Incident Summary
During the takeoff roll at visual meteorological conditions, the pilot observed that the right engine fuel flow needle had split away from the left engine fuel flow needle. Simultaneously, the aircraft began to swerve to the right. In response, the pilot aborted the takeoff. However, the aircraft continued and ran off the end of the runway before coming to a stop.
Pilot Observations
The pilot reported that the runway was heavily rutted. For approximately three-quarters of the runway length, the aircraft had to be operated on the left side to avoid the ruts. The pilot noticed the fuel flow needle split just prior to the swerve and described the takeoff as being at VMC.
Runway Conditions
The runway surface was described as heavily rutted, which necessitated using the left side of the runway for most of the takeoff roll. This condition may have affected directional control during the abort, though no causal relationship was established.
Engine Control Settings
The engine control friction was adjusted such that the throttles moved with minimal effort. The pilot stated that he typically uses little friction on the engine controls, indicating a personal preference for low resistance. No further details regarding the engine control settings were provided.