United Airlines is asking pilots to take unpaid time off next month, citing late-arriving aircraft from Boeing, according to a note sent to pilots.

It’s another example of how Boeing’s customers say the manufacturer’s production problems and safety crisis are impacting their growth plans. The offer comes after United and other airlines in recent years have clamored for more pilots when the Covid-19 pandemic travel slump ended and demand surged.

“Due to recent changes to our Boeing deliveries, the remaining 2024 forecast block hours for United have been significantly reduced,” the…