The Emirati sat out Wednesday night's first official qualifying session after teammate Prince Abdulaziz bin Turki Al Faisal spun and crashed into the barrier during official practice earlier in the day.
While the Saudi driver was unhurt, the Dunlop Ferrari 458 Italia was too badly damaged to allow Al Qubaisi, the first UAE driver to compete at Le Mans, Abdulaziz and their Italian teammate, Andrea Bertolini, to take part in the evening qualifying session.
The damaged rear half of the car's chassis was being replaced Thursday by a new part which arrived overnight from Italy, and mechanics were working to get the Ferrari ready for tonight's two remaining two-hour qualifying sessions.
"Conditions were very difficult because it had been raining and parts of the track were drying out and others were still wet," said Al Qubaisi, who is sponsored by Emirates Aluminium and supported by Abu Dhabi Racing.
"I drove to begin with and was out for about 45 minutes, and then Abdulaziz took over and was doing well.
"Then, suddenly, the car spun, slid across the grass and hit the barrier quite hard."
"We lost two hours of practice as well as qualifying so we've lost four hours of track time, overall. Before the accident our pace was good and the car was fine, so hopefully we will have no more problems when the race starts."
When the race gets under way Saturday afternoon, the biggest concern for the Emirati will be the constant pressure from the mighty LMP prototypes that dominate the epic endurance race, and the knowledge that a split-second loss of concentration could end his challenge abruptly.
"Our maximum speed is about 300kph, but the LMP cars fly past at 350kph, and the biggest challenge is to be aware of where they are, especially during the night," Al Qubaisi said.
The team is entered in the GTE Pro class, which is for cars adapted from production models and contested by the world's top sports-car brands.
"Obviously, I would love to do well this time, maybe finish in the top 10 in our class, and then come back next year and go for a podium finish," said Al Qubaisi, also supported by Etihad Airways.
"This is as good and as tough as it gets in GT racing, and that puts a lot of pressure on you.
"It's so important not to lose concentration for a moment."
This weekend sees Al Qubaisi creating a piece of motor racing history for the second time in just over 18 months.
In January 2012 he became the first UAE driver to be part of a winning team in the Dunlop 24 Hours of Dubai, returning 12 months later to repeat the feat.
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