# SDR DALA2023101908603

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 15, 2023
- Submitted: October 19, 2023
- Operation: Air carrier
- Aircraft: [N820DN](https://openairdocs.org/aircraft/N820DN), registered now
- Make and model: Boeing 737932ER
- Aircraft serial: 31931
- Aircraft time: 31,120 hours, 12,041 cycles
- System (JASC): [4990 · APU Oil System](https://openairdocs.org/jasc/4990)
- Part: Cooler
- Part number: UNKNOWN
- Condition: Leaking
- Location: Unknown
- 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/DALA2023101908603

## Discrepancy

(LOG 4508698) VERY MILD "DIRTY SOCK" SMELL OCCURED ON TAXI-OUT DURING START OF THE LEFT ENGINE. SMELL RETURNED MUCH STRONGER AT 100 KNOTS ON THE TAKEOFF ROLL. SMELL WAS GONE BY 1,500 AGL. APU OIL COOLER LINE LEAK. R&R APU OIL COOLER PER B737 AMM 49-91. OPS TEST GOOD. LEAK CHECK GOOD.

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