One cluster of files related to the air data module had been revised seven times in 5 months. Each revision was small, technical, easy to overlook. Each one moved the documentation a little further away from what was actually installed on the aircraft.
And every single revision carried the same final approval signature.
Dorian Voss.
Vivien stared at the name for a long time.
"It could be his credentials without it being him," she said finally. "I've seen people ruined over a login. I won't do that to anyone. Not even him. I need to know what the system is actually doing before I point at anyone."
So Caleb dug into the flight software itself.
When Vivien woke on the couch at 5:00 in the morning, he was still at the table, the laptop glow on his face.
He didn't look tired. He looked afraid.
"Show me," she said.
He turned the screen toward her.
Buried inside the monitoring software was a small block of code that did not appear in any of the approved design documents. It was elegant. Almost invisible.
When the air data module reported a fault, this block of code intercepted the signal before it could reach the ground telemetry system. It replaced the fault with a clean reading.
On the aircraft, the warning light would stay dark. On the ground, every monitor in the control center would show the same single word.
Normal.
Vivien went very still.
"So if the sensor fails in flight, the pilots get bad numbers and no warning. The engineers on the ground see a perfect aircraft."
"Nobody knows anything is wrong."
Caleb's voice was quiet and precise.
"Until it's too late to matter."
"And if you're right about this..."
He looked at her.
"Then one day, a plane takes off with people on it, and nobody on Earth knows it's already in trouble."
Vivien walked to the window. When she turned around, her mind was made up.
In 11 days, the Meridian was scheduled for a demonstration flight before Transcontinental Regional Airlines, which was preparing to order 120 aircraft. The largest contract in company history.
She was going to cancel it.
* * *
That afternoon, she called an emergency executive session by video.
On the screen, a grid of faces appeared. Dorian Voss, from his office at Harland Field. And in the center square, in the Chicago boardroom, Gideon Price.
Gideon was 56, silver-haired, and chairman of the board.
He had been her father's closest adviser. And when her father died, he had told the board she wasn't ready.
They had overruled him. He had never forgiven them.
Vivien laid out the findings. She was concise and clear. The unapproved module. The deleted report. The code.