He had written three words in neat, deliberate block letters: SEE YOU IN THE TRENCH. Below the words lay a small plastic key, flat and brass-plated, with the number 4B stamped into the bow. It was the key to the crew baggage hold behind the forward lavatory—the one compartment on the entire Boeing airframe that could be unlatched from the cabin without sounding a chime on the purser’s station. I stared at the key in my palm, then looked back at Mara through the doorway. "How many people were assigned to deadhead in the crew rest bunks tonight?" I asked. Mara's eyes went wide. She looked down at the floorboards between her feet, where the vibration of the lower baggage bay hummed through the soles of her shoes.
"Three," she said. Her voice broke on the final syllable. "Two pilots from the cargo run... and one ground mechanic hitching a transfer to Lisbon."Mara didn't check a tablet; she didn't have one that worked with the primary cabin network down. She reached into her apron pocket, her fingers trembling against a folded slip of blue carbon paper—the purser’s manual gate manifest signed off at Terminal 4. Her thumb dragged down the cramped handwriting under the deadhead block. "Gerald Covington," she whispered. "Seat assignment was supposed to be 34K in the rear. But the gate agent wrote a line through it. Pen note says: Moved to crew rest 4B per Queens maintenance dispatch."
"He never sat in coach," I said. "He walked through the service door before the boarding doors even closed, dropped his gear in the lower compartment, and locked himself inside the fuselage core." The implications locked into place with the precision of an engine housing. The tainted cockpit air wasn't an airborne virus or an accidental engine bleed failure. The mixer valve that fed conditioned air to the flight deck passed through the forward lower avionics shelf, directly adjacent to the crew rest bunk. Anyone sitting in 4B had physical access to the distribution manifold. A three-inch brass valve, turned forty-five degrees to starboard, isolated the flight deck line from the passenger cabin scrubbers and allowed whatever can of industrial defoliant or organophosphate solvent he had carried inside his toolkit to bleed straight into the pilots' oxygen regulators.
Beside me, Captain Thomas groaned, his chin rolling off the glare shield. His right hand twitched against his thigh, fingers curling into an empty fist. A strand of gray saliva hung from the corner of his lips. "Thomas," I said, leaning close to his ear. "I need your authority. The master override for the avionics bay hatch. Is it keyed to the purser’s emergency code, or is there an internal deadbolt?" "Manual... deadbolt," he wheezed. His eyelids fluttered, revealing eyes almost entirely swallowed by pinprick pupils. "Inside the bay... ground crew lock... for pressurization checks." "Which means nobody enters from above unless he draws the bolt," I said.
"Bennett..." He gripped the fabric of my coat sleeve with sudden, desperate strength. "The trench. He’s aiming... for the Laurentian Fan. Five thousand fathoms. If the plane hits the water out there... the black boxes... never recover." "He isn't going to ditch this aircraft," I said, though my stomach tightened against the cold reality of the instrument panel. On the analog standby compass, our heading had settled onto sixty-two degrees east-northeast, curving far north of the standard Azores tracks toward the deep oceanic void between Newfoundland and Ireland. The aircraft wasn't plummeting; it was being stepped down. The flight management system, slaved to the bypass module under the throttles, was executing a calculated step-descent: thirty-nine thousand, down to thirty-five, now reading thirty-two on the barometric standby altimeter. A gradual descent that wouldn't trigger the cabin pressure drop alarms or blow the masks out of the passenger ceiling units, but would drop us beneath military radar horizons within thirty minutes.
I turned back to the threshold. Mara was watching the dark aisle beyond the drawn curtain. "Elena Vargas," I said. "The woman from row eight who collapsed an hour after takeoff. Where was she when she fell?" Mara blinked, trying to assemble the sequence through the mounting panic. "She... she went to use the forward lavatory right after the seatbelt sign clicked off. Right next to the 4B access door. She was banging on the partition, calling for water. She said someone had sprayed ammonia in the corridor." "She didn't get sick from food," I told her. "She inhaled the overspray when he opened the manifold valve. The doctor back there—what did he give her?"
"Oxygen," Mara said. "A portable bottle from the rear station. She’s awake now, but she can barely speak." "Go get that portable bottle," I ordered. "And get the purser. Tell him to bring the master galley key set and the heavy zip-ties from the restraint kit. Do not tell the passengers why. If business class smells fear, we lose the aisle, and if we lose the aisle, we lose the hatch." "What are you going to do?" "I’m going to cut his link from the outside," I said. "Before he locks the elevator cables." She turned and slipped through the curtain, her rubber-soled shoes silent against the runner carpet.
CHAPTER 5
I stood alone in the dark cockpit between the two unconscious men. The low vibration of the twin engines hummed through the soles of my shoes, steady and indifferent. Flight 271 was a four-hundred-thousand-pound machine flying blind over dark water, responding not to the seasoned hands slumped in its leather seats, but to a five-inch circuit board taped to an aluminum rib beneath my knee. I knelt on the floorboards, pulling the emergency axe close. The two copper leads from the bypass module did not run forward toward the windshield; they disappeared down through a narrow cable pass-through hole drilled directly into the deck plate beneath First Officer Miller's seat. Covington hadn't just wired into the flight computer; he had hard-spliced the unit into the secondary digital data bus that routed down to the lower electronics rack.