What was found
(CAN) PILOT REPORTED LOW FUEL LIGHT ILLUMINATED JUST AFTER LANDING, HE PULLED THE CBS ON THE LT & RT BOOST PUMPS & WITHIN 30 SECONDS THE ENG FLAMED OUT. DURING THE ANNUAL INSPECTION OF THE FUEL SYS IT WAS FOUND THAT THE FWD LT FUEL CELL HAD A REMAINING 5 GALLONS OF FUEL. FURTHER INVESTIGATION REVEALED THAT CHECK VLV PN ZT2CV06A08B INSTALLED BEFORE THE EJECTOR PUMP WAS INSTALLED BACKWARDS, THUS NOT ALLOWING FUEL TO FLOW TO THE LT EJECTOR PUMP & LEAVING THE FUEL IN THE FWD LT TANK UNUSABLE. THE PROBLEM WITH THE CHECK VLV IS THAT IT HAS TWO MALE FITTINGS & CAN BE INSTALLED IN THE SYS VERY EASILY BACKWARDS, IT HAS A SMALL LASER ETCHED ARROW ON THE BODY OF THE VLV WHICH ISN’T VERY LEGIBLE. EVEN IF THE CHECK VLV IS INSTALLED ON THE FILTER CORRECTLY THE CHECK VLV & THE FILTER ASSEMBLY CAN BE INSTALLED IN THE THE SYS BACKWARDS. REFERENCE BHT 206LS-28-1001 FIG 28-1 FUEL SYS INSTALLATION.