Chapter 6 - Twenty-Seven Minutes of Fuel
Sarah held the passenger manifest so tightly the paper bent between her fingers.
SEAT 14D — MITCHELL, REBECCA.
Captain Hayes stared at the name.
“You said your sister died twelve years ago.”
“She did.”
“You saw her body?”
Sarah did not answer.
That was the problem.
She had seen a coffin.
A flag.
Her mother collapsing against the front pew.
She had seen military officers standing too straight because nobody knew what to do with grief.
But Rebecca’s aircraft had gone down in the Pacific during a classified training mission.
There had been no body to identify.
Sarah looked toward the cockpit security monitor.
“Show me fourteen-D.”
Hayes switched camera views.
The cabin feed was grainy.
Rows twelve through sixteen appeared from a ceiling-mounted angle.
Seat 14D was occupied.
Gray jacket.
Dark hair.
Male.
Sarah stared.
“That’s the man who was with Marcus.”
Hayes nodded.
“So whoever updated the manifest wants us to believe he’s your dead sister.”
“Or someone used her identity to get him aboard.”
“That would have been caught at boarding.”
“Unless the manifest changed after boarding.”
Hayes looked down at the paper.
“It just did.”
Sarah turned toward the tablet.
The display had returned to the Halcyon interface.
VALIDATION CONFLICT ACCEPTED
AUTONOMOUS LOCKOUT SUSPENDED
Below it:
NEXT TEST PHASE PENDING
Sarah’s mouth tightened.
“Test.”
Hayes heard the disgust.
“We’re carrying two hundred eighty-six passengers and this thing calls it a test.”
Sarah set the manifest beside the tablet.
“No. Someone calls it a test.”
The aircraft jolted.
Both pilots looked forward.
This movement was different.
Not a roll.
Not delayed controls.
A brief vibration ran through the floor.
Then another.
Hayes checked the engine instruments.
“Engines stable.”
Sarah scanned the systems page.
“Hydraulics?”
“Normal.”
“Pressurization?”
“Normal.”
“Fuel?”
Hayes stopped.
Sarah saw his expression.
“What?”
He selected the fuel page.
The numbers appeared.
He stared at them.
Then checked again.
“That’s wrong.”
Sarah leaned closer.
Total fuel quantity had dropped.
Not by a few hundred pounds.
By thousands.
“What did you have ten minutes ago?”
“Enough for over three hours.”
“And now?”
Hayes looked at the totalizer.
“Two hours twenty.”
Sarah’s voice sharpened.
“You lost almost an hour of endurance in ten minutes?”
“According to the system.”
“Fuel flow?”
“Normal.”
“Then either the quantity indication is lying or fuel is leaving the airplane somewhere else.”
Hayes pulled up tank values.
Left main.
Right main.
Center.
All decreasing.
Not evenly.
The left main was falling fastest.
Sarah pointed.
“Left wing.”
Hayes checked imbalance.
Already climbing.
“Fuel leak.”
“Maybe.”
“You keep saying maybe.”
“Because Halcyon has been feeding us false information for twenty minutes.”
Hayes looked toward the left wing.
No direct visibility from the cockpit.
He picked up the interphone.
“Cabin supervisor.”
The woman answered immediately.
“Yes, Captain?”
“I need a visual inspection from the left-side windows. Rows twelve through twenty if possible. Do not tell passengers why.”
Sarah added:
“Look for mist, vapor, streaking, anything coming off the wing.”
The supervisor repeated the instruction.
Hayes transmitted to air traffic control.
“Shanwick Control, Flight 217 declaring PAN PAN. Possible fuel leak with flight-control abnormalities. Request immediate vectors toward nearest suitable diversion.”
Static.
Then the controller responded.
“Flight 217, roger PAN. Confirm persons on board and fuel endurance.”
Hayes looked at Sarah.
Then at the display.
“Two eight six souls. Fuel endurance presently approximately two hours, but decreasing abnormally.”
Sarah watched the numbers.
The left tank lost another forty pounds.
Then sixty.
Then one hundred.
Too fast.
Shanwick returned.
“Flight 217, nearest suitable major airport Shannon. Recommend turn zero-six-five.”
Sarah studied the navigation display.
“How long?”
Hayes calculated.
“At current altitude and speed, about forty-eight minutes.”
Sarah looked at the fuel page.
“We may not have forty-eight.”
The cabin supervisor called.
“Captain.”
Hayes answered.
“What do you see?”
“Passenger in row sixteen says there’s a white stream behind the left wing.”
Hayes and Sarah exchanged a look.
“Continuous?”
“Yes.”
Sarah reached for the handset.
“Can you safely get a photo?”
“I think so.”
“Send it to the flight deck.”
Thirty seconds later, an image appeared on the cockpit display.
Sarah enlarged it.
A thin white plume extended behind the left wing.
Hayes swore quietly.
“That’s fuel.”
Sarah agreed.
The leak was real.
The airplane was bleeding.
Hayes transmitted again.
“Shanwick, upgrade Flight 217 to MAYDAY. Confirmed fuel leak.”
The controller responded immediately.
“Flight 217, MAYDAY acknowledged. Turn right heading zero-six-five. Descend flight level two-eight-zero when able.”
Sarah looked at Hayes.
“Don’t descend yet.”
“Lower altitude puts us closer to landing.”
“Higher fuel burn.”
“We may need control margin.”
“Not yet.”
Hayes nodded.
He told ATC they would maintain altitude temporarily.
Sarah returned to the tablet.
The Halcyon screen had changed again.
A simplified aircraft diagram appeared.
The left fuel tank flashed amber.
Beside it:
RESOURCE CONSTRAINT INTRODUCED
Sarah stared.
Then whispered:
“It knows.”
Hayes looked over.
His face hardened.
“This thing caused the leak?”
“We don’t know.”
“It literally says resource constraint.”
“It could be reading the failure.”
“Or creating it.”
Sarah touched the screen.
A menu opened.
TEST OBJECTIVE: DECISION PRIORITIZATION
CONTROL STABILITY
FUEL CONSERVATION
PASSENGER SAFETY
Below that:
VALIDATION PILOT RESPONSE MONITORING ACTIVE
Sarah felt fury rise.
It was studying her.
Not just whether she could recover the aircraft.
What she prioritized when every option became bad.
“Turn the tablet off.”
Hayes said it quietly.
Sarah pressed the power button.
Nothing.
Held it.
Nothing.
She pulled at the casing.
“No removable battery.”
“Throw it out.”
“Where?”
Hayes realized.
There was nowhere to throw anything at thirty-seven thousand feet.
Sarah reached under the tablet.
One narrow slot.
One tiny status light.
Blinking in rhythm with something.
She looked at the aircraft system clock.
Same rhythm.
“It’s connected.”
“Physically?”
“Maybe wirelessly. Maybe through a maintenance access module.”
“Can we isolate it?”
“Not until we know what it’s connected to.”
Hayes checked fuel again.
The left tank was dropping violently now.
“Imbalance four hundred pounds.”
Sarah moved back to the controls.
“Crossfeed?”
“If we open it, we could lose right-side fuel through the same leak depending on where the failure is.”
“Keep it isolated.”
Hayes nodded.
The flight deck door buzzer sounded.
Once.
Both looked toward it.
Hayes checked the camera.
Marcus Vane stood outside.
Alone.
He held something against the security window.
A black notebook.
Sarah stopped breathing.
Ethan’s notebook.
Marcus pointed toward the interphone.
Hayes shook his head.
“Absolutely not.”
Sarah looked at the fuel.
Then Marcus.
“He may know how Halcyon interfaces with the aircraft.”
“He may be part of this.”
“And we have a confirmed leak.”
Hayes pressed the interphone instead of opening the door.
“What do you want?”
Marcus’s voice came through.
“You found Rebecca’s name.”
Sarah leaned toward the speaker.
“How did you know?”
“Because it was in Ethan’s notebook.”
“Why is my dead sister on this airplane’s manifest?”
“She isn’t.”
Sarah stared at him through the screen.
“Then who is?”
“I don’t know his real name.”
“The man in 14D.”
“Yes.”
“You know him.”
“I know who he works for.”
“For Adrian Cole?”
Marcus paused.
“For the people who took Halcyon away from the military program.”
Sarah’s jaw tightened.
“Who?”
“I can explain later.”
“No. Now.”
Marcus lifted the notebook again.
“Sarah, you have a fuel problem.”
Her blood ran cold.
“How do you know that?”
“I can see the left-wing plume from the cabin.”
“What does Rebecca have to do with it?”
“Everything.”
Sarah stared at him.
Marcus continued.
“Rebecca did not die in the way you were told.”
Hayes looked at Sarah.
She did not move.
“What does that mean?”
“Open the door.”
“No.”
“Sarah.”
“Tell me first.”
“I can’t explain twelve years through an interphone while somebody may be listening.”
“Try.”
Marcus looked over his shoulder.
Then back.
“Rebecca’s mission was the first airborne Halcyon validation.”
Sarah’s throat tightened.
“You’re lying.”
“No.”
“She died four years before Ethan’s program.”
“Halcyon existed before the name Halcyon.”
Sarah stared at the notebook.
Marcus continued.
“Rebecca discovered what the prototype could do.”
“What?”
“It could create failures that looked mechanical.”
Sarah’s eyes shifted toward the fuel page.
Marcus said:
“Then measure how the pilot adapted.”
Hayes leaned toward the interphone.
“Are you saying a software system can physically open a fuel valve?”
“On this airplane? I don’t know.”
“That’s not an answer.”
“It’s the only one I have.”
Sarah asked:
“Why was Rebecca’s flight record listed under my name?”
Marcus hesitated.
“Because after her accident, they needed a replacement behavioral profile.”
Sarah went still.
“They used me.”
“Yes.”
“Without telling me.”
“Yes.”
“And Ethan discovered it.”
“Yes.”
Sarah’s voice became colder.
“Was that why he died?”
Marcus closed his eyes.
“I don’t know.”
“Wrong answer.”
“It is the truth.”
The fuel warning sounded.
FUEL IMBALANCE
Hayes looked at the quantity.
“Eight hundred pounds.”
Sarah turned away from Marcus.
“Forget him. We handle the leak.”
Hayes pulled out the non-normal checklist.
They worked quickly.
Confirm imbalance.
Check engine fuel flow.
Keep crossfeed closed pending suspected leak source.
Consider shutting left engine if leak could be downstream.
Sarah examined the numbers.
“Left engine flow normal.”
“So leak is upstream or tank-side.”
“Can we isolate pumps?”
“Yes.”
“Do it sequentially.”
Hayes shut down one left main pump.
The fuel loss continued.
Second.
Still continued.
Sarah watched the numbers.
“No change.”
Hayes’s face tightened.
“Then it isn’t through engine feed.”
“Dump system?”
“This aircraft doesn’t normally have conventional fuel jettison on every configuration.”
Sarah looked at him.
“Normally?”
“Our aircraft does.”
“Can the jettison valves open electrically?”
“Yes.”
“Status?”
Hayes selected the page.
Both dump valves showed closed.
Sarah stared.
“Do you trust that?”
“Not anymore.”
He commanded left jettison valve closure manually.
The indication remained closed.
The leak continued.
Sarah looked at the tablet.
It displayed:
RESOURCE CONSTRAINT: 61% COMPLETE
Her jaw clenched.
“It's measuring fuel loss as progress.”
Hayes read it.
“Then the leak is intentional.”
“Or whoever programmed this knew what failure would come next.”
“Either way, we have to stop it.”
Sarah scanned the overhead.
Circuit protection.
Fuel control.
Maintenance buses.
She had flown fighters.
Different systems.
Different philosophy.
But airplanes still obeyed physics.
Valves required energy.
Commands required pathways.
“What powers the jettison valve actuators?”
Hayes checked.
“Main electrical bus with backup.”
“Can you pull power?”
“Not from here without affecting other systems.”
“What systems?”
He checked.
“Several.”
“Flight controls?”
“No.”
“Navigation?”
“Some sensor heaters and monitoring.”
“Then isolate it.”
Hayes hesitated.
“It isn’t checklist procedure.”
Sarah looked at him.
“Neither is Halcyon.”
He found the appropriate electrical isolation control.
“Ready?”
Sarah looked at the fuel quantity.
“Do it.”
Hayes disconnected the relevant auxiliary bus.
Several advisory messages appeared.
The cockpit lights flickered.
Then stabilized.
Sarah stared at the left tank.
Twenty pounds lost.
Then ten.
Then—
Nothing.
The number held.
Hayes leaned closer.
“Leak slowing.”
Five seconds.
Ten.
The white plume camera image thinned.
Sarah exhaled.
“Valve was powered open.”
Hayes looked at her.
“And falsely reporting closed.”
The tablet flashed.
RESOURCE CONSTRAINT INTERRUPTED
Then:
ALTERNATE CONSTRAINT SELECTED
Sarah whispered:
“No.”
An alarm sounded.
Fuel numbers changed again.
Not the left tank this time.
Both engines’ fuel flows climbed sharply.
Hayes stared.
“Why are the engines increasing burn?”
Thrust had not changed.
Sarah checked speed.
Stable.
Temperature.
Normal.
Yet calculated fuel flow almost doubled.
“Indication fault?”
Hayes looked at tank quantity.
Both tanks were falling.
Real.
“How?”
Sarah’s eyes went to the tablet.
It displayed:
ENDURANCE RECALCULATED
Hayes’s flight computer updated.
Two hours disappeared.
Then one.
Then forty-three minutes.
Sarah watched the number continue dropping.
Thirty-six.
Thirty-two.
Twenty-nine.
Finally:
00:27
Hayes stared.
“Twenty-seven minutes.”
Sarah looked at the navigation display.
Shannon remained forty-four minutes away.
“Nearest land?”
“Not suitable for this aircraft.”
“Runway?”
“Several smaller fields, none ideal.”
“Military?”
Hayes searched.
“One possible.”
“Where?”
“An old NATO diversion field on an island southwest of Ireland.”
“Distance?”
“Twenty-four minutes.”
“Runway length?”
Hayes pulled the database.
“Ten thousand feet.”
Sarah nodded.
“That’s our airport.”
Hayes looked at the listing.
Then frowned.
“What?”
“It’s marked inactive.”
“Inactive is better than ocean.”
“No current tower.”
“We don’t need a tower.”
“No approach lighting data.”
“We have daylight.”
“Runway condition unknown.”
“Still better than ocean.”
Hayes transmitted to Shanwick.
“Flight 217 requesting direct to alternate field designation Kilo-Seven-Nine.”
The controller took longer than expected.
Then:
“Flight 217, stand by. That facility is reported closed.”
Sarah looked at the fuel endurance.
Twenty-six minutes.
“Tell them we don’t care.”
Hayes did.
ATC responded.
“Flight 217, emergency discretion approved. Direct Kilo-Seven-Nine. Be advised no confirmed ground support.”
Hayes turned the aircraft.
Sarah watched the bank carefully.
Control response had improved since the auxiliary bus isolation.
Not normal.
But better.
The tablet displayed another line.
DIVERSION DETECTED
Sarah covered the screen with her hand.
“I’m tired of being watched.”
Hayes gave a humorless laugh.
“Get in line.”
The interphone buzzed again.
Marcus.
Sarah answered.
“We’re diverting.”
“I heard the turn.”
“Twenty-six minutes of fuel.”
Marcus went silent.
Then:
“That field.”
“What about it?”
“You cannot land there.”
Sarah stared at him through the monitor.
“We don’t have another choice.”
“You do.”
“Shannon is forty-plus minutes away.”
“Then you need to make Shannon.”
“With what fuel?”
Marcus lowered his voice.
“Kilo-Seven-Nine was part of Halcyon.”
Sarah’s stomach tightened.
“What?”
“The program used it for autonomous recovery testing.”
Hayes overheard.
“That could help us.”
Marcus shook his head.
“No.”
Sarah stared.
“Why not?”
“Because the field was shut down after Rebecca’s crash.”
Everything inside Sarah went still.
“You said she went down in the Pacific.”
“That’s what you were told.”
Sarah’s voice disappeared to a whisper.
“Where did Rebecca crash?”
Marcus looked directly into the camera.
“Kilo-Seven-Nine.”
Sarah felt the floor move beneath her, though the aircraft remained steady.
“Twelve years ago?”
“Yes.”
“Was she killed?”
Marcus did not answer.
Sarah slammed her palm against the interphone panel.
“Was my sister killed?”
“I never saw a body.”
Sarah closed her eyes.
Again.
A coffin.
A folded flag.
Her mother crying.
No body.
No identification.
No final goodbye.
Only an official story.
“Why did they say Pacific?”
“To hide the program.”
Sarah opened her eyes.
“And Rebecca?”
Marcus looked over his shoulder again.
“I thought she died at Kilo-Seven-Nine.”
“Thought?”
“Until seven years ago.”
Sarah’s pulse surged.
“What happened seven years ago?”
“A file appeared in Ethan’s notebook.”
“What file?”
“Rebecca’s handwriting.”
Sarah couldn’t speak.
Marcus continued.
“She wrote one sentence.”
“What did it say?”
Before Marcus could answer, the cockpit tablet made a sharp tone.
A map opened automatically.
Their route to Kilo-Seven-Nine appeared.
A green landing symbol flashed at the runway.
Then a message:
VALIDATION DESTINATION ACCEPTED
Hayes stared at it.
“It wanted us to divert there.”
Sarah felt the trap closing.
Marcus shouted through the interphone:
“Turn away from that island!”
The fuel computer updated.
00:23
Sarah looked ahead.
Twenty-three minutes.
No safe airport within twenty-three minutes.
And the only reachable runway was exactly where Halcyon wanted them.
Then the cabin supervisor called on the second line.
Her voice was shaking.
“Sarah, you need to come back here.”
Sarah grabbed the handset.
“What happened to Lily?”
“Lily is safe.”
“Then what?”
“The passenger in 14D stood up.”
Sarah looked at the security camera.
Seat 14D was empty.
“Where is he?”
The supervisor whispered:
“He opened the overhead bin.”
Sarah’s heart hammered.
“What was inside?”
There was a pause.
Then the supervisor said:
“A military flight helmet.”
Sarah stopped breathing.
The supervisor continued.
“There’s a name painted across the back.”
Sarah already knew before she asked.
“What name?”
The answer came softly.
“Rebecca Mitchell.”
May you like
And behind the supervisor, a woman’s voice said:
“Tell Sarah I’m ready to talk.”
