SDR ASAA12511365

Service difficulty report · Probe · Boeing 737890

Difficulty date: April 9, 2012
Submitted: April 9, 2012
Operation: Air carrier
Aircraft: N513AS
Make and model: Boeing 737890
Aircraft serial: 35192
Aircraft time: 13,505 hours, 4,335 cycles
System (JASC): 7720 · Engine Temperature Indicating System
Part: Probe
Part number: TC29603
Condition: Faulty
Location: Nr 2 Engine
Stage of operation: IN
How discovered: V
Nature of condition: O
Precautionary procedure: K

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

What was found

DIAGNOSTICS REPORTED NR 2 ENGINE TREND DATA CONTINUES TO SHOW A SHIFT IN DELTA CRUISE AND TAKE OFF MARGIN INDICATIVE OF EGT INDICATION ERRORS. PREVIOUS MAINT EGT CONNECTOR CLEAN. NO FAULTS ON CURRENT FAULTS & FLIGHT FAULT HISTORY. ACCOMPLISHED AMM TASK 77-21-01-200-801-F00. VERIFIED DP1013 AT S4 STILL CLEAN. SUSPECT T49.5S4 (T524) LEFT UPPER EGT PROBE FAULTY. REPLACED T49.5S 4 AS PRECAUTIONARY REF AMM TASK 77-21-01, OPS CHECKED NORMAL.