# SDR DALA2026052303125

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 23, 2026
- Submitted: May 23, 2026
- Operation: Air carrier
- Aircraft: [N542DE](https://openairdocs.org/aircraft/N542DE), registered now
- Make and model: Airbus A321-271NX
- Registry model: [Airbus A321-271NX](https://openairdocs.org/model/airbus-s-a-s-a321-271nx) (OpenAirDocs)
- Aircraft serial: 11510
- Aircraft time: 11,756 hours, 2,869 cycles
- System (JASC): [2910 · Hydraulic System, Main](https://openairdocs.org/jasc/2910)
- Part: Drain Valve
- Condition: Leaking
- Location: Hyd Sys
- Stage of operation: NR
- How discovered: O
- Nature of condition: K, J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DALA2026052303125

## Discrepancy

AIRCRAFT 5042, JUST BEFORE TOP,  SMELL PLASTIC (BURNING) DID FUME SMOKE CHECKLIST AFTER ISOLATING CABIN FANS, GALY & CAB, VENTILATION. ODOR WENT AWAY. RESTORED VENTILATION-ODOR CAME BACK. OVRD VENTILATION WAS RESELECTED.  ODOR WENT AWAY IN CKPT. CABIN STILL SMELLED FUMES BY LANDING SMELL WENT AWAY IN CABIN.    FOUND GN SYS RESERVOIR DRAIN VALVE LEAKING HYD FLUID & INGESTED INTO APU INLET. REPLACED LEAKING GREEN HYD RESERVOIR DRAIN VALVE IAW AMM 29-12. (LP 8538690 - AIRCRAFT WAS GROUNDED)

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