# SDR DALA2026040902259

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 8, 2026
- Submitted: April 9, 2026
- Operation: Air carrier
- Aircraft: [N337DN](https://openairdocs.org/aircraft/N337DN), registered now
- Make and model: Airbus A321-213
- Registry model: [Airbus A321-213](https://openairdocs.org/model/airbus-a321-213) (OpenAirDocs)
- Aircraft serial: 8080
- Aircraft time: 24,560 hours, 11,086 cycles
- Engine: Cfmint CFM565B2
- System (JASC): [7320 · Fuel Controlling System](https://openairdocs.org/jasc/7320)
- Part: Hmu
- Condition: Leaking
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DALA2026040902259

## Discrepancy

FA IN AFT GALLEY AND AT 3R EXIT SMELLED HEAVY GASOLINE FUMES ON INITIAL PUSH AND ENGINE START-REPORTED SAME TO FLT DECK ARRANGED RETURN TO GATE FOR MAINT INSPECTION BOTH ENGINES RUNNING APU OFF FLAPS SET 1 AND ECON FLOW PUSHED FOR LOW PAX LOAD SMELL DISSIPATED QUICKLY NO SMELL ON RETURN TO GATE.  FOUND FUEL COMING FROM HMU DRAIN. REPLACED HMU PER A321 AMM 73-21. RECONNECT DRAIN LINES. (LP 7633054, 7633060 - AIRCRAFT WAS GROUNDED)

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