Service difficulty report · Bypass Switch · Boeing 737890

Difficulty date
April 4, 2012
Submitted
May 25, 2012
Operation
Air carrier
Aircraft
N518AS
Make and model
Boeing 737890
Aircraft serial
35693
Aircraft time
11,865 hours, 3,588 cycles
Engine
Cfmint CFM567B273
Part
Bypass Switch
Part number
QA07995
Part serial
YY098310Y
Condition
Failed
Location
Nr 2 Engine
Part time
11,854 hours, 3,575 cycles
Stage of operation
CL
How discovered
O
Nature of condition
J
Precautionary procedure
A

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

What was found

NR 2 ENGINE FILTER BYPASS LIGHT ILLUMINATED DURING CLIMBOUT AND REMAINED ON. PERFORMED FIM TASK 73-05-00-810-801-F00 TO SLUPS 4 CONF FILTER BYPASS SWITCH DEFECTIVE. REPLACED FUEL FLTR NR 2 ENG PER AMM 73-11-02-400-801. NO DEBRIS. REPLACED SWITCH PER AMM 73-34-01-000-801-F00 PERFORMED IDLE PWR LEAK CHECK PER AMM 71-00-00-700-801-F00, NO LEAKS NOTED. PERFORMED EEC BITE CHECK GRND TEST 73-21-00-700-804-F00, GOOD.