# SDR AALA202604284928

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 26, 2026
- Submitted: April 28, 2026
- Operation: Air carrier
- Aircraft: [N145AN](https://openairdocs.org/aircraft/N145AN), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 6783
- Aircraft time: 32,657 hours, 12,808 cycles
- System (JASC): [4900 · Airborne Auxiliary Power Unit (APU) System](https://openairdocs.org/jasc/4900)
- Part: Apu
- Part number: 38007081
- Part serial: P4101
- Condition: Contaminated
- Location: Zone 100
- Part time: 40,196 hours, 21,324 cycles
- Stage of operation: CL
- How discovered: O
- Nature of condition: B
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202604284928

## Discrepancy

AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED AND THE AIRCRAFT RETURNED TO GND DUE TO THE FLIGHT CREW REPORTING THAT AFTER TAKEOFF CLIMBING THROUGH 400' THERE WAS A VERY STRONG FUME EVENT IN FLIGHT DECK AND CABIN AFFECTING EYES, NOSE, THROAT AND CHEST. NO VISIBLE SMOKE OR FUMES. THE AIRCRAFT LANDED SAFELY AT GND WITHOUT FURTHER INCIDENT. THE FLIGHT CREW REPORTED THAT THERE WAS NO VISIBLE OIL STREAKING ON OUTSIDE OF AIRCRAFT NOTED DUIRNG THE POST FLIGHT WALKAROUND. MAINTENANCE ACCOMPLISHED SMOKE / ODOR / FUME TROUBLESHOOTING PER JOB CARD 26L00021001 AND A DECONTAMINATION OF THE ENVIRONMENTAL CONTROL SYSTEM PER JOB CARD 26L00021013 WITH NO ODORS NOTED.

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