# SDR DALA2026011400343

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 10, 2026
- Submitted: January 14, 2026
- Operation: Air carrier
- Aircraft: [N133DU](https://openairdocs.org/aircraft/N133DU), registered now
- Make and model: Airbus BD-500-1A10
- Registry model: [Airbus BD-500-1A10](https://openairdocs.org/model/airbus-canada-ltd-ptnrsp-bd-500-1a10) (OpenAirDocs)
- Aircraft serial: 50052
- Aircraft time: 13,297 hours, 6,147 cycles
- System (JASC): [4990 · APU Oil System](https://openairdocs.org/jasc/4990)
- Part: Oil System
- Condition: Leaking
- Location: Apu
- Stage of operation: TX
- How discovered: O
- Nature of condition: K, B
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DALA2026011400343

## Discrepancy

AFTER STARTING BOTH ENGINES AND APU OFF REAR FA CALLED AND REPORTED DIRTY SOCKS SMELL. SMELL REMAINED AFTER SHUTTING RIGHT ENGINE DOWN. C/W SMOKE/FUME WC 0550-2001. P TRAK GRAPH INDICATED APU IS THE SOURCE. CONTINUED WITH WC 0550-2002 WITH NO FINDINGS. INSPECTED TAIL CONE AND APU TURBINE BLADES WITH BLACK LIGHT AND APPEARS OIL IS LEAKING AT 6 O'CLOCK STRUT (176559) R/R CABIN RECIRC FILTERS PER A220 AMP 21-22. C/W ECS DECONTAMINATION PER AMDS WORKCARD 0550-2003. C/W CAPTURE AND REPORT ODI FOLLOW UP PER WORKCARD 0550-9001-A220. (LP# 7598846)

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