Narrative:

We took off from ZZZZ; and I was flying as I was doing IOE. The takeoff was normal and non-eventful; and we had good weather. After takeoff; when [captain] was bringing up the flaps; we got an le flaps asym message; and [captain] elected to take over flying. I ran the QRH procedure. We leveled off to flight level 180 to stay below the 20;000 foot flap restriction boeing has. We also kept speed below 250 to avoid over speeding the flaps. While flying; we discussed the possibility of going to ZZZZ1; but decided to land at ZZZZ again as we thought it was the safest and most prudent decision due to the longer runway; and closer proximity and not needing to fly away from a perfectly good long runway. We also knew that we would have a very high vref speed as the QRH instructed us to use Vref30+30 for landing. We had also noted our fuel burn at that level was most likely far too high to reach ZZZ; and that it wouldn't be smart or safe to fly an airplane with a flight control malfunction all the way to ZZZ even if fuel wouldn't have been a factor. We informed ATC of our desire to return to ZZZZ and landed safely in a fast but uneventful landing. I commend the captain for getting us on the ground safely; and being able to make the landing well within the runway distance available. I also believe that as a crew we made the safest decision possible with the information we had.

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Original NASA ASRS Text

Title: B767 pilot reported experiencing a leading edge flap asymmetry during flap retraction after takeoff; resulting in a return to the departure airport.

Narrative: We took off from ZZZZ; and I was flying as I was doing IOE. The takeoff was normal and non-eventful; and we had good weather. After takeoff; when [Captain] was bringing up the flaps; we got an LE FLAPS ASYM message; and [Captain] elected to take over flying. I ran the QRH procedure. We leveled off to flight level 180 to stay below the 20;000 foot flap restriction Boeing has. We also kept speed below 250 to avoid over speeding the flaps. While flying; we discussed the possibility of going to ZZZZ1; but decided to land at ZZZZ again as we thought it was the safest and most prudent decision due to the longer runway; and closer proximity and not needing to fly away from a perfectly good long runway. We also knew that we would have a very high Vref speed as the QRH instructed us to use Vref30+30 for landing. We had also noted our fuel burn at that level was most likely far too high to reach ZZZ; and that it wouldn't be smart or safe to fly an airplane with a flight control malfunction all the way to ZZZ even if fuel wouldn't have been a factor. We informed ATC of our desire to return to ZZZZ and landed safely in a fast but uneventful landing. I commend the Captain for getting us on the ground safely; and being able to make the landing well within the runway distance available. I also believe that as a crew we made the safest decision possible with the information we had.

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.