SDR ASAA2017081721674

Service difficulty report · Probe · Boeing 737890

Difficulty date: August 17, 2017
Submitted: August 28, 2017
Operation: Air carrier
Aircraft: N506AS
Make and model: Boeing 737890
Aircraft serial: 35690
Aircraft time: 34,903 hours, 10,686 cycles
Engine: Cfmint CFM567B27
System (JASC): 7310 · Engine Fuel Distribution
Part: Probe
Condition: Dirty
Location: Egt
Stage of operation: IN
How discovered: O
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

PERFORMING T/C 78273000 FOUND #2 ENGINE MX MESSAGE 73-31372 ECONOMIC FAULT-UPPER EGT SECTORS READING TO HIGH. GROUNDED - YES. ACCOMPLISHED B737-800 FIM 73-11 TASK 801. VERIFIED T49.5 EGT PROBE, S4, IS 100 DEG ABOVE THE AVERAGE OF S2 & S3. CLEANED EGT PROBES REF B737-800 AMM 77-21-00-140-801. INITIAL READINGS: S1- 47.30, S2- 33.61, S3- 32.84, S4- 146.34. AFTER CLEANING: S1- 42.65, S2- 32.21, S3- 31.27, S4- 39.47. ACCOMPLISHED EEC TEST REF AMM 73-21-00-700-804-F00. NO FAULTS FOUND. THIS CLEARS PLT.