I have flown -5 garrets and -10 in 690 commander and 1000
690commander 331 -5 goes 250-260 kts betweeen 18-20 thousand feet summer and 20-22 thousand in winter burning 500 pounds a hour in cruise= 73 gallons hour and 600 pounds and hour first hour =88 gallons
hot sections every 1800 hours 5400 tbo. They can be expensive if not flown consative with a cap around 106k. my first hot was 98k including inspection and parts on both engines. most damage found in hot section inspection is from starting engines with weak batteries, so i’ve been told.
i believe you have to do a gear box inspection on second hotsection
1000 commander 331-10 goes 300kts at 28,000 feet burning 440-480 summer/winter pounds an hour in cruise=64 gallons. first hour = 600 lbs an hour =88 gallons.
i am on 5000 tbo. one hot section at 2,500 and no gear box inspection required. 30-35k average hot section for both engines. mine was 60k for both engines because i had lot of erosion on one t wheel. supposively from flying up to 32-35 thousand feet will cause that, but plane is not rvsm’d now. I know someone who’s hot sections on a -10 commander totaling 20k for both engines.
garret= push power levers foward=instant power. loud outside but don’t notice it inside. pull the power back to king air speed and you won’t even notice the noise, lol