SDR ASAA2017110522483

Service difficulty report · Probe · Boeing 737990ER

Difficulty date: November 5, 2017
Submitted: December 12, 2017
Operation: Air carrier
Aircraft: N428AS
Make and model: Boeing 737990ER
Aircraft serial: 36353
Aircraft time: 6,727 hours, 2,241 cycles
Engine: Cfmint CFM567B27E
System (JASC): 7720 · Engine Temperature Indicating System
Part: Probe
Part number: 0000
Condition: Dirty
Location: S2
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

WHILE ACCOMPLISHING T/C 78273000, FOUND FAULT MESSAGE IN HISTORY FOR NR 1 ENGINE, MESSAGE 77-10851. THE BOTTOM RIGHT EGT SIGNAL T49552 IS OUT OF RANGE. ACFT GROUNDED. TROUBLESHOT, REPAIRED AND TESTED. TESTED FIM 77-21, 802. CLEANED THE S2 PROBE IAW AMM 77-21-00-140-801, TESTED GOOD IAW AMM 73-21-00, MONITOR T49.5 TEMPS ON ENGINE IDLE RUN GOOD IAW FIM 77-21, 802.