Yamal Airlines has returned its Boeing 737s to revenue service after completing elevator checks.
On 17 January, the Russian carrier grounded three -400 and six -500 variants to evaluate the risk of spontaneous deviation or jamming of the elevator.
It says the precautionary inspection has not identified any defects compromising safety, and its entire 737 fleet is in operation again.
Yamal had withdrawn these aircraft from service in the wake of the Tatarstan Air’s Boeing 737 crash at Kazan airport on 17 November.
Russian investigators have yet to reach conclusions over the cause of the accident, during which the 737-500 sharply dived into the ground while executing a go-around.