Service difficulty report · Guide · Boeing 747433

Difficulty date
December 1, 2002
Submitted
January 6, 2003
Operation
Air carrier
Make and model
Boeing 747433
Aircraft time
39,815 hours
Engine
Pwa PW4056
Part
Guide
Part number
669236
Condition
Failed
Location
Connector Plug
Stage of operation
IN
How discovered
V
Nature of condition
W, B
Precautionary procedure
K

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

What was found

(CAN) STRONG ELECTRICAL BURNING ODOR IN COCKPIT AFTER EXTERNAL POWER APPLIED. INVESTIGATION REVEALED THAT ONE PHASE OF THE GPU PLUG WAS APPLIED TO THE NEUTRAL WIRE OF THE RECEPTACLE. THIS IS POSSIBLE TO DO IF THE PLUG IS INSERTED INCORRECTLY AND A RESET IS SELECTED ON THE GPU. ALSO IT IS POSSIBLE TO INSTALL THE PLUG OFFSET HORIZONTALLY AND VERTICALLY. OUR FIX AND WITH OUR PREVIUOUS INCIDENT OF THE SAME NATURE A YEAR AGO, WE ARE GOING TO INSTALL A MORE RIGID GUIDE , THE SAME AS THE 767 WITH NO CUT OUT.