Service difficulty report · Circuit Breaker · Boeing 747122

Difficulty date
December 6, 1995
Submitted
March 26, 2000
Operation
Air carrier
Aircraft
N4729U
Make and model
Boeing 747122
Aircraft serial
19926
Engine
Pwa JT9D7A
Part
Circuit Breaker
Part number
2TC1415
Condition
Failed
Location
Galley
Stage of operation
UK
Nature of condition
A
Precautionary procedure
H, F

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

What was found

SMOKE, SPARKS AND FLAMES SEEN FROM COFFEE MAKER AT GALLEY 411. EXTINGUISHER USED AND CIRCUIT BREAKERS WERE PULLED. REPLACED FAILED CIRCUIT BREAKER AND ENTREE CART POWER CORD. CAUSE OF FAILURE NOT DETERMINED. POSSIBLE CAUSE: OVERCYCLING OF CIRCUIT BREAKER WHILE OPERATING IT AS ON-OFF SWITCH.