# SDR AALA202606287933

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 23, 2026
- Submitted: June 28, 2026
- Operation: Air carrier
- Aircraft: [N904AA](https://openairdocs.org/aircraft/N904AA), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 7613
- Aircraft time: 28,089 hours, 11,160 cycles
- System (JASC): [3710 · Vacuum Distribution System](https://openairdocs.org/jasc/3710)
- Part: Vacuum Sys
- Part number: 14330375
- Part serial: 7377
- Condition: Defective
- Location: Zone 900
- Part time: 28,375 hours, 12,648 cycles
- Stage of operation: DE
- 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/AALA202606287933

## Discrepancy

AIRCRAFT WAS GROUNDED: AFTER LANDING, NUMBER 3 FLIGHT ATTENDANT ADVISED THAT DURING THE DESCENT BELOW 10000 FEET HE SMELLED BURNING RUBBER SMELL WHILE SEATED IN THE MID FLIGHT ATTENDANT JUMPSEAT. NUMBER 2 AND 4 FLIGHT ATTENDANTS REPORTED THAT UPON ARRIVAL AT THE GATE THEY HEARD A LOUD WHINING SOUND WHICH TURNED INTO A GRINDING SOUND WHICH ABRUPTLY STOPPED AND WAS IMMEDIATELY FOLLOWED BY A BURNING RUBBER SMELL. MAINTENANCE ACCOMPLISHED TASK CARD 26L00021001 AND FOUND TOILET VACUUM GENERATOR TO BE THE CAUSE OF GRINDING SOUND AND RUBBER BURNING SMELL. MAINTENANCE REPLACED THE TOILET VACUUM GENERATOR PER AMM 38-31-64 AND ACCOMPLISHED A SATISFACTORY OPERATIONAL / LEACK CHECK WITH NO ISSUES OR ODORS NOTED.

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