Boeing Co. is reducing its 787 widebody production to five jets monthly in mid-2021 from six, and delivered zero 787s to customers in November, as longer-haul travel demand remains weakened by the coronavirus pandemic, the U.S. planemaker's Chief Financial Officer said on Friday.

Boeing's Greg Smith also told a conference that there is no "normal profile" currently for jet pre-delivery payments or PDPs, which are tied to production rates.

Boeing (BA) has been forced to cut production due to the 20-month grounding of its cash cow 737 MAX after fatal crashes and the pandemic downturn.

"I think we've got a couple years here where PDPs will be a little bumpy," Smith said.