Service difficulty report · Actuator · Boeing 737990ER

Difficulty date
July 26, 2022
Submitted
August 1, 2022
Operation
Air carrier
Aircraft
N428AS
Make and model
Boeing 737990ER
Aircraft serial
36353
Aircraft time
23,413 hours, 7,333 cycles
Engine
Cfmint CFM567B27E
Part
Actuator
Part number
3404026040
Part serial
EM4838437
Condition
Faulty
Location
#2 Engine
Part time
37,097 hours, 11,342 cycles
Stage of operation
IN
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

#2 ENG BITE HAD FAULT 75-30452 THE VBV POSITION SIGNALS DISAGREE. SHORT TIME FAULT. DEFERRED PER T/C 78273000. GROUNDED - YES. ACCCOMPLISHED B737-900 FIM 75-32 TASK 803. RESISTANCE AT PIN 1-2 ON VBV-B (LEFT HAND ACTUATOR) READS 343 OHMS -- OVER 20 OHMS HIGH. ALL OTHER READINGS WITHIN LIMITS FOR BOTH ACTUATORS. VBV-B REQUIRES REPLACEMENT. REMOVED AND REPLACED VBV-B REF B737-900 AMM 75-32-02/401.