 Initially, flight controllers suspected it was an issue with the attitude (orientation) control system.According to flight controllers, the crew was not in any danger and ample supplies were on board the Soyuz for the modified flight profile.On 26 March, the first two maneuvers of the revised 34-orbit rendezvous plan occurred without incident, with docking scheduled for 27 March, although engineers had yet to determine the exact cause of the initial failure.