Translation of "этапах" in English

подключается к работе на лёгких и безопасных этапах

getting involved in easy, safe parts of the work

По-видимому, большинство авиакатастроф происходит на этапах посадки и взлёта.

- They say most airplane accidents occur at landing or takeoff stages.
- Most airplane accidents allegedly occur at landing or takeoff stages.
- As is being said, most airplane accidents occur at landing or takeoff stages.