Narrative:

I had flown 5 legs after which I was asked by crew scheduling if I would mind flying one more leg into an overnight. They told me the flight was already late and that the passenger were already on board, but they were short one pilot. I said if it worked, I wouldn't mind taking the flight. The scheduler then asked me how much rest I had the night before and how long I had been on duty. I told him both and he said he didn't see any problem with me flying the trip. Since the scheduler was using the company's fos computer system, which is supposed to generate an alert if a trip is illegal. I had no reason to doubt him, so I accepted the trip. About halfway to the destination I started thinking about the amount of hours I had flown. Adding up my times for the previous 5 legs I came up with 7.0 hours. Since the leg I was flying was scheduled for 1.5 hours and the maximum is 8 hours, it was obvious that the trip was illegal. I called the scheduler when I got on the ground and asked him to add my times, and he confirmed that the trip was illegal. I asked why the fos didn't generate an alert, and was told the alert came up on the wrong day and that the program still had some bugs in it. My solution, from now on, is to check the legality of a trip myself and not rely on a computer program.

Related reports:

Google
 

Original NASA ASRS Text

Title: CAPT OF AN LTT ACR ACFT EXCEEDED FLT TIME DUTY LIMITATIONS.

Narrative: I HAD FLOWN 5 LEGS AFTER WHICH I WAS ASKED BY CREW SCHEDULING IF I WOULD MIND FLYING ONE MORE LEG INTO AN OVERNIGHT. THEY TOLD ME THE FLT WAS ALREADY LATE AND THAT THE PAX WERE ALREADY ON BOARD, BUT THEY WERE SHORT ONE PLT. I SAID IF IT WORKED, I WOULDN'T MIND TAKING THE FLT. THE SCHEDULER THEN ASKED ME HOW MUCH REST I HAD THE NIGHT BEFORE AND HOW LONG I HAD BEEN ON DUTY. I TOLD HIM BOTH AND HE SAID HE DIDN'T SEE ANY PROB WITH ME FLYING THE TRIP. SINCE THE SCHEDULER WAS USING THE COMPANY'S FOS COMPUTER SYS, WHICH IS SUPPOSED TO GENERATE AN ALERT IF A TRIP IS ILLEGAL. I HAD NO REASON TO DOUBT HIM, SO I ACCEPTED THE TRIP. ABOUT HALFWAY TO THE DEST I STARTED THINKING ABOUT THE AMOUNT OF HRS I HAD FLOWN. ADDING UP MY TIMES FOR THE PREVIOUS 5 LEGS I CAME UP WITH 7.0 HRS. SINCE THE LEG I WAS FLYING WAS SCHEDULED FOR 1.5 HRS AND THE MAX IS 8 HRS, IT WAS OBVIOUS THAT THE TRIP WAS ILLEGAL. I CALLED THE SCHEDULER WHEN I GOT ON THE GND AND ASKED HIM TO ADD MY TIMES, AND HE CONFIRMED THAT THE TRIP WAS ILLEGAL. I ASKED WHY THE FOS DIDN'T GENERATE AN ALERT, AND WAS TOLD THE ALERT CAME UP ON THE WRONG DAY AND THAT THE PROGRAM STILL HAD SOME BUGS IN IT. MY SOLUTION, FROM NOW ON, IS TO CHK THE LEGALITY OF A TRIP MYSELF AND NOT RELY ON A COMPUTER PROGRAM.

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.