- Difficulty date
- October 3, 2022
- Submitted
- October 3, 2022
- Operation
- Air carrier
- Make and model
- Boeing 737990ER
- Aircraft serial
- 41733
- Aircraft time
- 34,939 hours, 11,148 cycles
- Engine
- Cfmint CFM567B27E
- Part
- Probe
- Part number
- TC29603
- Condition
- Faulty
- Location
- #1 Engine
- 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
GE DIAGNOSTICS REPORTS #1 ENGINE (SN 962559) TREND DATA SHOWS A DELTA EGT INCREASE. DELTA FUEL FLOW AND CORE SPEED REMAIN STABLE. INDICATION ERRORS ARE SUSPECTED. CNR 20220926002. GROUNDED - YES. REMOVED AND REPLACED T49.5 S3 PROBE SENSOR REF. B737-900 AMM 77-21-01-801-FOO.