# SDR YENA201909170537

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 17, 2019
- Submitted: September 20, 2019
- Operation: Air carrier
- Aircraft: [N954JB](https://openairdocs.org/aircraft/N954JB), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 6725
- Aircraft time: 16,629 hours, 5,411 cycles
- System (JASC): [2120 · Air Distribution System](https://openairdocs.org/jasc/2120)
- Part: Unknown
- Condition: Smoke
- Location: Cockpit
- Stage of operation: CR
- 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/YENA201909170537

## Discrepancy

FLT 1304, SJU-JFK. RETURNED TO FIELD. SMOKE IN COCKPIT AFTER AUDIBLE POP IN AVIONICS COMPT.  SMOKE CLEARED AFTER SEVERAL MOMENTS; ACCOMPLISHED CH 5 INSP PER TSM 05-50-00-810-831.  CHECKED ALL 3 AVIONICS COMPTS.  CK'D ALL C/B'S FOR POPPING; CK'D BLOWER & EXTRACT FANS FOR SMELL OR VIBRATION.  REMOVED AND INSP'D BLOWER FAN PER AMM 21-26-51.  NO IDENTIFIABLE FAULTS OR SOURCE OF SMELL NOTED.  NO PRIOR HISTORY.  ACCOMPLISHED AEVC TEST.  A/C OK FOR SERVICE.  NOTIFIED MCC. AS PRECAUTIONARY, PLACED BLOWER FAN ON MEL 21-26-01-A CAT C MX4 UPDATED.  PLACARD INSTALLED PER MCC.

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