Service difficulty report · Sensor · Boeing 767323

Difficulty date
February 23, 2024
Submitted
February 28, 2024
Operation
Air carrier
Aircraft
N491AZ
Make and model
Boeing 767323
Aircraft serial
29429
Aircraft time
89,151 hours, 15,879 cycles
Engine
Ge CF680C2B6
Engine time
76,490 hours, 13,507 cycles
Part
Sensor
Part number
77732847
Part serial
A95060016
Condition
Binding
Location
Rt Engine Temp
Part time
89,151 hours, 15,879 cycles
Stage of operation
DE
How discovered
O
Nature of condition
B
Precautionary procedure
A

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

What was found

AT TOP OF DESCENT WITH RT THROTTLE MOVING TO IDLE, RT ENGINE COMPRESSOR STALLED MULTIPLE TIMES WITH A RISE IN EGT. AN ODOR WAS DETECTED IN CABIN. STALL & ODOR INCREASED EACH TIME THROTTLE REDUCED TO IDLE. CREW NOTIFIED DESTINATION STATION KILN, DECLARED EMERGENCY ON DESCENT. LANDED WITHOUT INCIDENT & NO ADDITIONAL PRECAUTIONARY ACTIONS. ON ARRIVAL, ACFT GROUNDED. IAW MM 72-00-00 PARA L SUBTASKS 1, 5, 6 & 11 & PARA M, FAN BLADE SHINGLING INSP, HP TURBINE BORESCOPE INSP, MAGNETIC CHIP DETECTOR CHECK, & CIT PRESSURE CHECK GOOD. NO FAULTS NOTED. IAW POWERPLANT ENGINEERING DFDR R & INTERROGATED & QAR DOWNLOADED FOR RELATIVE DATA PERTAINING TO ENG PARAMETERS. DURING ADDITIONAL TROUBLESHOOTING, LINE MAINT REPORTED, REVERSE FLOW BLEED CHECK FAILED. 8TH STAGE CHECK VALVE JAMMED OPEN & FAN AIR TEMP SENSOR WILL NOT CLOSE FULLY. INTERM AIR SUPPLY CHECK VALVE & FAN AIR TEMP SENSOR R & R. SECURITY & INTEGRITY OF ASSOCIATED DUCT CLAMPS VERIFIED. OPS AND LEAK CHECKED GOOD DURING FULL RUN-UP END TEST #8 WITH BLEED SHIFT CHECK IAW AMM 71-00-00. ENG ENGINEERING REVIEW OF DFDR & QAR DOWNLOADS CONCLUDED NO ADDITIONAL CORRECTIVE ACTIONS WARRANTED. AIRCRAFT RELEASED TO SERVICE.