SDR FDEA201512194044

Service difficulty report · Switch · Doug MD11F

Difficulty date: December 19, 2015
Submitted: December 21, 2015
Operation: Air carrier
Aircraft: N616FE
Make and model: Doug MD11F
Aircraft serial: 48747
Aircraft time: 64,990 hours, 15,597 cycles
System (JASC): 2120 · Air Distribution System
Part: Switch
Condition: Malfunctioned
Location: Cockpit
Stage of operation: CR
How discovered: O
Nature of condition: J
Precautionary procedure: A

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

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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