Service difficulty report · Bushing · Boeing 737890

Difficulty date
June 7, 2021
Submitted
June 10, 2021
Operation
Air carrier
Aircraft
N533AS
Make and model
Boeing 737890
Aircraft serial
35201
Aircraft time
38,750 hours, 11,200 cycles
Engine
Cfmint CFM567B27
Part
Bushing
Part number
9942M75P029942M4
Condition
Missing
Location
Nr 1 Vsv
Stage of operation
IN
How discovered
B
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

DURING TROUBLESHOOTING FOR VSV POSITION SIGNALS DISAGREE A & B CHANNELS FAULTS FOUND VSV STAGES 1 AND 2 WITH 5 OR MORE MISSING BUSHINGS REF TASK 72-32-00-200-801-F00. GROUNDED - YES. INSPECTED VSV STG 1 AND 2 W/ BORESCOPE, FOUND STG 1 MISSING 5 BUSHINGS, 2 BROKEN BUSHINGS. FOUND STG 2 MISSING 21 BUSHINGS, 15 BROKEN BUSHINGS, 1 BUSHING SLEEVE MISSING. REPLACED STAGE 1 5 MISSING BUSHINGS & STAGE 2, 21 MISSING BUSHINGS REF B737-800 AMM 72-32-00-900-801-F00. ALL BROKEN BUSHING LEGS ARE PERMITTED REF AMM 72-32-00-200-801-F00.