What was found
#1 ENG REAR TURBINE FLANGE ASSY IS CRACKED @ 12, 1 & 3 O'CLOCK INTERMEDIATE FLANGE HOLES. GROUNDED - YES. REMOVED AND REPLACED #1 ENG. REAR TURBINE FLANGE ASSY. SECURED. REF B737-800 AMM 78-11-02 AND 72-56-00.
- Difficulty date
- December 13, 2017
- Submitted
- December 15, 2017
- Operation
- Air carrier
- Aircraft
- N518AS
- Make and model
- Boeing 737890
- Aircraft serial
- 35693
- Aircraft time
- 34,019 hours, 10,144 cycles
- Engine
- Cfmint CFM567B27
- System (JASC)
- 7250 · Turbine Section
- Part
- Flange
- Part number
- 3401688030
- Condition
- Cracked
- Location
- Nr 1 Turbine
- 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.