SDR ASAA2014052907991

Service difficulty report · Probe · Boeing 737890

Difficulty date: May 29, 2014
Submitted: June 2, 2014
Operation: Air carrier
Aircraft: N577AS
Make and model: Boeing 737890
Aircraft serial: 35186
Aircraft time: 27,429 hours, 8,228 cycles
System (JASC): 7720 · Engine Temperature Indicating System
Part: Probe
Condition: Dirty
Location: Nr 2 Engine
Stage of operation: IN
How discovered: 9
Nature of condition: N
Precautionary procedure: K

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

What was found

FOUND FAULT 77-20872 TOP LEFT EGT SIGNAL OUT OF RANGE NR 2 ENGINE "ECONOMIC" FAULT. ACFT GROUNDED. PERFORMED EGT CLEANING ON NO. 2 ENGINE REF MM 77-21-00-201. INPUT MONITORING SHOWED THESE T49.5 SYS TEMPERATURES BEFORE CLEANING: S1, 94.12, S2, 48.49, S3, 54.01, AND S4. AFTER CLEANING TEMPS WERE: S1, 51.22, S2, 32.41, S3, 31.44, AND S4, 53.44. AFTER CLEANING VALUES WITHIN TOLERANCE.