SDR WRNA201200015

Service difficulty report · Control Unit · Doug MD11F

Difficulty date: November 16, 2012
Submitted: December 13, 2012
Operation: Air carrier
Aircraft: N953AR
Make and model: Doug MD11F
Aircraft serial: 48520
Aircraft time: 48,950 hours, 12,588 cycles
System (JASC): 2450 · AC Power Distribution System
Part: Control Unit
Condition: Malfunctioned
Location: Electrical Sys
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

WHILE IN FLIGHT, LEVEL 2 "GEN BUS 3 FAULT" ILLUMINATED. DEPLOYED ADG AND RETURNED TO FIELD (MIA) FOR SAFE LANDING. REPLACED EPCU IAW AMM 24-08-01, GROUND RUN ENGINES, NO DEFECTS NOTED. STOWED ADG IAW AMM 24-25-01. AIRCRAFT RETURNED TO SERVICE.

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