# SDR AALA202306232260

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 21, 2023
- Submitted: June 23, 2023
- Operation: Air carrier
- Aircraft: [N458AL](https://openairdocs.org/aircraft/N458AL), registered now
- Make and model: Airbus A321-253NX
- Registry model: [Airbus A321-253NX](https://openairdocs.org/model/airbus-a321-253nx) (OpenAirDocs)
- Aircraft serial: 10819
- Aircraft time: 3,492 hours, 999 cycles
- System (JASC): [5210 · Passenger/Crew Doors](https://openairdocs.org/jasc/5210)
- Part: Cover Plate
- Condition: Out Of Adjust
- Location: Zone 800 - Doors
- Stage of operation: CL
- How discovered: O
- Nature of condition: E
- Precautionary procedure: A, O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202306232260

## Discrepancy

AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED AND THE AIRCRAFT TO SEA. CLIMBING THROUGH 17000', 340 KNOTS FLIGHT ATTENDANT CALLED AND INDICATED LOUD LOW MECHANICAL RUMBLING. METAL GRINDING, CARTS AIRCRAFT RIGHT VIBRATING AND THE LEFT SIDE STATIONARY. THEY COULD FEEL VIBRATION IN TOUCHING FLOOR WHEN NEAR DOOR. FLIGHT CREW LEVELED OFF AT FL 210 AND VIBRATION DISSIPATED.VIBRATION RETURNED UPON PITCH/ POWER CHANGES FOR CLIMBS AND DESCENTS. THE AIRCRAFT LANDED SAFELY AT SEA WITHOUT FURTHER INCIDENT. MAINTENANCE FOUND THE R4 DOOR UPPER COVER PLATE OUT OF ADJUSTMENT AND ADJUSTED IT PER AMM 52-10-00-220-007-A.

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