Whoever built it wrong would be finished. Marcus knew all of this. Not because anyone told him. Nobody told the janitor anything. He knew it because he listened.
He heard the engineers argue at midnight when they thought the building was empty. He heard the way their voices climbed with panic and dropped with exhaustion. He heard the same three words over and over spoken like a a The vibration problem. And on that particular morning as he ran his mop in slow even strokes beneath the aircraft's tail, Marcus heard it himself. He froze.
His head tilted just slightly, the way a doctor's does when he hears something wrong in a heartbeat. A hum. Low. Almost too low to notice. Coming from the rotor mast assembly, resonating down through the airframe in a pattern he recognized the way you recognize an old enemy's footsteps.
He set the mop against the wall. He walked slowly around the tail, one hand hovering an inch from the fuselage feeling the air the way another man might read braille. And then he did something he almost never did. He spoke. "That's not a bearing. " Marcus said quietly to no one.
"That's harmonic. That's the mast. " "Excuse me. " Marcus turned. A young engineer stood behind him. Maybe 26 glasses, coffee gone cold in his hand. Dark circles under his eyes from a week of no sleep.
His badge read D. Okafor, structural. Marcus lowered his gaze immediately. Three years of survival had taught him that a maintenance man who spoke his mind did not stay employed long. "Sorry. " Marcus said.
"I'll finish up over here. " "No, wait. " The young man stepped closer. "What did you just say about the mast? " "Nothing. I don't I just clean, sir. " The engineer studied him. And something in the way Daniel Okafor looked at him made Marcus pause. It wasn't the look the others gave him.
It wasn't contempt. It was something else. Curiosity. "You said it was harmonic. " Daniel said slowly. "We've been calling it a bearing failure for 3 weeks.