# SDR AALA202201182698

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 14, 2022
- Submitted: January 18, 2022
- Operation: Air carrier
- Aircraft: [N141NN](https://openairdocs.org/aircraft/N141NN), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 6656
- Aircraft time: 19,866 hours, 7,507 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: A/C Pack
- Condition: Odor
- Location: Nr 2
- Stage of operation: CL
- How discovered: O
- Nature of condition: B
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202201182698

## Discrepancy

AIRCRAFT WAS GROUNDED: ACRID ODOR DEVELOPED AFTER TAKE OFF & DURING CLIMB, STOPPED CLIMB AT 210 & STARTED APU ON APU BLEED ODOR SUBSIDED APPLIED QRH PROCEDURE TO DETERMINE SOURCE OF ODOR. ODOR RETURNED WITH PACK 2 ON ENGINE 2 BLEED. CONTINUED FLIGHT SINGLE PACK WITH PACK 1 ON ENG 1 BLEED WITH NO FURTHER ODOR.   PERFORMED TROUBLESHOOTING TASK CARD 26L00021001, INSPECTED ENGINE AND APU COMPARTMENTS AND WAS UNABLE TO RE-CREATE THE ODOR OR FIND ANY ACTIVE CAUSE OF THE ODOR. AIRCRAFT WAS RETURNED TO SERVICE.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.