Answer: Step 1 - EV1 & EV2 exit airlock.


The list of steps in the corresponding spacewalk mission:
Step 1 - EV1 & EV2 exit airlock.
Step 2 - EV2 move to P4.
Step 3 - EV1 follow EV2 outward.
Step 4 - EV2 stow strut bag.
Step 5 - EV1 setup and install WIfEx.
Step 6 - EV1 & EV2 assemble upper triangle.
Step 7 - EV1 enter foot restraint.
Step 8 - EV2 hand EV1 upper triangle.
Step 9 - EV1 install upper triangle.
Step 10 - EV1 exit foot restraint and tilt it to the left.
Step 11 - EV1 enter foot restraint and receive strut.
Step 12 - EV1 & EV2 install lower left strut.
Step 13 - EV1 & EV2 install mid left strut.
Step 14 - EV2 collect tools and prepare for right side.
Step 15 - EV1 enter foot restraint and receive strut.
Step 16 - EV1 & EV2 install lower right strut.
Step 17 - EV1 & EV2 install mid right strut.
Step 18 - EV1 & EV2 install multi-layer insulation.
Step 19 - EV1 exit foot restraint and begin cleanup.
Step 20 - EV1 & EV2 hand off tools.
Step 21 - EV2 retrieve foot restraint.
Step 22 - EV1 return to airlock.
Step 23 - EV1 exchange strut bag for spare FPMU.
Step 24 - EV2 move to P1 FPMU.
Step 25 - EV2 install electrical inhibitor.
Step 26 - EV2 install foot restraint and enter it.
Step 27 - EV1 move to P1 FPMU.
Step 28 - EV1 stow spare FPMU.
Step 29 - EV2 release ORU.
Step 30 - EV1 swap failed FPMU for new one.
Step 31 - EV1 & EV2 reinstall ORU.
Step 32 - EV1 stow old FPMU on BRT.
Step 33 - EV1 return to airlock and stow old FPMU.
Step 34 - EV2 clean up worksite.
Step 35 - EV2 stow foot restraint.
Step 36 - EV2 return to airlock.
Step 37 - EV1 & EV2 enter airlock.
