SDR ASAA2017110222403

Service difficulty report · Eec · Boeing 737990ER

Difficulty date: November 2, 2017
Submitted: November 3, 2017
Operation: Air carrier
Aircraft: N428AS
Make and model: Boeing 737990ER
Aircraft serial: 36353
Aircraft time: 6,708 hours, 2,229 cycles
Engine: Cfmint CFM567B27E
System (JASC): 7320 · Fuel Controlling System
Part: Eec
Part number: 2042M67P02
Part serial: FFFH0591
Condition: Faulted
Location: Nr 2 Engine
Part time: 4,548 hours, 1,530 cycles
Stage of operation: TX
How discovered: O
Nature of condition: J
Precautionary procedure: D

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

What was found

NR 2 ENGINE CONTROL ON AFTER START. ACFT GROUNDED. FFR LOGGED 75-10582 - TBV, DEMAND & POSITION SIGNALS DISAGREE. COULD NOT DUPLICATE MALFUNCTION. ACCOMPLISHED FIM 75-23, TASK 801. ACTUATORS TESTED NORMAL. RANG HMU, TBV, TORQUE MOTOR FROM EEC DP0505. RESISTANCE NOMINAL AT 15.9 OHMS. REMOVED & REPLACED THE NR 2 ENGINE EEC. OPS CHECKED NORMAL IAW AMM 73-21-60-00-801-F00, 73-21-60-400-801-F00, 71-00-00-800-811-F00, 73-21-00-700-804-F00, 73-21-00-700-802-F00, AND 71-00-00-700-807-F00.