What was found
INVESTIGATION FOR DEFECTIVE STANDBY FUEL PUMP FOUND OVERSIZE VANES IN PUMP STICKING. PUMP OK WHEN NEW, BUT VANES SWELL UP WHEN IN JET FUEL. SUGGEST TO ORDER NEW PUMPS FROM BATCH S/N 8AMXXX, AND 9AMXXX.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
INVESTIGATION FOR DEFECTIVE STANDBY FUEL PUMP FOUND OVERSIZE VANES IN PUMP STICKING. PUMP OK WHEN NEW, BUT VANES SWELL UP WHEN IN JET FUEL. SUGGEST TO ORDER NEW PUMPS FROM BATCH S/N 8AMXXX, AND 9AMXXX.