Narrative:

Fatigue without relief pilot. During my last trip to ogg (flight X) and my return to ZZZ (fly Y) some fatigue issues arose. The trip was not scheduled to have a relief pilot because of contractual flight time limits (any flight under 8 hours). Limits that were just changed. My previous 2 trips to this location this month had a relief pilot on board. The ogg arrival was basically uneventful and we got to the hotel around XA00 pm. I went for a run. I then returned to the hotel, went to eat, and was asleep by XE45 pm. I was wakened by the sun shining in my room around XC30 am. The rest of the morning was spent visiting the island. I got back to my room around XL00 pm and took a nap. I then took a shower and made a pot of coffee, getting ready for our XN25 pm pick-up for the XP10 pm departure to ZZZ. About 4 or 5 mi from the airport, the van driver told the captain that operations had just called and that there was a maintenance delay. We would now depart at XU00 pm. We then returned to the hotel and reset for another pick-up at XT00 pm. Having already had a few cups of coffee, I knew that another nap would not be possible. I received another call later -- again rescheduling our pick-up time. I began to realize how long this trip was going to be for both myself and the captain without a relief pilot on board. After finally arriving at the airport things were uneventful. We departed for ZZZ at __00 pm after a scheduled departure time of XP10 pm. Having no relief pilot on board, plus flying on 'the back side of the clock,' both I and the captain were very tired. I'm not proud to say that at some point over the ocean, I must have fallen asleep for a short period of time. This occurrence has greatly disturbed me. The captain agreed with me that we both needed a nap in order to be rested for the safe operation of the aircraft. He told me to take a nap in my seat if I needed one, and that he would stay awake. In the essence of safety he felt that he also needed a rest period as well, but could wait until over lax or close to that area. At no time were we both sleeping simultaneously. We arrived at ZZZ at XA32 am. I know that contractually no relief pilot is required on flts under 8 hours, but with 'flying on the back side of the clock' compounded, in this instance, with a lengthy maintenance delay just does not pass the common sense test. We are for the most part goal-oriented people. We want to get the job done for the passenger and the crew members alike. We need to take a hard look at returning the relief pilot to flts that truly need them. ZZZ departures to ogg and hnl -- both with scheduled flying times of slightly under 8 hours -- are 2 such flts. Supplemental information from acn 514967: our flight Y ogg to zz was scheduled to depart ogg at XP10 pm with an XN25 pm pick-up at the hotel. Roughly 10 mins before arrival at the airport, the van driver received a phone call from our air carrier operations that our flight had been delayed due to mechanical problems and that our new departure would be at XU30 pm with an XT00 pm pick-up. We returned to the hotel. At approximately XR30 pm, I received a call from our air carrier operations that the part had arrived earlier than expected and could I round up my crew and return to the airport. At approximately XS30 pm we again departed for the airport. After completing all preflight duties, the flight departed at XU00 pm (scheduled departure XP10 pm arrival ZZZ XI01 am). We were in constant chop (light to moderate) for the first 3 hours. We arrived in dfw almost 4.5 hours after scheduled arrival. Flying all night and dealing with at least 3 hours light to moderate chop and with no scheduled break is not a good operation. Without question, fatigue was a factor on this flight. This is a legal 2-MAN operation, but not a wise one in my estimation. The relief pilot needs to be reinstated on this flight and flts like this.

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Original NASA ASRS Text

Title: B767 CREW WAS GIVEN A NEW DEP TIME BY THE ACR AFTER THEY WERE ALMOST AT THE ARPT.

Narrative: FATIGUE WITHOUT RELIEF PLT. DURING MY LAST TRIP TO OGG (FLT X) AND MY RETURN TO ZZZ (FLY Y) SOME FATIGUE ISSUES AROSE. THE TRIP WAS NOT SCHEDULED TO HAVE A RELIEF PLT BECAUSE OF CONTRACTUAL FLT TIME LIMITS (ANY FLT UNDER 8 HRS). LIMITS THAT WERE JUST CHANGED. MY PREVIOUS 2 TRIPS TO THIS LOCATION THIS MONTH HAD A RELIEF PLT ON BOARD. THE OGG ARR WAS BASICALLY UNEVENTFUL AND WE GOT TO THE HOTEL AROUND XA00 PM. I WENT FOR A RUN. I THEN RETURNED TO THE HOTEL, WENT TO EAT, AND WAS ASLEEP BY XE45 PM. I WAS WAKENED BY THE SUN SHINING IN MY ROOM AROUND XC30 AM. THE REST OF THE MORNING WAS SPENT VISITING THE ISLAND. I GOT BACK TO MY ROOM AROUND XL00 PM AND TOOK A NAP. I THEN TOOK A SHOWER AND MADE A POT OF COFFEE, GETTING READY FOR OUR XN25 PM PICK-UP FOR THE XP10 PM DEP TO ZZZ. ABOUT 4 OR 5 MI FROM THE ARPT, THE VAN DRIVER TOLD THE CAPT THAT OPS HAD JUST CALLED AND THAT THERE WAS A MAINT DELAY. WE WOULD NOW DEPART AT XU00 PM. WE THEN RETURNED TO THE HOTEL AND RESET FOR ANOTHER PICK-UP AT XT00 PM. HAVING ALREADY HAD A FEW CUPS OF COFFEE, I KNEW THAT ANOTHER NAP WOULD NOT BE POSSIBLE. I RECEIVED ANOTHER CALL LATER -- AGAIN RESCHEDULING OUR PICK-UP TIME. I BEGAN TO REALIZE HOW LONG THIS TRIP WAS GOING TO BE FOR BOTH MYSELF AND THE CAPT WITHOUT A RELIEF PLT ON BOARD. AFTER FINALLY ARRIVING AT THE ARPT THINGS WERE UNEVENTFUL. WE DEPARTED FOR ZZZ AT __00 PM AFTER A SCHEDULED DEP TIME OF XP10 PM. HAVING NO RELIEF PLT ON BOARD, PLUS FLYING ON 'THE BACK SIDE OF THE CLOCK,' BOTH I AND THE CAPT WERE VERY TIRED. I'M NOT PROUD TO SAY THAT AT SOME POINT OVER THE OCEAN, I MUST HAVE FALLEN ASLEEP FOR A SHORT PERIOD OF TIME. THIS OCCURRENCE HAS GREATLY DISTURBED ME. THE CAPT AGREED WITH ME THAT WE BOTH NEEDED A NAP IN ORDER TO BE RESTED FOR THE SAFE OP OF THE ACFT. HE TOLD ME TO TAKE A NAP IN MY SEAT IF I NEEDED ONE, AND THAT HE WOULD STAY AWAKE. IN THE ESSENCE OF SAFETY HE FELT THAT HE ALSO NEEDED A REST PERIOD AS WELL, BUT COULD WAIT UNTIL OVER LAX OR CLOSE TO THAT AREA. AT NO TIME WERE WE BOTH SLEEPING SIMULTANEOUSLY. WE ARRIVED AT ZZZ AT XA32 AM. I KNOW THAT CONTRACTUALLY NO RELIEF PLT IS REQUIRED ON FLTS UNDER 8 HRS, BUT WITH 'FLYING ON THE BACK SIDE OF THE CLOCK' COMPOUNDED, IN THIS INSTANCE, WITH A LENGTHY MAINT DELAY JUST DOES NOT PASS THE COMMON SENSE TEST. WE ARE FOR THE MOST PART GOAL-ORIENTED PEOPLE. WE WANT TO GET THE JOB DONE FOR THE PAX AND THE CREW MEMBERS ALIKE. WE NEED TO TAKE A HARD LOOK AT RETURNING THE RELIEF PLT TO FLTS THAT TRULY NEED THEM. ZZZ DEPS TO OGG AND HNL -- BOTH WITH SCHEDULED FLYING TIMES OF SLIGHTLY UNDER 8 HRS -- ARE 2 SUCH FLTS. SUPPLEMENTAL INFO FROM ACN 514967: OUR FLT Y OGG TO ZZ WAS SCHEDULED TO DEPART OGG AT XP10 PM WITH AN XN25 PM PICK-UP AT THE HOTEL. ROUGHLY 10 MINS BEFORE ARR AT THE ARPT, THE VAN DRIVER RECEIVED A PHONE CALL FROM OUR ACR OPS THAT OUR FLT HAD BEEN DELAYED DUE TO MECHANICAL PROBS AND THAT OUR NEW DEP WOULD BE AT XU30 PM WITH AN XT00 PM PICK-UP. WE RETURNED TO THE HOTEL. AT APPROX XR30 PM, I RECEIVED A CALL FROM OUR ACR OPS THAT THE PART HAD ARRIVED EARLIER THAN EXPECTED AND COULD I ROUND UP MY CREW AND RETURN TO THE ARPT. AT APPROX XS30 PM WE AGAIN DEPARTED FOR THE ARPT. AFTER COMPLETING ALL PREFLT DUTIES, THE FLT DEPARTED AT XU00 PM (SCHEDULED DEP XP10 PM ARR ZZZ XI01 AM). WE WERE IN CONSTANT CHOP (LIGHT TO MODERATE) FOR THE FIRST 3 HRS. WE ARRIVED IN DFW ALMOST 4.5 HRS AFTER SCHEDULED ARR. FLYING ALL NIGHT AND DEALING WITH AT LEAST 3 HRS LIGHT TO MODERATE CHOP AND WITH NO SCHEDULED BREAK IS NOT A GOOD OP. WITHOUT QUESTION, FATIGUE WAS A FACTOR ON THIS FLT. THIS IS A LEGAL 2-MAN OP, BUT NOT A WISE ONE IN MY ESTIMATION. THE RELIEF PLT NEEDS TO BE REINSTATED ON THIS FLT AND FLTS LIKE THIS.

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.