SDR USAA2011121200021

Service difficulty report · Circuit Breaker · Boeing 7572B7

Difficulty date: December 11, 2011
Submitted: December 12, 2011
Operation: Air carrier
Aircraft: N939UW
Make and model: Boeing 7572B7
Aircraft serial: 27303
System (JASC): 2460 · DC Power Distribution System
Part: Circuit Breaker
Condition: Popped
Location: Cockpit
Stage of operation: DE
How discovered: O
Nature of condition: J
Precautionary procedure: O

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

What was found

PHL - FLT 751 EN ROUTE BRU TO PHL. ON DESCENT, THE FLIGHT DECLARED AN EMERGENCY DUE TO EICAS MESSAGES "APU BLEED VAL", "L HYD ELE PUMP", "C HYD ELE 2", "ANTI-SKID", "PROBE HEAT", "RT UTIL BUS OFF", "R RECIRC FAN", AND "L ENG EEC". THE CIRCUIT BREAKER FOR THE RIGHT DC BUS SECT 1 WAS THEN FOUND POPPED. THE FLIGHT LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE RESET THE DC BUS SECT 1 CIRCUIT BREAKER. OPERATIONALLY CHECKS NORMAL. NO FAULTS WERE NOTED.

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