FTW88FA023

Factual narrative

ACFT DEPARTED IN CONDITIONS OF LOW CEILING AND VISIBILITY WITH A STUDENT PLT AND PAX ON BOARD. WITNESSES AT THE ARPT ESTIMATED THE CEILING AS 150 TO 300 FT OVC WITH 1/8 TO 1/4 MILE VIS IN FOG. AFTER LIFT OFF THE ACFT ENTERED THE FOG IN A RT CLIMBING TURN AND REAPPEARED OVER THE RUNWAY HEADING IN THE OPPOSITE DIRECTION AT VERY LOW ALTITUDE. WITNESSES ON THE BEACH, ABOUT 1/2 MILE FROM THE ARPT STATED THAT THE WEATHER WAS 'POOR AND FOGGY'. THEY OBSERVED THE ACFT IMPACT THE WATER IN A RT BANK AND DISAPPEAR. INVESTIGATION REVEALED THAT THE ENG DRIVEN VACUUM PUMP WAS INOPERATIVE AT THE TIME OF T/O. THE PUMP HAD A SHEARED DRIVE SHAFT THAT EXHIBITED CONSIDERABLE WEAR. IN ADDITION, THE PUMP VANES WERE EXCESSIVELY WORN AND ONE VANE WAS FOUND JAMMED BETWEEN THE ROTOR AND THE CASE. DETAILED EXAMINATION OF THE PUMP REVEALED THAT IT HAD BEEN INOPERATIVE FOR SOME TIME PRIOR TO THE ACCIDENT. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12