Originally Posted by Globaliser
747s are often loaded and unloaded on jetways that connect to 1L and 2L, so two doors can be used. In fact, the Google satellite picture of HND shows quite a few of these, although I couldn't see any aircraft using 1L and 1R simultaneously.
Hi Globaliser:
I fly UA metal almost exclusively and most of my mileage is on long haul 747s. Agree with your 1L 2L statement completely. The novelty for me here was the OP's apparent suggestion of the L and R case you mentioned.