SDR ASAA2016011914926

Service difficulty report · Probe · Boeing 737990ER

Difficulty date: January 19, 2016
Submitted: January 22, 2016
Operation: Air carrier
Aircraft: N433AS
Make and model: Boeing 737990ER
Aircraft serial: 41704
Aircraft time: 8,887 hours, 2,845 cycles
System (JASC): 7720 · Engine Temperature Indicating System
Part: Probe
Part number: TC29604
Condition: Failed
Location: Nr 1 Engine
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

NR 1 ENGINE, PERFORMED T/C 78273000, FAULT 77-20871 AND 73-31371, THE TOP EGT SECTOR IS BAD, S4, READING 500 DEGREES OUT FROM THE S1. AFTER EGT CLEAN, NO HELP. ACFT GROUNDED. R & R T49.5 S4 PROBE IAW AMM 77-21-01-000-801-F00 AND 77-22-01-400-801-F00, OPS CHECK GOOD.