Backup airspeed indicator reads 20 kts on ground no wind
Flap indicator on G-900 indicates approximately 5 degrees.
Outside air temperature at 6500 reads 32 deg. Certain error.
Increased en envelope to 2 g’s which caused a buzzing sound in the aft section. Left or right turn was the same and 2 g’s is predictable. Continued envelope to .5 g’s, normal behavior Current indicated airspeed in flight 90-200 kts.
