# SDR DALA2026081904741

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 16, 2026
- Submitted: August 20, 2026
- Operation: Air carrier
- Aircraft: [N848DN](https://openairdocs.org/aircraft/N848DN), registered now
- Make and model: Boeing 737932ER
- Aircraft serial: 31959
- Aircraft time: 34,021 hours, 13,457 cycles
- System (JASC): [4950 · APU Bleed Air System](https://openairdocs.org/jasc/4950)
- Part: O-Ring
- Condition: Leaking
- Location: Apu
- 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/DALA2026081904741

## Discrepancy

DURING TAXI IN SMELLED STRONG FUMES IN THE FLIGHT DECK. MAINTENANCE OBSERVED A LOT OF SMOKE FROM L ENG. NO OBSERVED ENGINE ABNORMAL READINGS, PACKS WERE GETTING AIR FROM APU WHEN ODORS BEGAN.  REMOVED LPT FLANGE ASSY IAW AMM 72-56. GVI EXPOSED AREAS. INSTALLED LPT FLANGE ASSY IAW AMM 72-56-00. INSTALLED EXHAUST PLUG & NOZZLE ASSY IAW AMM 78-11. REMOVED CVT O-RING  ESM REV 66.01 72-55, INSTALLED CVT O-RING CFM56-7B 72-55 ESM. INSTALLED LPT PLUG FWD. & AFT CONES AMM 72-55. (8824736) AIRCRAFT WAS GROUNDED

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