Narrative:

Inadvertently accepted extension of flying duty that exceeded maximum allowable hours flown for the rest period I had. This trip usually includes 5.4 hours on first day and 3.5 hours second day scheduled flying, with an 8 hour rest period. This trip was shortened by 2 legs on second day and scheduled that way. Scheduled to 2.1 second day. Scheduling asked me on morning of second day if I would fly those 2 legs that we usually fly. At that point, the hours that I'd flown plus the hours they now wanted me to fly now exceeded 9 hours requiring a minimum of 9 hours rest, but I only had 8 hours rest. I did not think this would be a rest problem because we are nearly always scheduled for those last 2 legs anyway and we usually exceed 9 hours of actual flying time and that is within legal rest because it is scheduled for less than 9 hours flying time and 8 hours rest. I overlooked this because we always fly exactly those flts with exactly that rest period everyday, and remain legal because rest requirements are based on scheduled hours flown, not actual hours flown. How one can do the exact same thing twice and be correct one time and not correct the other time does not seem consistent.

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Original NASA ASRS Text

Title: AN ACR BA31 CAPT FLEW BEYOND HIS ALLOWABLE LEGAL FLT TIME VERSUS HIS REST TIME WHEN HE AGREED TO BE RESCHEDULED.

Narrative: INADVERTENTLY ACCEPTED EXTENSION OF FLYING DUTY THAT EXCEEDED MAX ALLOWABLE HRS FLOWN FOR THE REST PERIOD I HAD. THIS TRIP USUALLY INCLUDES 5.4 HRS ON FIRST DAY AND 3.5 HRS SECOND DAY SCHEDULED FLYING, WITH AN 8 HR REST PERIOD. THIS TRIP WAS SHORTENED BY 2 LEGS ON SECOND DAY AND SCHEDULED THAT WAY. SCHEDULED TO 2.1 SECOND DAY. SCHEDULING ASKED ME ON MORNING OF SECOND DAY IF I WOULD FLY THOSE 2 LEGS THAT WE USUALLY FLY. AT THAT POINT, THE HRS THAT I'D FLOWN PLUS THE HRS THEY NOW WANTED ME TO FLY NOW EXCEEDED 9 HRS REQUIRING A MINIMUM OF 9 HRS REST, BUT I ONLY HAD 8 HRS REST. I DID NOT THINK THIS WOULD BE A REST PROB BECAUSE WE ARE NEARLY ALWAYS SCHEDULED FOR THOSE LAST 2 LEGS ANYWAY AND WE USUALLY EXCEED 9 HRS OF ACTUAL FLYING TIME AND THAT IS WITHIN LEGAL REST BECAUSE IT IS SCHEDULED FOR LESS THAN 9 HRS FLYING TIME AND 8 HRS REST. I OVERLOOKED THIS BECAUSE WE ALWAYS FLY EXACTLY THOSE FLTS WITH EXACTLY THAT REST PERIOD EVERYDAY, AND REMAIN LEGAL BECAUSE REST REQUIREMENTS ARE BASED ON SCHEDULED HRS FLOWN, NOT ACTUAL HRS FLOWN. HOW ONE CAN DO THE EXACT SAME THING TWICE AND BE CORRECT ONE TIME AND NOT CORRECT THE OTHER TIME DOES NOT SEEM CONSISTENT.

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.