Narrative:

After dropping off our passenger, we were attempting a takeoff on runway 3 at dca. All cockpit indications were normal up to that point. During the takeoff roll, we experienced an abrupt loss of power from the right engine. The takeoff was aborted safely and we taxied back to runway 3 for a second attempt. The second attempt produced the same power loss and resulted in a second aborted takeoff. We then taxied back to FBO and let the engines cool down for 1 hour. Upon restart, all cockpit indications were normal. I suspected vapor lock as a possible cause of the power loss and did a restart according to the checklist in the afm using the boost pumps to try to purge the system. We asked for a taxi to a location permitting a full power runup. I conducted 2 full power runups, both with and without the boost pumps. All cockpit indications were normal and the engines came up to full power, smoothly and evenly. A third takeoff was attempted on runway 33. The takeoff and climb were normal. In-flight, I noticed minor fluctuations in the right fuel flow gauge and heard a slight change in pitch from the right engine intermittently. No noticeable change in RPM was observed during the pitch changes. Upon landing at hvn, the situation was reported to the chief pilot, maintenance personnel, and dispatch.

Google
 

Original NASA ASRS Text

Title: A BE58 ACR PLT REJECTS 2 TKOFS IN A ROW WHEN THE R ENG LOSES PWR DURING THE TKOF ROLL. AFTER THE ENG IS COOLED A FULL PWR CHK AND TKOF IS SUCCESSFULLY MADE, HOWEVER, THE ENG HAS MINOR FLUCTUATIONS DURING CRUISE.

Narrative: AFTER DROPPING OFF OUR PAX, WE WERE ATTEMPTING A TKOF ON RWY 3 AT DCA. ALL COCKPIT INDICATIONS WERE NORMAL UP TO THAT POINT. DURING THE TKOF ROLL, WE EXPERIENCED AN ABRUPT LOSS OF PWR FROM THE R ENG. THE TKOF WAS ABORTED SAFELY AND WE TAXIED BACK TO RWY 3 FOR A SECOND ATTEMPT. THE SECOND ATTEMPT PRODUCED THE SAME PWR LOSS AND RESULTED IN A SECOND ABORTED TKOF. WE THEN TAXIED BACK TO FBO AND LET THE ENGS COOL DOWN FOR 1 HR. UPON RESTART, ALL COCKPIT INDICATIONS WERE NORMAL. I SUSPECTED VAPOR LOCK AS A POSSIBLE CAUSE OF THE PWR LOSS AND DID A RESTART ACCORDING TO THE CHKLIST IN THE AFM USING THE BOOST PUMPS TO TRY TO PURGE THE SYS. WE ASKED FOR A TAXI TO A LOCATION PERMITTING A FULL PWR RUNUP. I CONDUCTED 2 FULL PWR RUNUPS, BOTH WITH AND WITHOUT THE BOOST PUMPS. ALL COCKPIT INDICATIONS WERE NORMAL AND THE ENGS CAME UP TO FULL PWR, SMOOTHLY AND EVENLY. A THIRD TKOF WAS ATTEMPTED ON RWY 33. THE TKOF AND CLB WERE NORMAL. INFLT, I NOTICED MINOR FLUCTUATIONS IN THE R FUEL FLOW GAUGE AND HEARD A SLIGHT CHANGE IN PITCH FROM THE R ENG INTERMITTENTLY. NO NOTICEABLE CHANGE IN RPM WAS OBSERVED DURING THE PITCH CHANGES. UPON LNDG AT HVN, THE SIT WAS RPTED TO THE CHIEF PLT, MAINT PERSONNEL, AND DISPATCH.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.