# SDR AALA2019112659021

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 23, 2019
- Submitted: November 26, 2019
- Operation: Air carrier
- Aircraft: [N986AN](https://openairdocs.org/aircraft/N986AN), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 7046
- Aircraft time: 11,072 hours, 4,118 cycles
- System (JASC): [2120 · Air Distribution System](https://openairdocs.org/jasc/2120)
- Part: Duct
- Part number: D2121017800411
- Condition: Damaged
- Location: E/E Ventilation
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: B, A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA2019112659021

## Discrepancy

AIRCRAFT WAS GROUNDED: MAINTENANCE REPORTS LOUD POP DURING CLIMB-OUT  6 - 7  K  / SHORTLY  AFTER  VENT BLOWER ECAM DIRECTING BLOWER OVRD / CABIN WOULD NOT PRESSURIZE / EMERGENCY DESENT INITIATED. EMERGENCY DECLARED. MAINTENANCE REPORTS AVIONICS VENTILATION DUCT WAS REPLACED. ALSO AVIONICS VENTILATION AIR INLET CHECK VALVE IAW AMM 21-26-42 AND 21-26-52.

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