As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FUEL TRANSFER AT CRUISE FL340 MOMENTARY LOSS OF THRUST WHEN RT FUEL BOOST PUMP SELECTED OFF. MONETARY INCREASE IN THRUST AND APPROXIMATELY 150 PPH FUEL FLOW WHEN RT PUMP SELECTED ON. INSTALLED OH FUEL TRANSFER VALVE WITH NEW O RINGS P/N HTE 7300N16-128 PER. 800XP MM. 28-20-61. OPS. CHECK GOOD.