What was found
(CAN) THE FLIGHT CREW REPORTED THE NR 1 -FUEL LOW PRESS- CAUTION LIGHT WOULD ILLUMINATE AS SOON AS THE AUXILIARY FUEL PUMP WAS SELECTED OFF, BUT THE LIGHT WOULD GO OUT AT LOW POWER SETTINGS. MAINTENANCE INVESTIGATION REVEALED THAT A FITTING ON THE MOTIVE FLOW LINE INSIDE THE FUEL TANK COLLECTOR BAY WAS LEAKING AND LIMITING THE OUTPUT FROM THE EJECTOR PUMPS IN THE FUEL TANK. THE O-RINGS INSIDE THE FITTING WERE REPLACED AND THE AIRCRAFT WAS RETURNED TO SERVICE. TTAF 22,271 TCAF 32,957.