Falcon 20FJF/20C/20D/20E/20F
Flight Crew Commercial
Aircraft Equipment Problem Critical
Air Traffic Control Issued New Clearance; Flight Crew Landed As Precaution; Flight Crew Diverted
Manuals; Aircraft
Aircraft was level at FL350. It was my leg and the autopilot was engaged. I had noticed a couple hundred pound split in the feeder tanks but did not see it as a concern. I then saw the Number 2 transfer light illuminate. I brought the illumination to the attention of [the] Captain. He asked me to run the checklist for transfer light illumination. All steps were completed. A few minutes later the Number 1 transfer light illuminated followed by a further drop in the feeder tank level on the number one side. I once again ran the transfer light illumination procedure; completing all steps. This did not correct the problem. It was at this time that [the] Captain took control of the aircraft [and] advised ATC of the malfunction. I took pilot monitoring duties and began preparing for landing.A procedure needs to be in place on how to deal with a dual transfer light failure.
Falcon 20 First Officer reported encountering a dual fuel transfer light issue in flight that he stated was not well covered in the manual.