The OEI climb gradients we show for FAR Part 23 Level 4 and FAR Part 25 Transport Category aircraft are the second-segment net climb performance numbers published in the AFMs.

Most jets climb at 250 knots up to 10,000 feet due to FAA regulations. Above 10,000 feet, 280 to 300 knots with a transition to Mach .7 around 24,000 feet are average for the 737.