SDR ASAA2017062021140

Service difficulty report · Probe · Boeing 737890

Difficulty date: June 20, 2017
Submitted: June 21, 2017
Operation: Air carrier
Aircraft: N579AS
Make and model: Boeing 737890
Aircraft serial: 35187
Aircraft time: 39,221 hours, 11,687 cycles
Engine: Cfmint CFM567B27
System (JASC): 7720 · Engine Temperature Indicating System
Part: Probe
Part number: TC29602
Condition: Out Of Tolerance
Location: Nr 1 Engine
Stage of operation: IN
How discovered: 9
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

ACCOMPLISHED T/C 78273000, FOUND ECONOMIC FAULT CODE 77-20871 THE TOP LEFT EGT OUT OF RANGE NR 1 ENGINE. ACFT GROUNDED. FOUND T49.5 S4 PROBE RESISTANCE VALUE OUT OF RANGE. REMOVED & REPLACED T49.5 S4 PROBE. OPS CHECK GOOD, REF B737-800 FIM 77-21 TASK 804, AMM 77-21-01, AND IPC 77-21-01-01.