Service difficulty report · Circuit Breaker · Cvac 440

Difficulty date
January 24, 2011
Submitted
January 26, 2011
Operation
General aviation
Aircraft
N39
Make and model
Cvac 440
Aircraft serial
480
Aircraft time
21,841 hours, 15,023 cycles
Engine
Allsn 501D13D
Part
Circuit Breaker
Part number
D6760135
Condition
Failed
Location
Hyd System
Part time
1,876 hours, 1,394 cycles
Stage of operation
TX
How discovered
O
Nature of condition
B
Precautionary procedure
O

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

What was found

ON START UP, THE FLIGHT CREW APPLIED AC POWER TO ACFT AND TURNED AC HYD PUMP SWITCH ON. A SMALL FLASH, THEN SMOKE EMITTED AT THE CIRCUIT BREAKER. THE FORWARD FACE DISINTEGRATED INTO FRAGMENTS.