World Champion Lewis Hamilton set the quickest time during an opening practice session in Hungary which was disrupted by two red flags.
The first came when Force India driver Sergio Pérez suffered a frightening airborne accident in the VJM08.
Pérez ran slightly wide onto the exit kerb at Turn 11 and his right rear suspension appeared to fail, pitching him into the barriers on the inside.
As Pérez struck the barriers, his right front wheel buckled underneath the chassis and dug in, causing the Force India to flip over.
Pérez was able to clamber unscathed from his wreckage and the session was stopped while the wreckage was removed.
The session was restarted but halted again with five minutes remaining when Kimi Räikkönen’s front wing collapsed underneath his car at the exit of Turn 12, shattering as he ran over it.
The session was red flagged in order for marshals to clear debris from Raikkonen's destroyed front wing.
Hamilton’s time of 1:25.141 ended up a tenth of a second quicker than Mercedes team-mate Nico Rosberg, with Räikkönen in third.
Daniel Ricciardo and Daniil Kvyat were fourth and fifth for Red Bull, ahead of Ferrari driver Sebastian Vettel, who suffered a loss of power.
Carlos Sainz Jr. was seventh quickest for Toro Rosso, with Pérez, Valtteri Bottas and Max Verstappen rounding out the top 10.
Fernando Alonso and Jenson Button were 11th and 12th, while Nico Hülkenberg was 13th after being kept in the garage following Pérez’s accident.
Felipe Massa was 14th fastest, ahead of Sauber pair Felipe Nasr and Marcus Ericsson.
Pastor Maldonado was 17th, with Will Stevens 18th and Manor Marussia reserve driver Fabio Leimer having an error-free run to 19th on his practice debut.
Jolyon Palmer completed only a handful of laps after Lotus’ tyres were delivered late and was not able to post a time.