Narrative:

We departed lga on scheduled flight air carrier xx to yyz at xa. The #2 (center) cockpit fuel quantity gauge was placarded inoperative. We had obtained the necessary fuel slip from the fueler and checked the data as per operating procedures prior to gate departure. All appeared satisfactory. While taxiing out the #2 gen breaker tripped followed by a CSD low oil pressure light. We disconnected the CSD as per procedures and returned to the ramp for maintenance. The #2 gen was subsequently placarded inoperative and once again we started engines for departure. Total ground time with 2 or 3 engines running was 37 mins. 60 mi southeast of buf VOR at FL330 the F/east brought our attention to the #2 tank left aft fuel boost pump low pressure light on. The #2 fuel tank gauge read 0, but was placarded inoperative, so could not be relied upon. The #1 tank read 5000 pounds and the #3 tank read 500 pounds, for a total of 1000 pounds showing on our reliable gauges. We discussed the situation and decided that as we could not explain why the low pressure light was on and furthermore could not really determine how much fuel remained in the #2 tank we requested a level off at FL240, a turn toward yyz and expedited handling. ZOB handed us off to yyz approach and we landed straight in on runway 33. During an essentially power off descent and approach 2 more boost pump low pressure lights in the #2 tank illuminated. We landed west/O incident and taxied to the gate. The APU would not start. The fuelers at yyz dip-sticked the #2 tank and stated it was dry. We were refueled, ran all 3 engines and APU and no leak was found. We flew the aircraft back to lga west/O passenger.

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Original NASA ASRS Text

Title: ACR LGT EXPERIENCED LOW FUEL BOOST PRESSURE IN FUEL TANK WITH INOPERATIVE FUEL INDICATING SYSTEM APPARENTLY CAUSED BY LACK OF FUEL.

Narrative: WE DEPARTED LGA ON SCHEDULED FLT ACR XX TO YYZ AT XA. THE #2 (CENTER) COCKPIT FUEL QUANTITY GAUGE WAS PLACARDED INOP. WE HAD OBTAINED THE NECESSARY FUEL SLIP FROM THE FUELER AND CHKED THE DATA AS PER OPERATING PROCS PRIOR TO GATE DEP. ALL APPEARED SATISFACTORY. WHILE TAXIING OUT THE #2 GEN BREAKER TRIPPED FOLLOWED BY A CSD LOW OIL PRESSURE LIGHT. WE DISCONNECTED THE CSD AS PER PROCS AND RETURNED TO THE RAMP FOR MAINT. THE #2 GEN WAS SUBSEQUENTLY PLACARDED INOP AND ONCE AGAIN WE STARTED ENGS FOR DEP. TOTAL GND TIME WITH 2 OR 3 ENGS RUNNING WAS 37 MINS. 60 MI SE OF BUF VOR AT FL330 THE F/E BROUGHT OUR ATTN TO THE #2 TANK LEFT AFT FUEL BOOST PUMP LOW PRESSURE LIGHT ON. THE #2 FUEL TANK GAUGE READ 0, BUT WAS PLACARDED INOP, SO COULD NOT BE RELIED UPON. THE #1 TANK READ 5000 LBS AND THE #3 TANK READ 500 LBS, FOR A TOTAL OF 1000 LBS SHOWING ON OUR RELIABLE GAUGES. WE DISCUSSED THE SITUATION AND DECIDED THAT AS WE COULD NOT EXPLAIN WHY THE LOW PRESSURE LIGHT WAS ON AND FURTHERMORE COULD NOT REALLY DETERMINE HOW MUCH FUEL REMAINED IN THE #2 TANK WE REQUESTED A LEVEL OFF AT FL240, A TURN TOWARD YYZ AND EXPEDITED HANDLING. ZOB HANDED US OFF TO YYZ APCH AND WE LANDED STRAIGHT IN ON RWY 33. DURING AN ESSENTIALLY PWR OFF DSNT AND APCH 2 MORE BOOST PUMP LOW PRESSURE LIGHTS IN THE #2 TANK ILLUMINATED. WE LANDED W/O INCIDENT AND TAXIED TO THE GATE. THE APU WOULD NOT START. THE FUELERS AT YYZ DIP-STICKED THE #2 TANK AND STATED IT WAS DRY. WE WERE REFUELED, RAN ALL 3 ENGS AND APU AND NO LEAK WAS FOUND. WE FLEW THE ACFT BACK TO LGA W/O PAX.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.