This is a very interesting and unique mission in which you get to travel between past and the present. The mission is divided into 3 chapters containing total eight collectible pilot helmets.
chapter 1 contains 2 Helmets
chapter 2 contains 6 Helmets
chapter 3 contains 0 Helmets
Timestamp for Pilot Helmets have been highlighted in the timestamps below.
00:05 – Arriving at Anderson’s Rally Point
00:51 – BT explains the reason for space time distortion
02:49 – Rejoin BT
03:15 – Pilot Helmet 1 of 2 and 2 of 2 (Collectible)
04:22 – Take Major Anderson’s Helmet
05:11 – Return Helmet to BT. See Pilot log
06:59 – Use Zipline to access the complex
08:43 – Take Major Anderson’s wrist mounted device to control time shift
10:48 – Pilot Helmet 1 of 6 (Collectible)
12:07 – Pilot Log
13:06 – Pilot Helmet 2 of 6 (Collectible)
13:59 – Pilot Log
15:04 – Pilot Helmet 3 of 6 (Collectible)
16:29 – Pilot Helmet 4 of 6 (Collectible)
19:19 – Pilot Helmet 5 of 6 (Collectible)
20:00 – Pilot Helmet 6 of 6 (Collectible)
21:01 – Last Pilot Log of Anderson
23:30 – Get back to BT
24:37 – New Titan Loadout (Ion)
25:10 – Scan the ark at the center of fold weapon prototype
25:47 – Time stops