SDR ASAA2016022115615

Service difficulty report · Probe · Boeing 737890

Difficulty date: February 21, 2016
Submitted: February 23, 2016
Operation: Air carrier
Aircraft: N581AS
Make and model: Boeing 737890
Aircraft serial: 35188
Aircraft time: 33,933 hours, 10,278 cycles
Engine: Cfmint CFM567B27
System (JASC): 7720 · Engine Temperature Indicating System
Part: Probe
Part number: TC29603
Condition: Failed
Location: Nr 1 Engine
Stage of operation: IN
How discovered: V
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 TC 78273000, NR 1 ENGINE RECENT FAULTS, FAULT HISTORY DISPLAY FAULT 73-31371, UPPER EGT SECTORS READING HIGH. FLT LEGS 2,4 AND 10, FAULT IS ECONOMIC. ACFT GROUNDED. ACCOMPLISHED FIM 73-11, TASK 801, STEP E5 C1. S4, 125 DEGREES LOWER THAN OTHER 3. ACCOMPLISHED FIM 77-05, TASK 801, PROBE S4 MORE THAN 50 DEGREES DIFFERENT THAN OTHER 3. R & R S4 REF AMM 77-21-01. OPS GOOD.