# SDR YENA2026070700520

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 2, 2026
- Submitted: July 7, 2026
- Operation: Air carrier
- Aircraft: [N923JB](https://openairdocs.org/aircraft/N923JB), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 05960
- Aircraft time: 50,476 hours, 9,891 cycles
- System (JASC): [4990 · APU Oil System](https://openairdocs.org/jasc/4990)
- Part: Oil System
- Condition: Leaking
- Location: Apu
- Stage of operation: DE
- 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/YENA2026070700520

## Discrepancy

FLT #316, SFO-JFK. DIRTY SOCK SMELL OUTOF 20,000 ON DESCENT IN FORWARD SECTION OF AIRCRAFT APU OFF.; PER INFO NOTICE 2017-TO15M PERFORMED VISUAL INSP. OF APU FOUND SIGNS OF OIL ON AIR INLET. SURROUNDINGS. REF LOG PAGE 472187 ITEM 2.REF EC NO. A4917122-01 FOR STEAM CLEANING OF APU ENGINE AIR DUCTS, AND APU COMPARTMENT ACCOMPISHED. ALL EVIDENCE OF OIL CLEANED DURING PROCEDURE AND APU RAN FOR 15 MINS REF AMM 49-00-00. NO LEAKS NOTED. PERFORMED LEVEL B DECONTAMINATION IAW INFO NOTICE 2017-T015M & AMM 21-00-00

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