# SDR DALA2020091543075

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 14, 2020
- Submitted: September 15, 2020
- Operation: Air carrier
- Aircraft: [N912DU](https://openairdocs.org/aircraft/N912DU), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 64883
- Aircraft time: 5,026 hours, 2,049 cycles
- System (JASC): [2120 · Air Distribution System](https://openairdocs.org/jasc/2120)
- Part: Unknown
- Condition: Odor
- Location: Cockpit
- Stage of operation: TO
- 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/DALA2020091543075

## Discrepancy

DURING TAKE OFF AND IN DESCENT HAD AN OILY/DIRTY SMELL.  ODOR WAS ONLY IN FLIGHT DECK.  INSPECTED BLEED DUCT W/ BLACK LIGHT, NO OIL CONTAMINATION FOUND.  INSPECTED NR 1 AND NR 2 ENGINE FAN AND HOT SECTION, NO OIL FOUND.  R & R RECIRC FAN FILTERS, PER AMM 21-25-01.  PERFORMED DUCT BURN, PER AMM 21-00-01.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.