SDR ASAA2018020523418

Service difficulty report · Flange · Boeing 737890

Difficulty date: February 5, 2018
Submitted: February 7, 2018
Operation: Air carrier
Aircraft: N534AS
Make and model: Boeing 737890
Aircraft serial: 35202
Aircraft time: 27,995 hours, 8,191 cycles
Engine: Cfmint CFM567B27
System (JASC): 7250 · Turbine Section
Part: Flange
Part number: 3401688030
Condition: Cracked
Location: Turbine Frame
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

NR 1 ENGINE TURBINE FRAME FLANGE ASSY HAS CRACKS. ACFT GROUNDED. REMOVED THE NR 1 ENGINE PRIMARY PLUG ASSY IAW AMM 78-11-02-000-801-F00. REMOVED AND REPLACED TURBINE REAR FRAME FLANGE ASSY IAW AMM 72-56-00-000-802-F00, STEPS 2F, 1 AND 4, 72-56-00-400-801-F00, STEPS 3F, 2 A THRU D AND I AND 3F, 3. REINSTALLED THE NR 1 ENGINE PRIMARY PLUG ASSY IAW AMM 78-11-02-400-801-F00.