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SDR ASAA2018050624560

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Service difficulty report · Unknown · Boeing 737890

FAA SDR system

Difficulty date
May 6, 2018
Submitted
June 20, 2018
Operation
Air carrier
Aircraft
N585AS
Make and model
Boeing 737890
Aircraft serial
35683
Aircraft time
40,865 hours, 12,258 cycles
System (JASC)
7722 · Engine EGT/TIT Indicating System
Part
Unknown
Condition
Malfunctioned
Location
Egt System
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

FOUND RECENT FAULT ON ENGINE NR 2. FAULT 77-10852, THE BOTTOM RIGHT EGT SIGNAL (T49552) IS OUT OF RANGE. ECONOMIC FAULT. DEFERRED PER T/C 78273000. GROUNDED - YES. REFB737-800 FIM 77-21 TASK 802 FOR TROUBLESHOOTING. NO RECENTS FAULTS STORED. EEC TEST PASSED. PERFORMED EGT SYSTEM INSPECTION AND RESISTANCE CHECKS REF AMM 77-21-01-200-801-F00. NO DEFECTS. PERFORMED EGT CLEANING REF AMM 77-21-00-140-801. BEFORE CLEANING: S1=31.6, S2= 19.6, S3= 20, S4=33. AFTER CLEANING: S1=24, S2=15, S=17, S4=24.