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SDR ASAA2017021419819

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Service difficulty report · Probe · Boeing 737890

FAA SDR system

Difficulty date
February 14, 2017
Submitted
February 16, 2017
Operation
Air carrier
Aircraft
N587AS
Make and model
Boeing 737890
Aircraft serial
35684
Aircraft time
35,718 hours, 10,421 cycles
System (JASC)
7722 · Engine EGT/TIT Indicating System
Part
Probe
Part number
TC29603
Condition
Faulty
Location
Nr 1 Engine
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

ENGINE 1 SHOW ECONOMIC FAULT. EGT SIGNAL IS OUT OF RANGE. BOTTOM LEFT. GROUNDED - YES. NR 1 ENGINE FAULT 77-20861 WAS LOGGED ON ALL TEN STARTS IN EEC MEMORY AND INPUT MONITORING SHOWED BOTTOM LEFT PROBE (T495S3) TO BE ALL DASHES. REMOVED AND REPLACED BOTTOM LEFT EGT PROBE (T495S3) PER AMM 77-21-01-000-801-F00 / 77-21-01-400-801-F00. INPUT MONITORING NOW SHOWS NORMAL READINGS FOR ALL NR 1 ENGINE EGT PROBE INPUTS. PERFORMED EEC TEST PER AMM 73-21-00-700-804-F00 - ALL TESTS PASS. CLEARS PLT DEFERRAL.