F-35 pilot spent nearly an hour troubleshooting with Lockheed before ejecting

The pilot ejected after approximately 50 minutes on the call with engineers and sustained only minor injuries. The F-35, valued at close to $100 million, was destroyed in the crash.

An investigation found that hydraulic fluid servicing one of the landing-gear circuits contained about 30% water instead of none. In Alaska’s cold conditions, this led to ice blockages in critical systems. The frozen fluid caused all three sensors to incorrectly report that the jet was on the ground, prompting its flight-control computer to switch from flight mode to ground mode and making it unflyable.

Despite extensive troubleshooting efforts by Lockheed Martin engineers during the call, they were unable to identify a probable cause while airborne. The report notes that although engineers can provide technical support remotely, their ability is limited by information relayed by pilots during emergencies.

This event is among several incidents involving F-35s in recent years. In May 2024, another F-35B variant crashed but also resulted in no fatalities. Nine days after January’s crash, another F-35 departing Eielson Air Base experienced hydraulic freezing but landed safely. These issues have been linked primarily to oversight problems and improper servicing procedures related to hydraulic fluid distribution.

The F-35 program features several variants designed for different operational needs:

- The F-35A is considered the basic or primary version.

- The F-35B includes short takeoff and vertical landing (STOVL) capabilities using a lifting fan.

- The F-35C is built for carrier operations with larger wings and reinforced structures.

Operating these advanced jets involves managing complex systems and technology innovations introduced by Lockheed Martin. This complexity increases both operational challenges and maintenance demands for crews and support teams.