SDR AALA202110113172

Service difficulty report · Probe · Boeing 737823

Difficulty date: October 7, 2021
Submitted: October 11, 2021
Operation: Air carrier
Aircraft: N834NN
Make and model: Boeing 737823
Aircraft serial: 29576
Aircraft time: 34,777 hours, 14,159 cycles
Engine: Cfmint CFM567B242
System (JASC): 7720 · Engine Temperature Indicating System
Part: Probe
Condition: Faulty
Location: Zone 400 - Nac/P
Component: Engine · CFM567B
Component part number: CFM567BTIQEC737
Stage of operation: CL
How discovered: V
Nature of condition: N
Precautionary procedure: O, A

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

AIRCRAFT WAS GROUNDED: EGT INCREASED RAPIDLY INTO AMBER RANGE ON RH ENGINE DURING CLIMB, CREW THROTTLED BACK TO AVOID REDLINE; FLIGHT DECLARED EMERGENCY AND DIVERTED TO LAS. REPLACED S1, S2, S3, AND S4 EGT PROBES (AALA202110118169, AALA202110112201, AALA202110119569) WITH SERVICEABLE UNITS IAW AMM 77-21-01, OPS CHECK GOOD.