Service difficulty report · Exciter · Boeing 737890

Difficulty date
April 24, 2010
Submitted
April 26, 2010
Operation
Air carrier
Aircraft
N566AS
Make and model
Boeing 737890
Aircraft serial
35181
Aircraft time
12,620 hours, 3,918 cycles
Engine
Cfmint CFM567B27
System (JASC)
7412 · Exciter
Part
Exciter
Part number
9238M66P08
Part serial
UNJNW773
Condition
Faulty
Location
Nr 1 Engine
Part time
4,673 hours, 1,347 cycles
Stage of operation
TX
How discovered
O
Nature of condition
O
Precautionary procedure
D

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

What was found

NR 1 ENG FAILED TO LIGHT OFF AFTER FUEL LEVER BROUGHT TO IDLE. ALL N1 N2 AND OIL PRESSURE INDICATIONS WERE NORMAL. INITIAL FUEL FLOW OF 1500LBS THEN DROPPED BACK TO 500LBS THEN 0 WITH NO LIGHT OFF. IGNITION SWITCH WAS ON RIGHT. ACCOMPLISHED FIM TASK 74 21 00 IGN R (IGN 2) IS FAILED FAULT ISOLATION TASK 74 00 00. FOUND RIGHT IGNITION EXCITER AND RIGHT IGNITER BAD. REMOVED & REPLACED RIGHT IGNITION EXCITER AND RIGHT IGNITER IAW AMM REF 74 11 01 IGNITION EXCITER 74 21 02 PAGE BLOCK 601, MAIN IGNITER PLUG OPS CHECK NORMAL.