Service difficulty report · Probe · Boeing 737890

Difficulty date
November 30, 2015
Submitted
December 4, 2015
Operation
Air carrier
Aircraft
N594AS
Make and model
Boeing 737890
Aircraft serial
35191
Aircraft time
29,604 hours, 9,013 cycles
Engine
Cfmint CFM567B27B3
Part
Probe
Part number
TC29604
Condition
Faulted
Location
Nr 2 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

NR 2 ENGINE ELECTRONIC ENGINE CONTROL BITE SHOWS ECONOMIC-LEVEL FAULT 73-31372, UPPER EGT SECTORS READING HIGH, LOGGED FOR 4 OUT OF 10 LEGS. ACFT GROUNDED. INSPECTED AND FOUND NR 2 ENGINE S1 AND S4 READING HIGH TEMP VALUE ABOVE 100 DEGREES. ACCOMPLISHED FIM 73-11, TASK 801. IN ADDITION ACCOMPLISHED EGT INSPECTION REF AMM 77-21-01. FOUND PROBE S1 AND S4 HAD HIGH RESISTANCE OUT OF LIMITS 8.0 OHMS EACH PROBE. R & R S1 AND S4 PROBES REF 77-21-01. PERFORMED ELECTRONIC ENGINE CONTROL TEST FOR NR 2 ENGINE, REF AMM 71-00-00. SYS CHECKS NORMAL. READINGS ARE NORMAL.