SDR ASAA2017011719490

Service difficulty report · Balance Weight · Boeing 737890

Difficulty date: January 17, 2017
Submitted: January 23, 2017
Operation: Air carrier
Aircraft: N512AS
Make and model: Boeing 737890
Aircraft serial: 39043
Aircraft time: 32,553 hours, 9,886 cycles
Engine: Cfmint CFM567B273B3
System (JASC): 7220 · Turbine Engine Air Inlet Section
Part: Balance Weight
Part number: 3013156250
Condition: Out Of Adjust
Location: Nr 1 Engine
Stage of operation: NR
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

NR 1 ENGINE TREND DATA SHOWS LOW PRESSURE ROTOR VIBRATION LEVELS TO BE TRENDING HIGHER THAN EXPECTED AFTER LAST FAN MAINTENANCE. GROUNDED - YES. ACCOMPLISHED AMM TASK 71-00-00-750-808-F00 TEST 14B. BALANCE WEIGHTS 24 P12 CHANGED TO P14, 28 P12 CHANGED TO P14, 31 P14 CHANGED TO P08, 32 P12 CHANGED TO P11, 33 P14 CHANGED TO P11, & 34 P14 CHANGED TO P08.