Service difficulty report · Exciter · Boeing 737890

Difficulty date
June 8, 2010
Submitted
June 11, 2010
Operation
Air carrier
Aircraft
N588AS
Make and model
Boeing 737890
Aircraft serial
35685
Aircraft time
9,532 hours, 3,094 cycles
System (JASC)
7412 · Exciter
Part
Exciter
Part number
923M66P08
Part serial
UNJJF418
Condition
Failed
Location
Nr 1 Engine
Part time
9,536 hours, 3,095 cycles
Stage of operation
TX
How discovered
O
Nature of condition
R
Precautionary procedure
K

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

What was found

NR 1 ENGINE START FUEL LEVER TO IDLE NO FUEL FLOW OR EGT RISE. N2 REACHED 30 PERCENT ABORTED START AFTER 20 SEC. PERFORMED AUDIBLE TEST OF IGNITION SYS REF AMM 74 00 00 750 801 F00 VERY WEAK REPORT FROM NR 1 ENG LT IGNITION SYS IGNITER. REPLACED IGNITER REF AMM 74 21 02 400 801 F00 OPS CHECK BAD WEAK IGNITER STILL. FOUND CONNECTION BETWEEN EXCITER AND IGNITER LEAD WET AND CONTAMINATED. REPLACED IGNITER LEAD REF AMM 74 21 01 400 801 AND EXCITER UNIT REF AMM 74 11 01 400 801. OPS NORMAL RAN ENGINE IDLE OPS NORMAL. WHILE REMOVING IGNITER LEAD WATER RAN OUT OF COOLING DUCT. INSTALLED NEW COOLING DUCT REF 74 21 01 400 801. INSTALLED MATING BLOCK REF AMM 74 21 01 400 801.