The figures pre-date the grounding of the 787 worldwide earlier this month by air regulators over a battery fault.

BBC: Boeing revenues hit record before Dreamliner grounding

The battery on one JAL plane caught fire, while an ANA flight had to make an emergency landing due to a battery fault.

BBC: Boeing revenues hit record before Dreamliner grounding

The pilots also received a warning that there was a fault in the battery system.

BBC: Top Japan airlines ground Boeing 787s after emergency

So far, the regulator has discovered that the Boston fire was caused by a short circuit within one of the cells of the plane's multi-cellular batteries, and that a fault in the battery's design allowed the resulting overheating to spread to the other cells.

BBC: Boeing 787 Dreamliner tests 'missed fire risk'

Japanese battery maker GS Yuasa has seen its shares fall 11% since 7 January when an electrical fire broke out on a JAL 787 at Logan International Airport in Boston, although they rebounded 1% on Monday as it became apparent the fault may not have been a pure battery problem.

BBC: Dreamliner: Japan and US probe battery maker