Service difficulty report · Spacer · Boeing 737990ER

Difficulty date
August 23, 2020
Submitted
August 24, 2020
Operation
Air carrier
Aircraft
N453AS
Make and model
Boeing 737990ER
Aircraft serial
36354
Aircraft time
25,582 hours, 8,137 cycles
Engine
Cfmint CFM567B27E
Part
Spacer
Part number
3400012620
Condition
Vibration
Location
#2 Eng Fan Blade
Stage of operation
NR
How discovered
O
Nature of condition
E
Precautionary procedure
O

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

What was found

NR 2 ENGINE TREND DATA SHOWS A RISE IN LOW PRESSURE ROTOR VIBRATION LEVELS WITH EXCESSIVE SCATTER. GROUNDED - YES. REMOVED AND REPLACED 1EA SPACER AND REPLACED ALL FAN BLADE SHIMS. WORK ACCOMPLISHED PER T/C 78472010. VERIFIED SPINNER CONE WEIGHTS MATCH WHAT IS RECORDED ON A/C AAVM. ACCOMPLISHED STEP 6, VIBS WITHIN LIMITS.