# SDR CALA2026080518278

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 4, 2026
- Submitted: August 5, 2026
- Operation: Air carrier
- Aircraft: [N86534](https://openairdocs.org/aircraft/N86534), registered now
- Make and model: Boeing 737824
- Aircraft serial: 62750
- Aircraft time: 31,056 hours, 11,797 cycles
- Engine: Cfmint CFM567B27
- System (JASC): [2120 · Air Distribution System](https://openairdocs.org/jasc/2120)
- Part: Air Filter
- Part number: 21FA407G
- Condition: Faulty
- Location: Rh Recirculation
- Stage of operation: DE
- How discovered: O
- Nature of condition: B
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2026080518278

## Discrepancy

STRONG DIRTY ODOR FROM AIR CON,  STARTED AROUND 15K FT & LASTED UNTIL LANDING.  FOUND OIL PUDDLE IN AFT TURBINE SECTION ON NR 1 ENGINE. PERFORM CONDITION INSP IAW AMM 05-51-26-800-801 -C1 ODOR STILL PRESET NOT AS STRONG WITH RT PACK OFF,  NO SMOKE ODOR.  ABSERVED RT PACK TEMP 90C. REPLACED RT RECIRCULATION AIR FILTER IAW AMM 21-25-01-400-801. AWAITING ENGINE RUN. CHECKING RT PACK ON, ODOR PRESENT, WITH RT PACK OFF, NO ODOR PRESENT, WITH LT PACK ON, NO ODOR PRESENT.

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