Jessica is given a hold short at runway 15 left, and she stops on the runway, a clear violation of instructions - then when she gets clearance to take off, she taxis a second time onto the runway.
The instruments are fluctuating, including the turn and bank indicator. The instruments are all vacuum driven except the turn and bank indicator. It is the fail-safe instrument and is driven by an electric gyro as a no-fail safety feature. Pilots must pass a flight test demonstrating ability to operate the aircraft by reference only to the airspeed (which is not a gyro instrument) and the turn and bank indicator. All commercial pilots must demonstrate proficiency at this during an FAA examiner's check ride.
When Sara is cleared to climb to 10500 to avoid weather, the camera cuts to a shot of the altimeter. Based on the shot, the altimeter starts off showing them at 6000ft, which is about right. But the altimeter's hand is making an entire sweep about every two seconds, which indicates a rate of climb of around 30000 feet per minute. It is physically impossible for a twin engine turboprop to climb at that rate.
When Sara tunes the radio to declare a mayday, she tunes to 127.6mhz. The international emergency frequency is 121.5mhz.
When the plane first takes off, Bruce is playing his guitar, holding it upside down.
The tower controller clears YZX for take-off on runway 15L, but when she taxi's onto the runway it clearly shows 26L.