · Standard Practices/Structures](https://openairdocs.org/jasc/5100)
- Part: Unknown
- Condition: Vibration
- Location: N/A
- Stage of operation: CL
- How discovered: O
- Nature of condition: E
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202607168085

## Discrepancy

AIRCRAFT WAS GROUNDED: LIGHT TO MODERATE INTERMITTENT AIRFRAME VIBRATION WAS FELT CLIMBING THROUGH 10,000' TO FL250. AUTOPILOT WAS ENGAGED, AIRSPEED WAS INCREASING TO 310 KNOTS, NO FLIGHT CONTROL OSCILLATIONS WERE OBSERVED ON THE F/CTL SD PAGE, VIBRATION WAS FELT ON THE FLIGHT DECK AND MORE PRONOUNCED IN THE MID AND AFT CABIN FLOORS REPORTED BY THE FA'S. CHANGING PITCH AND OR AIRSPEED RESULTED IN NO CHANGE TO THE VIBRATION, AFTER CLIMBING THROUGH FL 250 THE VIBRATION DISSIPATED.   (OPEN)

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