Service difficulty report · Actuator · Boeing 737890

Difficulty date
November 17, 2019
Submitted
December 31, 2019
Operation
Air carrier
Aircraft
N536AS
Make and model
Boeing 737890
Aircraft serial
35203
Aircraft time
30,415 hours, 8,724 cycles
Engine
Cfmint CFM567B27
Part
Actuator
Part number
1211313010
Part serial
VN898
Condition
Out Of Limits
Location
Nr 2 Vsv
Part time
12,456 hours, 3,495 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

WHILE ACCOMPLISHING EEC BITE TEST, DISPLAYED #2 ENG MSG NBR: 75-10392 "THE VSV POSITION SIGNAL IS OUT OF RANGE" LONG TIME FAULT, DEFERRED PER T/C 78273000. GROUNDED - YES. DEFERRED PER T/C 78273000, DEFERRED FOR 450 FLT HOURS. TROUBLE SHOOTING ON 12/23/2019 PER W/O: 1014807 TASKCARD: N/R-00001 FAULT 75-10392 SHOWS ON ALL FLIGHT LEGS AND WHEN EEC TEST DONE FOR #2 ENGINE. VSV CHANNEL A (RH ACTUATOR) PINS 2 AND 3 HAVE NO CONTINUITY, DP902 TO DP909 HAS CONTINUITY. ACCOMPLISHED EEC AND ACTUATORS TESTS, MESSAGE 75-10392 REMAINS ACTIVE. REF B737-800 FIM 75-31 TASK 803. REMOVED AND REPLACED #2 ENG RH VSV ACTUATOR REF B737-800 AMM TASK 75-31-01/401. COMPLETED VSV ACTUATOR LEAK TEST REF AMM 75-31-01-790-801 NO LEAKS NOTED. THIS CLEARS PLT DEFERRAL. ALL TEST PASS.