SDR AALA202001299002

Service difficulty report · Blade · Boeing 737823

Difficulty date: January 28, 2020
Submitted: January 29, 2020
Operation: Air carrier
Aircraft: N904NN
Make and model: Boeing 737823
Aircraft serial: 33317
Aircraft time: 23,109 hours, 9,590 cycles
Engine: Cfmint CFM567B242
System (JASC): 7230 · Turbine Engine Compressor Section
Part: Blade
Condition: Damaged
Location: Nr 1 Hpc
Stage of operation: DE
How discovered: O
Nature of condition: E, R, A
Precautionary procedure: E

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

What was found

AIRCRAFT WAS GROUNDED: 360FL, .78 MACH, AC STARTED SHAKING NOTICEABLE, AT OFF, SPARKS FROM ENGINE NR 1. N1 45 PERCENT EGT SLIGHTLY HIGH. PAX SAW FLAMES FROM ENG. ENG SHUT DOWN WITHIN 2 MIN. SINGLE ENG RUN TIME 40 MIN. PERFORMED FIM 71-05-00-810-805-F00 AND A BOROSCOPE OF THE HPC AND FOUND DAMAGE ON STAGE 1 OF THE HPC BLADES AND EXTENDED AFTWARD. REPLACED NO.1 ENGINE IAW MCM 71-94-01, 71-94-42 AND 71-95-01.