# SDR CALA2025070806315

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 7, 2025
- Submitted: July 8, 2025
- Operation: Air carrier
- Aircraft: [N78438](https://openairdocs.org/aircraft/N78438), registered now
- Make and model: Boeing 737924ER
- Aircraft serial: 33533
- Aircraft time: 50,640 hours, 18,036 cycles
- System (JASC): [4920 · APU Core Engine](https://openairdocs.org/jasc/4920)
- Part: Inlet
- Condition: Contaminated
- Location: Apu
- Stage of operation: IN
- How discovered: O
- Nature of condition: B
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2025070806315

## Discrepancy

APU BLEED AIR EXHAUST SMELL IN CABIN ODOR.  T/S REF FIM 49-55 TASK 801. PERFORMED VISUAL INSPECTION OF APU AND FOUND RESIDUAL OIL NEAR AIR INLET DUCT. CLEANED AREA THOROUGHLY AND RAN APU WITH BLEED FOR APPROXIMATELY 1 HOUR. COULD NOT REPLICATE ODOR IN AIR. VERIFIED NO LEAKS DURING OPERATION OF APU.

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