# SDR AALA202603131549

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 10, 2026
- Submitted: March 13, 2026
- Operation: Air carrier
- Aircraft: [N933AM](https://openairdocs.org/aircraft/N933AM), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 7564
- Aircraft time: 27,285 hours, 10,865 cycles
- System (JASC): [4900 · Airborne Auxiliary Power Unit (APU) System](https://openairdocs.org/jasc/4900)
- Part: Pressure Switch
- Part number: 38762552
- Condition: Fault Message
- Location: Zone 100
- Component: Apu, Honeywell, 1319A
- Component part number: 38007081
- Stage of operation: CR
- How discovered: V
- Nature of condition: H, O
- Precautionary procedure: A, O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202603131549

## Discrepancy

AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED AND THE AIRCRAFT DIVERTED TO ICT DUE TO THE FLIGHT CREW REPORTING THAT DURING CRUISE APU FAILED IN FLIGHT AS IT WAS BEING USED AS A SECONDARY ELECTRICAL POWER SOURCE FOR AN INOPERATIVE #1 IDG CONFIGURATION (PER MEL # 24 01B )  DURING DIVERSION DESCENT IDG TEMPERATURE INCREASED CONTINUOUSLY AND RECEIVED ECAM IDG 1 OIL OVERHEAT PER ECAM DISCONNECTED IDG #1 PUSH BUTTON. THE AIRCRAFT LANDED SAFELY AT ICT WITHOUT FURTHER INCIDENT. ** SUPPLEMENTAL REPORT FOR AALA202603121549 SUBMITTED 3/12/2026 BY TUL MAINTENANCE REPLACED THE APU LOW OIL PRESSURE SWITCH PER AMM 49-94-14 AND ACCOMPLISHED A SATISFACTORY LEAK / OPERATIONAL CHECK WITH NO ISSUES NOTED.  ** (CLOSED)

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