# SDR DALA2022012000403

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 18, 2022
- Submitted: January 20, 2022
- Operation: Air carrier
- Aircraft: [N139DU](https://openairdocs.org/aircraft/N139DU), registered now
- Make and model: Bombdr BD1001A10
- Aircraft serial: 50058
- Aircraft time: 2,502 hours, 1,155 cycles
- System (JASC): [4920 · APU Core Engine](https://openairdocs.org/jasc/4920)
- Part: Apu
- Condition: Odor
- Stage of operation: IN
- How discovered: 9
- Nature of condition: B
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DALA2022012000403

## Discrepancy

STRONG DIRTY SOCK SMELL + ODOR ONLY WHEN APU RUNNING ON GROUND.DISSIPATES WHEN APU SHUT DOWN. PERFORMED NO GO ODI PREVENTION STEPS PER WORK CARD 0550-2001 + EFIM SMELL OF SMOKE OR FUMES WITH APU AS SOURCE. PERFORMED DUCT BURNOUT + REPLACED BOTH RECERC FILTERS. NO FUMES NOTED. OK FOR SERVICE. REF TASK BD500-A-J21-22-03-01AAA-720A-A. (LP# 7902866)

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