Narrative:

We had a pickup of XA10 for a XD40 departure local time. We arrived at the airport approximately one hour and 25 minutes before sign in time. Doing the preflight I discovered signs of engine oil leaking from the left engine. After reporting it to maintenance and [making] an appropriate [entry] in the logbook maintenance [and after] talk with maintenance control decided we needed to do an engine run and leak check. Maintenance advised us that to do this check; all passengers have to deplane the aircraft. We perform[ed] the procedure and then all passengers were re-boarded. Taxiing out we discovered that we were reaching [our operating] time limit without an extension. We all decided that we would do a 30 minute extension and continue to destination. The takeoff and en route was uneventful.the captain made it mandatory that the pilot flying would take the last break. He was quoting far 117 that states that the pilot flying will have two hours available to him duing the last half of the flight. The first officer; the pilot flying; said that he would prefer the second break because it took him longer to wake up. The captain told him to come back early. At top of climb I did the breaks shorting them to allow the first officer to come back 40 minutes early. I took the first break and got very little sleep at all. After my break I came up and relieved the captain for the second break. Everything was uneventful up to the point of the approach. Approach gave us vectors and radar descent to final. As they gave us a turn to the base leg they turned us inside the outer marker and told us to maintain 170 knots to the FAF. The first officer also used vertical speed of 1500 feet/minute to get down to the glideslope and we arrived there approximately 1000 feet slightly above the glideslope. Completed the approach on the glideslope and landed uneventfully the pilot flying should have the opportunity to select which break that he would prefer. Everyone knows their body and their sleep patterns. Some people like the last break and then wake up just fine. Some people take longer to wake up.

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Original NASA ASRS Text

Title: Two B777 First Officers reported questioning the Captain's interpretation of FAR 117 that he believed requires the pilot flying to take the last break. The flying First Officer preferred the second break citing 'sleep inertia' but complied with the Captain's wishes.

Narrative: We had a pickup of XA10 for a XD40 departure local time. We arrived at the airport approximately one hour and 25 minutes before sign in time. Doing the preflight I discovered signs of engine oil leaking from the left engine. After reporting it to maintenance and [making] an appropriate [entry] in the logbook maintenance [and after] talk with Maintenance Control decided we needed to do an engine run and leak check. Maintenance advised us that to do this check; all passengers have to deplane the aircraft. We perform[ed] the procedure and then all passengers were re-boarded. Taxiing out we discovered that we were reaching [our operating] time limit without an extension. We all decided that we would do a 30 minute extension and continue to destination. The takeoff and en route was uneventful.The captain made it mandatory that the pilot flying would take the last break. He was quoting FAR 117 that states that the pilot flying will have two hours available to him duing the last half of the flight. The first officer; the pilot flying; said that he would prefer the second break because it took him longer to wake up. The captain told him to come back early. At top of climb I did the breaks shorting them to allow the first officer to come back 40 minutes early. I took the first break and got very little sleep at all. After my break I came up and relieved the captain for the second break. Everything was uneventful up to the point of the approach. Approach gave us vectors and radar descent to final. As they gave us a turn to the Base leg they turned us inside the outer marker and told us to maintain 170 knots to the FAF. The First Officer also used vertical speed of 1500 feet/minute to get down to the glideslope and we arrived there approximately 1000 feet slightly above the glideslope. Completed the approach on the glideslope and landed uneventfully The pilot flying should have the opportunity to select which break that he would prefer. Everyone knows their body and their sleep patterns. Some people like the last break and then wake up just fine. Some people take longer to wake up.

Data retrieved from NASA's ASRS site 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.