Service difficulty report · Eec · Boeing 737990ER

Difficulty date
September 9, 2023
Submitted
September 13, 2023
Operation
Air carrier
Aircraft
N428AS
Make and model
Boeing 737990ER
Aircraft serial
36353
Aircraft time
27,399 hours, 8,581 cycles
Part
Eec
Part number
2042M67P02
Part serial
LMDR4644
Condition
Faulty
Location
#1 Engine
Part time
52,487 hours, 18,081 cycles
Stage of operation
IN
How discovered
O
Nature of condition
J
Precautionary procedure
K

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

WHILE PERFORMING T/C 78273000 FOUND #1 ENG SHORT TIME FAULTS 75-10451 AND 75-20451 THE VBV POSITION DISAGREE. GROUNDED - YES. (RESOLVED ON W/O: 1968547 TASKCARD: N/R-00002 ) INITIAL EVALUATION PERFORMED EEC BITE PROCEDURE REF FIM 73-00 TASK 801. BITE TEST REVEALED THE FOLLOWING 15 FAULTS UNDER RECENT FAULTS: SHORT TIME FAULTS 73-10011, 73-10321, 75-10371, 75-10421, 75-10571, 73-10621, 73-11271, 73-21281, 73-10341, 75-20451, LONG TIME FAULTS 73-10041, 75-10391, 77-11181, AND ECONOMIC FAULTS 75-10291, 75-10521. PER FIM 73-21 TASK 807, # 1 EEC HAS AN INTERNAL FAULT. REMOVED AND REPLACED # 1 EEC REF AMM 73-21-60/401. OPS CHECK OK, GROUND VERIFICATION SUCCESSFUL. THIS CLEARS PLT, SEAMC TODD NOTIFIED.