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SDR UALA2012082804825

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Service difficulty report · Engine · Boeing 767322

FAA SDR system

Difficulty date
August 25, 2012
Submitted
September 24, 2012
Operation
Air carrier
Aircraft
N657UA
Make and model
Boeing 767322
Aircraft serial
27112
Aircraft time
84,734 hours, 13,476 cycles
Engine
Pwa PW4060
Engine time
87,145 hours, 12,933 cycles
System (JASC)
7200 · Engine (Turbine/Turboprop)
Part
Engine
Condition
Surges
Location
Nr 2
Stage of operation
DE
How discovered
O
Nature of condition
O
Precautionary procedure
O

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

What was found

ECM DETECTED A 'SILENT' SURGE (NO CREW GRIPE) AT OR NEAR TOP OF DESCENT AT LOW POWER. THIS IS A RING CASE ENGINE. ACCOMPLISHED PRECAUTIONARY VISUAL CHECKS OF INLET AND EXHAUST AS WELL AS 2.5 BLEED AND 2.9 BLEED OPENINGS FOR DMG OR UNUSUAL MATERIAL. CONFIRM 2.5 BLD NOT DISCONNECTED REF MM71-08-00 FIG 110 CK 10 SHT 2. CK IP CK VALVE REF MM36-11-06 P6XX (IF NEC PCN 643-9217 REF MM36-11-06 PG4XX) AND RELATED DUCTING. CK PIMU FOR RELATED MSGS CK AND COPY OR PRINT EICAS EPCS, PERF PAGES AND EXCEEDANCE PAGE (IF ANY). ACCOMPLISHED EM3514-2 ENG CHECK AS ASSOSIATED MM REF ALL CHECKS OK NO FAULTS NOTED DATA SENT TO ENGINEERING.