Service difficulty report · Wire · Bombdr BD7001A10

Difficulty date
April 27, 2011
Submitted
September 9, 2011
Operation
Air carrier
Make and model
Bombdr BD7001A10
Engine
Rroyce BR700710A110
Part
Wire
Condition
Misinstalled
Location
Spda
Part time
28 hours
Stage of operation
NR
How discovered
9
Nature of condition
W
Precautionary procedure
O

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

What was found

THE DC POWER EMERGENCY OVERRIDE TEST HAS REVEALED THAT THE RMU NR 1 WAS NOT SHOWING ANY DASHES WHEN TRANSFERRED IN DC POWER EMERGENCY OVERIDE MODE. AFTER SEARCHING FOR THE FAILURE, DISCOVERED THAT THE SPDA DC ESS LOADS AND SPDA DC 2 LOAD WIRES WERE INVERT WHICH DID NOT GIVE ACCURATE REDUNDANCY LEVEL IN CASE OF GENERATOR FAILURE. THE WIRES REFERRED ARE THE SAME GAUGE AND THE TERMINALS ARE THE SAME DIMENSION. WIRE IDENTIFICATION OF SPDA DC ESS LOADS SCG0002-10 (T17) AND SPDA DC2 LOADS SAP0001-10 (T13) IN THEIR RESPECTIVE POSITION ACCORDINGLY TO THE AWD.