SDR UALA2011011700273

Service difficulty report · Engine · Boeing 777222

Difficulty date: January 17, 2011
Submitted: February 25, 2011
Operation: Air carrier
Aircraft: N773UA
Make and model: Boeing 777222
Aircraft serial: 26929
Aircraft time: 62,818 hours, 12,327 cycles
Engine: Pwa PW4077
Engine time: 52,830 hours, 12,271 cycles
System (JASC): 7200 · Engine (Turbine/Turboprop)
Part: Engine
Part number: PW4077
Part serial: 777009
Condition: Surges
Location: Nr 1
Part time: 52,830 hours, 12,271 cycles
Stage of operation: CR
How discovered: O
Nature of condition: R, J
Precautionary procedure: O

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

What was found

NR 1 ENGINE SILENT SURGE. ACCOMPLISHED VISUAL CHECKS OF INLET, EXHAUST, 2.5 BLEED OPENING AT 6 O'CLOCK & 2.9 BLEED SCREEN AT 2 O'CLOCK CHECKED FOR SIGNS OF DAMAGE OR DEBRIS. ACCOMPLISHED BOROSCOPE OF HPC STAGES 5, 6, 8, 9,14 & 15. ACCOMPLISHED ALL VISUAL ENGINE CHECKS, NO DAMAGE OR DEBRIS. NO LIMITING DEFECTS NOTED.