SDR CA130923014

Service difficulty report · Bypass Valve · Boeing 737*

Difficulty date: September 21, 2013
Submitted: September 14, 2015
Operation: General aviation
Make and model: Boeing 737*
Aircraft time: 24,036 hours
Engine: Cfmint CFM567B22
System (JASC): 7331 · Fuel Flow Indicating
Part: Bypass Valve
Part number: QA07995
Condition: Malfunctioned
Location: Fuel System
Part time: 6,827 hours
Stage of operation: CR
How discovered: O
Nature of condition: N
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 FUEL FILTER BYPASS LIGHT ILLUMINATED 20 MINS AFTER TAKEOFF AT FL390. ACFT RETURNED FOR LANDING WHERE THE LIGHT EXTINGUISHED AT THE GATE WHEN ENGINE WAS SHUTDOWN. FIM 73-05 TASK 801, CARRIED OUT WHERE THE FUEL FLOW DIFFERENTIAL PRESSURE SWITCH WAS FOUND FAILED. ACFT CONTINUED OPERATIONS IAW MEL 73-4-1 "RT FUEL FILTER DIFFERENTIAL PRESSURE WARNING SYSTEM INOPERATIVE". UPON TERMINATION OF THE DAY`S FLYING THE FFDPS WAS REPLACED IAW AMM 73-34-01.