This is the seventh mission and contains total three collectible pilot helmets. Timestamps for the pilot helmet have been highlighted below
01:00 – Fight your way through the enemy Titans, Robots & soldier
07:10 – Pilot Helmet 1 of 3 (Collectible)
11:02 – Pilot Helmet 2 of 3 (Collectible)
11:40 – Get on to the lift with Sarah Briggs
12:13 – Retrieve the Ark from IMS Draconis before it lifts off
12:34 – Pilot Helmet 3 of 3 (Collectible)
13:10 – Fight with the wave of enemies
22:27 – Draconis lifts off with the Ark