C345 Achieving Flight Permit

For a few days, the pilot plan was set up in full swing, and the two planes were always sliding, taking off, getting close, landing and so on, and so on, and so on and so forth, and so on, and so on and so forth, and so forth, and so on and so forth. After checking the engine, they refilled the fuel and took off again. In a few days, the average flight time of the two planes had reached 70 hours