# SDR FDEA201512194044

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 19, 2015
- Submitted: December 21, 2015
- Operation: Air carrier
- Aircraft: [N616FE](https://openairdocs.org/aircraft/N616FE), registered now
- Make and model: Doug MD-11F
- Registry model: [Doug MD-11F](https://openairdocs.org/model/mcdonnell-douglas-md-11f) (OpenAirDocs)
- Aircraft serial: 48747
- Aircraft time: 64,990 hours, 15,597 cycles
- System (JASC): [2120 · Air Distribution System](https://openairdocs.org/jasc/2120)
- Part: Switch
- Condition: Malfunctioned
- Location: Cockpit
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/FDEA201512194044

## Discrepancy

ENROUTE, AT :50 MINUTES INTO FLIGHT, RECEIVED LVL 2 AVIONICS AIR FLOW OFF.  AS SOON AS QRH WAS REFERENCED LVL 2 WENT OUT.  CONTROLLER PUT AVIONICS FAN IN OVERRIDE.  WHEN THAT HAPPENED LVL 2 WENT OUT, LVL 1 AVIONICS FAN OVRD ON.  SAT COMM WITH GOC & MX.  AIR TURN BACK.  INSTALLED REPAIRED DUCT IAW SMP & REPLACED AVIONICS COMPARTMENT OVERHEAT SWITCH IAW AMM 21-62-22-5.

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