Despite pre-flight checks not revealing any issues with the sensors, gyroscopes 2 and 3 gave "erroneous but similar inputs" as the plane took off. While gyroscope 1 provided correct inputs ...

The attitude indicator or artificial horizon of an airplane is one of the most important ... At the heart of this instrument is a gyroscope which consists of a spinning disc attached to a gimbal ...

It added that Lockheed Martin does not stipulate any maintenance for the pitch rate gyroscopes in F-16 aircraft. Prior to F-16 flights resuming on May 21, each F-16 in the RSAF had its gyroscopes ...