SDR 99UAL900554

Service difficulty report · Socket · Boeing 727222

Difficulty date: October 25, 1999
Submitted: October 9, 2000
Operation: Air carrier
Aircraft: N7284U
Make and model: Boeing 727222
Aircraft serial: 21562
Aircraft time: 60,925 hours, 34,774 cycles
Engine: Pwa JT8D15
Engine time: 57,272 hours, 32,767 cycles
System (JASC): 7722 · Engine EGT/TIT Indicating System
Part: Socket
Condition: Loose
Location: Nr 1 Egt Ind
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

NR 1 ENGINE REACHED 640 DEGREES EGT ON CLIMBOUT (30 SECONDS OVERTEMP) APPROXIMATELY 1.8 EPR - N1 99 PERCENT HAD TO PULL THROTTLE BACK 4 INCHES TO MAINTAIN TEMPERATURE IN NORMAL RANGE. RETURNED TO DEN. *S/D* THE EGT EXCEEDANCE WAS AN INDICATION PROBLEM. TROUBLESHOOTING REVEALED FAULTY RETENTION AT SOCKET D374J POS L WHICH IS PART OF THE NR 1 EGT INDICATION SYSTEM. THE SOCKET WAS REPLACED, THE SYSTEM CALIBRATED AND THE EGT INDICATOR ALSO REPLACED AS A PRECAUTION. GROUND ENGINE RUNS CONFIRMED THE FIX.