Chapter 11 — Light Streaks Off The Runway

Two days is not a period of time. It's a to-do list, a number of people to sign, and a weather window that can close at any moment.

Nghi divides the job board into four columns. Measure geometry in the yard. Check the power and switch the source. Review eight years of records. Record activities and oral reports not yet entered into the system.

“Which column are you in?” Uyen asked.

“The fourth column with me, then make the measurement matrix yourself.”

Uyen looked at the list. “Doing it yourself means you didn't see it first?”

"You look at the method, don't change the results."

“What if I measure wrong?”

“Where did I write it wrong?”

Uyen inhaled. "Okay."

Duy received the tower log review. Lan received the scene and water level. Kha received the apron operation report, this time not just keeping the road. Han acted as the agency's data liaison and found someone who could take photos from a high angle when there was no rain.

Sign the order to establish a verification team. He added a line: "All data keep the original, do not replace the image with an annotated version."

Nghi read and asked: "Who saved it?"

“Technical department.”

“Your name?”

Tong wrote his name.

In the morning, Uyen reconstructed the image matrix. She used a thin wire along the actual edge, measured from the landmark to each light, and recorded the bearing with a handheld device. The first time, the error between two measurements was nine millimeters. Nghi asked her if she had fixed the tripod yet.

“Not enough.”

"Redo."

Uyen did. The second time the error was two millimeters. She looked at Nghi, waiting for a compliment. Nghi only asked: "Do you even record the first time?"

"Have."

"Good."

“Didn't you say I did well?”

"I now know where I measured wrong. That's the good part."

Uyen laughed. “You give compliments like this, making people praise themselves.”

“Self-praise is evidenced by skill.”

Lan and two employees walked along the ditch. She measured the water level using the same stake, but changed the observation position to see if the stake was sinking. An employee asked why sensors were not used.

“There are sensors,” Lan said. “But the sensor doesn't know it's plugged into a tilted platform.”

They found a new ditch connecting to the foot of box number 17. The ditch was only as wide as a hand but carried silt from the lagoon. Lan took photos and marked them. No major landslides. It only changes little by little, enough to pull things that are designed to assume everything is stationary.

Duy in the tower opens old reports by keyword. He found three more copies. One pilot noted “the edge of light seemed to open up”; an employee reports “the west end lights are not flashing at the same time”; One copy does not have the name of the recorder, only the shift and time are recorded.

He called Nghi. “More data.”

“Send the original.”

“One copy has no signer.”

“Send it all.”

“If people ask if that copy is valuable?”

"It serves as an indication. Not a conclusion."

Duy repeated that sentence, then said: "I'm starting to hate having to classify everything."

“Categorizing helps you know what you're missing.”

“And it can also cause people to throw away things that don't fit in their umbrellas.”

Doubt. Duy hit the right spot.

Check the apron window. He found the names of the employees who reported the lights, but many had changed shifts or quit. He called each person. Some people say they don't remember. Some people say they reported it orally. Some people just asked if they could be mentioned by name.

Kha replied: "If you want, the team will clearly state the supplier. If not, we will record anonymously but do not consider it a confirmation."

A former employee named Phuc said he once saw the light shift after it rained, but his superiors told him not to write it down because "it was just a reflective background." Kha asked who said it. Phuc asked not to be named. Kha write verbatim, not forced.

At the end of the day, the group meets. The data begins to take shape: seasonal ground subsidence, misaligned junction boxes, pulled cables, more obvious geometric errors when switching sources, old reports repeating in the same area.

Nghi wrote on the board: "Is the W-3 circuit having operating problems?"

“That question is broad,” Uyen said.

“So fix it.”

Uyen holds the pen: “Can the W-3 system maintain stable edge light geometry under humid and power switching conditions?”

Duy nodded. “The Measurable Question.”

Tong stood at the door, listening. “If the answer is no?”

Nghi replied: "We must set limits on exploitation."

“What if the answer is yes but there is not enough data?”

“Not confirmed.”

Tong looked at the board. “Two days is not enough to repeat all the conditions.”

“So the report must say not enough.”

Han appeared with a document from the company. The airline can arrange for a pilot to test using simulation on ground equipment, without using passenger flights. The pilot will view the sequence of images and evaluate whether the light streak makes it difficult to distinguish the edge of the field in simulated conditions.

Nghi asked: “Is that assessment technical data or opinion?”

“It's a methodical professional opinion,” Han replied. “Does not replace measurement, but helps understand consequences.”

Please ask about the cost. Han answered specifically. He calculated on the computer, then nodded.

“Do,” he said.

In the evening, Uyen signed the matrix herself as the measurer. She looked at her name under the line "executor" and asked Nghi: "What if tomorrow they find out I wrote it wrong?"

“They will indicate which line.”

“What if they don't just tell me that I don't have enough experience?”

“I asked if they wanted to fix numbers or people.”

Uyen couldn't laugh. Nghi put his hand on the board and pointed to the method column. "Experience is not a license for others to ignore your data. But your data must also withstand inspection."

Uyen looked back at the numbers. “Then I will accept.”

As night falls, the job board still has many unchecked boxes. Outside in the yard, the water level continued to rise. In the tower, Duy listens to old radio recordings. On the apron, Kha called someone whose name was not on the personnel chart. In the archives room, Vuc looked for revision requests that had been sent without a response.

Two days does not create the truth on its own. It just forces people to stop saying they don't have time to look.

The third day started with some people having to redo what they thought was done. Uyen discovered that the two high-altitude camera photos used a four-minute time difference because the device was not synchronized. She reported it immediately, even though that meant having to contact Han to ask for the original copy and rebuild the matrix.

“I'm afraid of being asked why I didn't check from the beginning,” Uyen said.

Nghi replied: "If I hide it, people will use the wrong photo. Reporting it early is the best thing I did today."

Han sent the data copy, no blame. She only asked to write down the replacement source and reason for the change. Uyen updated the version, marking the old version as not being used for conclusions. Tong looked at the changes table and asked if he kept making changes, when would the report be completed?

Nghi said: “When readers know which versions can be used and which versions should be rejected.”

“Not when there are no more errors?”

“No dataset is naturally clean.”

The independent team from the measuring unit arrived at noon. They don't just read reports; they ask how to set landmarks, background conditions, junction box temperatures, and photo access. The person in charge is Do Khoi, does not know Vuc and is not dependent on the exploitation schedule. Khoi asked Nghi not to stand next to Uyen while presenting.

Uyen talks about photo matrices, old maps, water levels and two power cycle. Khoi asked why she eliminated a photo.

“Time lag device,” Uyen replied.

“What if you don't find out?”

“The conclusion will contain the wrong time gap.”

Khoi nodded. “Who found out?”

“You.”

“Write the name of the discoverer.”

Uyen looked at Nghi and said to herself: "It's been recorded."

Khoi took the group to the scene. Lan asked him to stand on the concrete ground before going across the ditch. He didn't consider it slow; he asked how to check the way. Lan instructed, then he followed.

At box number 17, Khoi did not open it immediately. He measured the reference landmark, measured the pile, and took photos of the water direction. When opening the box, he asked Nghi to stand at a distance so the writer could see the operation. Technique is not performance, but if only one person knows what he touched, the record will be lacking.

Khoi reads the hot connector index and asks if the device has been calibrated. Nghi gave the inspection certificate. He did not say “good”. He noted the confidence range and recommended re-measurement after the box was replaced.

Hearing the cost, Tong grimaced a bit. Han asked if he could divide the steps. Khoi said the box and circuit can be processed first, but reopening at night still requires checking the geometry and power.

Nghi asked: "What if the budget is only enough to replace the box?"

Khoi replied: "The report only confirms that the box has been replaced, not that the runway is ready."

Tong nodded, even though the answer made him lose another option.

Afternoon, Hanh? Nghi found herself trying to mistakenly call an employee in her old group, then changed it to Uyen. No one laughed. She realized names could change as roles changed; The apprentice from the first day is now the keeper of part of the file.

Uyen asked: "Who were you planning to call?"

"Not important."

“It might matter if the name decides.”

Doubt stop. She gave the name of a former technician who had changed jobs, explaining that she was tired and made a mistake. Uyen wrote in the shift transfer book, not to criticize, but to report that Nghi had adjusted the person in charge on the list.

Tong looked at that action. “You don't need to write down every time you say something wrong.”

“If the wrong statement makes you wrong, you need to.”

Khoi suggested making three separate records: current status, correction, and post-correction confirmation. Do not merge to avoid the final version erasing the previous state. Nghi agrees. Vuc sent additional old documents, which were classified in the history section and not included in the measurement results.

That night, Nghi wrote an update to the province. She clearly stated what she knew, didn't know and could do in seven days. She did not promise a reopening date; She promised the next reporting date.

Also read, add a line about the impact on staff and cold storage. Han added the trip frame status. Added vehicle limit. Spread more water level.

The update is six pages long.

No one calls it beautiful. But if a person only reads those six pages, they also know what the airport is doing, what it hasn't done, and why they can't use the green board to answer for the whole ground.