# SDR SWAA2023062242695

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 27, 2023
- Submitted: June 22, 2023
- Operation: Air carrier
- Aircraft: [N8631A](https://openairdocs.org/aircraft/N8631A), registered now
- Make and model: Boeing 737-8H4
- Registry model: [Boeing 737-8H4](https://openairdocs.org/model/boeing-737-8h4) (OpenAirDocs)
- Aircraft serial: 42385
- Aircraft time: 30,380 hours, 14,192 cycles
- System (JASC): [2121 · Air Distribution Fan](https://openairdocs.org/jasc/2121)
- Part: Fan
- Condition: Odor
- Location: Zn 100 Fus Lower
- Stage of operation: AP
- How discovered: 9
- Nature of condition: B
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA2023062242695

## Discrepancy

DURING DESCENT INTO STL ABOUT 15 MIN OUT A FA RELAYED TO US PILOTS THAT SOME PAX SMELLED LIKE A MATCH WAS LIT SOMEWHERE IN THE CABIN. ABOUT THIS TIME I WAS AT 290 KTS AND MY CDU DISPLAYED DRAG REQUIRED . SO I EXTENDED THE SPEED BRAKES OUT TO JUST SHORT OF THE FLIGHT DETENT MARK SHORTLY THEREAFTER THE FA RELAYED THAT THE SMELL DISSIPATED BUT THERE WAS NOW A HIGH PITCHED GRINDING NOISE EMANATING FROM UNDER THE FLOOR NEAR ROW 13 ON FO SIDE. WE FLEW A NORMAL APPROACH AND LANDING WITHOUT ANY ABNORMAL INDICATIONS SOUNDS OR FEEL<[01] PERFORMED CONDITIONAL INSPECTION PER AMM 05-51-56 T/S PER FIM TASK 21-00 TASK 806 FOUND RH RECIRC FAN GRINDING OK TO CONTINUE PER MEL 21-31-04 SP1 SP2;[02] REMOVED & REPLACED RH RECIRC FAN IAW AMM 21-25-02; LEAK & OPS CHECK GOOD.

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