# SDR IPXA2026092402007

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 24, 2026
- Submitted: September 25, 2026
- Operation: Air carrier
- Aircraft: [N161UP](https://openairdocs.org/aircraft/N161UP), registered now
- Make and model: Airbus A300 F4-622R
- Registry model: [Airbus A300 F4-622R](https://openairdocs.org/model/airbus-a300-f4-622r) (OpenAirDocs)
- Aircraft serial: 0850
- Aircraft time: 27,397 hours, 16,461 cycles
- System (JASC): [2120 · Air Distribution System](https://openairdocs.org/jasc/2120)
- Part: Valve
- Part number: EVT3745B
- Part serial: 1640000102
- Condition: Failed
- Location: Zone 200
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/IPXA2026092402007

## Discrepancy

OVERBOARD EXTRACT VALVE CAUSING EXTRACT FAN HIGH SPEED CIRCUIT BREAKER TO POP.   REVERSED, REMOVED AND REPLACED EXTRACT FAN (73HR) IAW AMM 21-23-11/401, NO HELP. TROUBLESHOT IAW ASM 21-33-00 SCH 02 FOUND BAD RELAY (68HR), REMOVED AND REPLACED RELAY (68HR) IAW ESPM 20-45-24-01 OPERATIONAL CHECK GOOD, THIS CLEARS DEFERRAL, PLACARD REMOVED

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