# SDR IPXA2025091628055

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 16, 2025
- Submitted: September 16, 2025
- Operation: Air carrier
- Aircraft: [N284UP](https://openairdocs.org/aircraft/N284UP), registered now
- Make and model: Doug MD-11F
- Registry model: [Doug MD-11F](https://openairdocs.org/model/mcdonnell-douglas-md-11f) (OpenAirDocs)
- Aircraft serial: 48541
- Aircraft time: 76,632 hours, 16,726 cycles
- System (JASC): [2170 · Humidity Control System](https://openairdocs.org/jasc/2170)
- Part: Coalescer Bag
- Part number: 20D103
- Part serial: LOT20D103
- Condition: Odor
- Location: Zone 100
- Stage of operation: NR
- How discovered: O
- Nature of condition: B
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/IPXA2025091628055

## Discrepancy

NOTICED AN ODOR AT 11,000 FT DISSIPATED AT 15,000 FT FO SAID IT SMELLED LIKE BURNING RUBBER.   REMOVED AND REPLACED NR 2 PACK WATER SEPARATOR CONICAL COALESCER IAW AMM 21-54-04, LEAK CHECK GOOD. DURING ENGINE RUN ISOLATED NR 2 PACK FOR 5 MINS WITH NO NOTABLE ODOR. ALSO ISOLATED NR 1 AND 3 PACKS INDEPENDENTLY WITH NO NOTICEABLE ODOR. ACFT GOOD FOR CONTINUED USE.

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