# SDR UIEA2018090701914

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 6, 2018
- Submitted: September 7, 2018
- Operation: Air carrier
- Aircraft: [N493MC](https://openairdocs.org/aircraft/N493MC), registered now
- Make and model: Boeing 747-47UF
- Registry model: [Boeing 747-47UF](https://openairdocs.org/model/boeing-747-47uf) (OpenAirDocs)
- Aircraft serial: 29254
- Aircraft time: 82,474 hours, 13,246 cycles
- System (JASC): [2121 · Air Distribution Fan](https://openairdocs.org/jasc/2121)
- Part: Cooling Fan
- Part number: 4100749C
- Part serial: 0928
- Condition: Malfunctioned
- Location: E&E Bay
- Stage of operation: CR
- How discovered: O
- Nature of condition: B, J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UIEA2018090701914

## Discrepancy

REPEAT WRITE UP- " EQUIP COOLING" EICAS MSG CAME ON. 30 MINUTES INTO FLT WITH AN ASSOCIATED " EQUIPMENT SMOKE" STATUS MSG. WENT TO OVRD PER CHECKLIST AND (CONT) "EQUIP COOLING" MSG WENT OUT. CONTINUED TO ORD. T/S PER FIM 21-50- FOUND E&E COOLING SUPPLY FAN AT FAULT. R&R EQUIPMENT COLING FAN IAW AMM 21-58-01. LEAK CHECK AND OPS CHKD NORMAL AT THIS TIME. CMC GRD TEST PERFORMED- TEST PASSED.

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