# SDR CALA2026070517536

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 3, 2026
- Submitted: July 6, 2026
- Operation: Air carrier
- Aircraft: [N33714](https://openairdocs.org/aircraft/N33714), registered now
- Make and model: Boeing 737724
- Aircraft serial: 28785
- Aircraft time: 85,378 hours, 31,865 cycles
- System (JASC): [2120 · Air Distribution System](https://openairdocs.org/jasc/2120)
- Part: Filter
- Part number: 21FA407G
- Condition: Odor
- Location: Zone 100
- 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/CALA2026070517536

## Discrepancy

ODOR IN AFT CABIN AT  CRUISE SDR ADDED. UPDATED WITH FORM REF LP 9479753 FOR CORRECTIVE ACTION PERFORM SMOKE/ODOR IN THE FLIGHT DECK/CABIN - CONDITIONAL INSPECTION PER AMM 05-51-26-800-801-C1 PERFORMED SMOKE AND ODOR INSPECTION, RAN BOTH ENGINES, PACKS AND APU NO SMELLS NOTED REF AMM 05-51-26. REMOVED AND REPLACED RECIRCULATION FILTER REF AMM 21-25-01. RAN ENGINES AGAIN, AND VERIFIED NO SMOKE OR ODOR IN CABIN. AIRCRAFT IS OK FOR SERVICE.

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