SDR DALA1010886307

Service difficulty report · Interface Unit · Boeing 747451

Difficulty date: May 23, 2010
Submitted: May 24, 2010
Operation: Air carrier
Aircraft: N667US
Make and model: Boeing 747451
Aircraft serial: 24222
Aircraft time: 87,227 hours, 10,700 cycles
Engine: Pwa PW4056
System (JASC): 3140 · Central Computers
Part: Interface Unit
Condition: Malfunctioned
Location: Efis/Eicas
Stage of operation: CL
How discovered: O
Nature of condition: N
Precautionary procedure: A

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

What was found

AFTER TAKEOFF, FLIGHT CREW RECEIVED MUTABLE MESSAGES ON UPPER EICAS: CABIN ALT AUTO, HYD CONTROL 4, PACK 1, PACK 2, PACK 3, FUEL TEMP, FUEL JETT B, WINDSHEAR, GRD PROX SYS, ALT CALLOUTS APPEARED. EICAS CROSSFEED VALVE INDICATIONS AND FUEL FLOW PICTORIALS ALSO ABSENT. DIVERTED FOR MX. MX REPLACED THE EFIS/EICAS INTERFACE UNIT. ALL MESSAGES CLEARED. RAN ENGINES AND ALL OPERATIONS/INDICATIONS WERE NORMAL.