The outer door screeched open a third time, revealing Bors and Conrad's hulking forms. Sienna offered each of them a hand as well, stealing a quick glance at Conrad's makeshift rebreather and goggles to be sure he had everything where it was supposed to be. He seemed to be having no difficulty breathing at the moment. She flashed him an hesitant "thumbs up" to confirm it, asking her silent question with a single interrogative nod.
She waved the last two member away from the hatch and started to cycle it shut again, but her hand hovered a few inches off the handle set in the catwalk, a thought occurring to her. She looked around on the grating behind her, spotting the snapped-off cover she'd discarded from the outer release valve. Snatching it up, she slid her backpack off of her shoulders and dropped it to the walkway. Reaching into one of the small side pouches, she withdrew a folding utility knife, opening it to reveal a simple pair of pliers. Working quickly, she pinched the cover door along a corner with the pliers, gripping the tool in one hand and the cover in the other. Biting down on her rebreather's mouthpiece hard with the effort, she grunted a little as she bent the little cover's corners down into a triangular wedge. On the opposite side she bent the end upwards and back on itself, folding it until there was a flap about an inch and a half long doubled back onto the body, sitting a few degrees inward from perpendicular.
She pulled out a pair of insulated work gloves and flipped over onto her stomach, sliding up to the open airlock and leaned inside, bent over at the waist on the corner so that her legs were flat against the walkway, her torso hanging inside the airlock chamber. Retracting the pliers and flipping open a small knife blade, she felt around the inner lock valve until she found a tighter cover plate secured just below the handle with rusted screws. Jamming the knife blade into the screw heads, she jiggled each of the four screws on the corners until they broke free from their rust, dropping them one by one to the closed bottom hatch with a quiet clatter. With the last one withdrawn, she shoved the point of the blade along each side of the cover panel, jimmying it, gently coaxing it free from its stubborn resting place.
After less than a minute of effort, the plate finally broke free, revealing a jumbled mishmash of wires of all colors crisscrossing a surprisingly pristine circuit board. She shook her head and sighed through her mask. What a disorganized, hopeless mess. Good thing she wasn't interested in sorting it out.
Grabbing a hold of as many of the mess of wires as she could get her gloved hand around, she wrenched them free, some of them tearing the soldered contact points out of the circuit board with it. With a few blue sparks, the lights inside the airlock all turned orange and started to flash. A monotonous, droning beep came through the klaxon within, accompanied by the same broken voice repeating its message: "Airlock malfunction. Contact maintenance personnel. Seek alternate route."
Taking the metal wedge she'd fashioned, she placed the point in the middle of the circuit board, lightly tapping on the makeshift "nails head" she'd created on the opposite end with the handle of her utility knife. Gently she drove it through the fragile board's carbon fiber surface. The combination of the blood rushing to her head as she hung there nearly upside down and the annoying klaxon's constantly repeating message making her both a little irate and dizzy, she finally got it driven in far enough so that she could let it go without it falling out.
Dragging herself out of the lock, she sat up on the catwalk, taking a breath as her circulation rebalanced itself, her face feeling like it started to deflate again. Once she'd regained her vision, she turned around on her bottom, shimmying over to the edge once more and descended one or two rungs down the ladder into the lock.
With her boots right at the level of the wedge she'd driven in, she reared one of her feet back and delivered a sharp kick as hard as she could straight into the end of her homemade spike. It rammed straight through the circuit board, shattering it to pieces and crunching into several other unseen electronic and mechanical parts hidden behind it. Blue, white and yellow sparks flew everywhere with a sudden, startling zapping sound, and almost immediately all of the lights in the airlock went out, the klaxon's endless droning silenced.
She climbed back out of the airlock, putting her tools back into her backpack, and heaved it back onto her shoulders as she looked up to the sickly yellow sky. This was it, she'd done everything she knew to do. It was up to them to uphold their end of the bargain now.