# SDR AALA202311161750

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 14, 2023
- Submitted: November 16, 2023
- Operation: Air carrier
- Aircraft: [N923US](https://openairdocs.org/aircraft/N923US), registered now
- Make and model: Airbus A320*
- Aircraft serial: 6543
- Aircraft time: 27,630 hours, 11,088 cycles
- System (JASC): [2120 · Air Distribution System](https://openairdocs.org/jasc/2120)
- Part: Air Filter
- Part number: UNKNOWN
- Condition: Dirty
- Location: Zone 200 - Fuse
- Stage of operation: CL
- How discovered: O
- Nature of condition: B
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202311161750

## Discrepancy

AIRCRAFT WAS GROUNDED: THROUGHOUT FLIGHT MAINLY CLIMB & DESCENT BURNING RUBBER ODOR REPORTED MID CABIN, APU BLEED WAS USED FOR TAKEOFF. AFTER PERFORMING SOF TROUBLESHOOTING, FOUND HEPA FILTER TO BE DIRTY, REMOVED AND REPLACED HEPA FILTER.

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