SDR 2001UALA02394

Service difficulty report · Computer · Boeing 777222

Difficulty date: December 8, 2001
Submitted: January 2, 2002
Operation: Air carrier
Aircraft: N786UA
Make and model: Boeing 777222
Aircraft serial: 26938
Aircraft time: 21,392 hours, 3,328 cycles
Engine: Pwa PW4090
System (JASC): 3140 · Central Computers
Part: Computer
Condition: Malfunctioned
Location: Right
Stage of operation: NR
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

ACFT RETURNED TO STAND WITH RIGHT ENGINE BLEED PROBLEM. NO STATUS MESSAGE. CONFIRMED RIGHT ENGINE PRSOV NOT OPERATING CORRECTLY. FOUND IOM 004 MODULE IN THE RIGHT AIMS SHOWING HARD FAULT. RESET AIMS MODULE AND SWAPPED RIGHT AIMS IOM 009 WITH RIGHT AIMS IOM 004 FOR TROUBLESHOOTING. ALL MESSAGES CLEARED. PERFORMED ENG RUN PER JRH. BLEED OPS NORMAL. RESET OF AIMS CORRECTED THE PROBLEM OF NO STATUS MESSAGE. NO AIMS PARTS WERE REPLACED.