Service difficulty report · Servo Motor · Boeing 737890

Difficulty date
March 23, 2019
Submitted
March 25, 2019
Operation
Air carrier
Aircraft
N506AS
Make and model
Boeing 737890
Aircraft serial
35690
Aircraft time
40,589 hours, 12,435 cycles
Part
Servo Motor
Part number
305RAA1
Part serial
AS05444
Condition
Faulty
Location
Autothrottle Sys
Part time
39,751 hours, 12,160 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

FOLLOW-UP TO HISTORY OF THROTTLE SPLIT. GROUNDED - YES. ENGINEERING REQUEST - REMOVED AND REPLACED FCC A PER AMM 22-11-33. REMOVED AND REPLACED THE AUTOTHROTTLE SERVO MOTOR PER AMM 22-31-91, OPS CHECK GOOD PER SAME. ACCOMPLISHED FCC LLM MAINTENANCE TEST PER AMM 22-11-33-400-801 STEP J. (1) (A AND B) TEST SUCCESSFUL. ETOPS GROUND VERIFICATION SUCCESSFUL.