# SDR DALA2022050203095

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 27, 2022
- Submitted: May 2, 2022
- Operation: Air carrier
- Aircraft: [N672DL](https://openairdocs.org/aircraft/N672DL), registered now
- Make and model: Boeing 757232
- Aircraft serial: 25977
- Aircraft time: 93,878 hours, 40,983 cycles
- System (JASC): [4990 · APU Oil System](https://openairdocs.org/jasc/4990)
- Part: Bleed Air Sys
- Condition: Contaminated
- 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/DALA2022050203095

## Discrepancy

SHIP 672 FAINT MUSTY SMELL IN COCKPIT AT CRUISE. OCCURRED AGAIN INITIAL DESCENT. CORRECTIVE ACTION: C/W NO ODI PREVENTION PROGRAM. T/S PER B757 FIM 21-00-01/301 AND ENCOUNTERED THICK BLACK OIL SOOT IN APU BLEED DUCT WITH NO VISIBLE OIL LEAKS ON APU AND APU OIL LEVEL AT MINIMUM. R/R APU REF AMDS W/C. OPS AND LEAK CKS GOOD. C/W REMOVAL OF OIL CONTAMINATION OF AIR CONDITIONING AND PNEUMATIC SYSTEM PER B757 AMM 21-00. C/W CAPTURE AND REPORT ODI FOLLOW UP INFORMATION PER WC. (8481353)

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