# SDR UIEA2023121500999

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 15, 2023
- Submitted: December 18, 2023
- Operation: Air carrier
- Aircraft: [N454PA](https://openairdocs.org/aircraft/N454PA), registered now
- Make and model: Boeing 747-46NF
- Registry model: [Boeing 747-46NF](https://openairdocs.org/model/boeing-747-46nf) (OpenAirDocs)
- Aircraft serial: 30812
- Aircraft time: 89,508 hours, 15,073 cycles
- System (JASC): [2170 · Humidity Control System](https://openairdocs.org/jasc/2170)
- Part: Water Separator
- Part number: 25TD47
- Part serial: NSN
- Condition: Unknown
- Location: Unknown
- Stage of operation: TO
- 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/UIEA2023121500999

## Discrepancy

SMOKE CREW REST EICAS IMMEDIATELY AFTER ROTATION AND A SMELL OF SOMETHING BURNING. EICAS AND SMELL WENT AWAY AFTER 1-2 MINUTES. REPEAT WRITE-UP, REF LP 1723752.(<P>NO FAULTS FOUND IN CMC. PERFORMED FIRE SET SYS GROUND TEST PER AMM 26-11-00, TEST PASS. PERFORMED CONDITIONAL INSPECTION PER AMM 05-51-56, NO DEFECTS NOTED OR FOUND. REMOVED AND REPLACED #1 PACK WATER SEPARATOR COALESCER BAG PER AMM 21-51-05/201, OPS CHECK GOOD.</P>)

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