# SDR YENA200550

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 17, 2005
- Submitted: August 25, 2005
- Operation: Air carrier
- Aircraft: [N550JB](https://openairdocs.org/aircraft/N550JB), registered now
- Make and model: Airbus A320-232
- Registry model: [Airbus A320-232](https://openairdocs.org/model/airbus-a320-232) (OpenAirDocs)
- Aircraft serial: 1891
- Aircraft time: 11,782 hours, 4,169 cycles
- System (JASC): [2121 · Air Distribution Fan](https://openairdocs.org/jasc/2121)
- Part: Fan
- Part number: 20092455101
- Part serial: MA1077
- Condition: Smoke
- Location: Avionics
- Part time: 11,794 hours, 4,173 cycles
- Stage of operation: CR
- How discovered: O
- Nature of condition: B, J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/YENA200550

## Discrepancy

AT FL 360 RECEIVED AFT AVIONICS COMPARTMENT SMOKE WARNING WITH A RED LIGHT SMOKE INDICATION WITH A HORN ON THE OVERHEAD PANEL; THIS HAD NO ASSOCIATED ECAM.  SILENCED THE ALARM, AND QRH PROCEDURE CATRRIED OUT.  AFTER COMPLETION OF QRH PROCEDURE THE RED LIGHT REMAINED AND THE HORN SOUNDED A SECOND TIME.  CAPTAIN DECLARED EMERGENCY AND MADE A UNEVENTFUL UNSCHEDULED LANDING AT OKC. VISUAL INSPECTION OF AFT AVIONICS RACK REVEALED NO DEFECT.  REMOVED AND REPLACED AFT AVIONICS RACK COOLING FAN ASSY, OPERATION CHECK NORMAL PER LTV AMM 23-39-00.

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