SDR ASAA2017123023071

Service difficulty report · Connector · Boeing 737890

Difficulty date: December 30, 2017
Submitted: February 16, 2018
Operation: Air carrier
Aircraft: N581AS
Make and model: Boeing 737890
Aircraft serial: 35188
Aircraft time: 40,617 hours, 12,183 cycles
System (JASC): 7797 · Engine Indicating System Wiring
Part: Connector
Condition: Dirty
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

ECONOMIC MSG NR 77-20861 BOTTOM LEFT EGT SIGNAL (T495S3) IS OUT OF RANGE NR 1 ENGINE (FROM T/C 78273000). GROUNDED - YES. PERFORMED NR 1 ENGINE INITIAL EVALUATION FOR FIM 77-21 TASK 803 AND EGT CONNECTOR CLEANING REF AMM 77-21-00. PRE CLEANING VALUES: T495 S1-145.00 S2-88.37 S3-93.00 AND S4167.12. POST CLEANING: T495 S1-5.87 S2-24.00 S3-28.50 AND S4-58.37 EEC TEST SHOWS NO FAULTS. ETOPS SYSTEM GROUND VERIFICATION SUCCESSFUL. AIRCRAFT RELEASED FROM PLT.