# SDR AALA202603270681

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 23, 2026
- Submitted: March 27, 2026
- Operation: Air carrier
- Aircraft: [N924AN](https://openairdocs.org/aircraft/N924AN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 29525
- Aircraft time: 73,421 hours, 31,216 cycles
- Engine: Cfmint CFM567B20
- Engine time: 44,277 hours, 18,901 cycles
- System (JASC): [7200 · Engine (Turbine/Turboprop)](https://openairdocs.org/jasc/7200)
- Part: Engine
- Part number: CFM567B
- Part serial: 804437
- Condition: Failed
- Location: Nr 1
- Part time: 44,277 hours, 18,901 cycles
- Stage of operation: CR
- How discovered: O
- Nature of condition: E, R, B
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202603270681

## Discrepancy

AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: LEVELING OFF AT FL310 NUMBER 1 ENGINE N1 DIPPED AND SURGED AT LEAST 3 TIMES. THIS WAS ACCOMPANIED BY A BANGING NOISE HEARD IN THE COCKTAIL. FLIGHT ATTENDANT REPORTED SEEING SPARKS COMING FROM THE NUMBER ONE ENGINE AS WELL. ALSO HEARD AN AUDIBLE BANGING SOUND, AND REPORTED FEELING THE CABIN FLOOR VIBRATE. AIRCRAFT AIR INTERRUPTED BACK TO AND LANDED SAFELY AT ORD.  REMOVED AND REPLACED NUMBER 1 ENGINE ASSEMBLY. PER JC 08L40072003.

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