# SDR DALA2022042202836

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 20, 2022
- Submitted: April 22, 2022
- Operation: Air carrier
- Aircraft: [N672DL](https://openairdocs.org/aircraft/N672DL), registered now
- Make and model: Boeing 757232
- Aircraft serial: 25977
- Aircraft time: 93,839 hours, 40,961 cycles
- System (JASC): [4990 · APU Oil System](https://openairdocs.org/jasc/4990)
- Part: Filter
- Condition: Odor
- Stage of operation: IN
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DALA2022042202836

## Discrepancy

SHIP 672 MUSTY SMELL COMING FROM AIR CONDITIONING. CORRECTIVE ACTION: OPENED FWD B/B AND REMOVED BOTH RECIRC FAN FILTERS. IAW B757 AMM 21-25 SIGNATURE 889347. INSTALLED BOTH RECIRC FAN FILTERS PER B757 AMM 21-25. REF LOG 2202788. FOUND SIGNS OF OIL CONTAMINATION IN APU, R/R APU ON LOG 2203438.

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