# SDR UIEA2023041800371

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 17, 2023
- Submitted: April 21, 2023
- Operation: Air carrier
- Aircraft: [N408MC](https://openairdocs.org/aircraft/N408MC), registered now
- Make and model: Boeing 747-47UF
- Registry model: [Boeing 747-47UF](https://openairdocs.org/model/boeing-747-47uf) (OpenAirDocs)
- Aircraft serial: 29261
- Aircraft time: 94,195 hours, 15,862 cycles
- System (JASC): [2100 · Air Conditioning System](https://openairdocs.org/jasc/2100)
- Part: Coalescer Bag
- Part number: NA
- Part serial: NSN
- Condition: Unknown
- Location: Unknown
- Stage of operation: LD
- How discovered: V
- Nature of condition: B, O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UIEA2023041800371

## Discrepancy

DURING LANDING WITH REVERSE THRUST, EICAS SMOKE CREW REST APPEARED. HAZE NOTICED IN UPPER DECK. DISSIPATING SLOWLY AFTER REVERSERS STOWED. SUSPECT AIR CONDITIONING SYSTEM CONTAMINATION.(<P>REMOVED #3 PACK COALESCER BAG PER AMM 21-51-05-002-018 AND INSTALLED NEW COALESCER BAG PER AMM 21-51-05-400-801. OPERATED PACK 3 PER AMM 21-51-00/601, OPS CHECK GOOD AND NO VISIBLE HAZE NOTED.</P>)

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