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Crash of a Cessna 421C Golden Eagle III in Eagle Pass

Date & Time: Oct 18, 1998 at 0600 LT
Operator:
Registration:
N19MH
Flight Phase:
Flight Type:
Survivors:
Yes
Schedule:
Eagle Pass - San Antonio
MSN:
421C-1008
YOM:
1980
Crew on board:
1
Crew fatalities:
Pax on board:
4
Pax fatalities:
Other fatalities:
Total fatalities:
0
Captain / Total flying hours:
2095
Captain / Total hours on type:
120.00
Aircraft flight hours:
4071
Circumstances:
During takeoff climb, the twin-engine airplane encountered a strong downdraft and impacted trees and terrain. The pilot reported that while taxiing to the runway, he scanned the sky with the monochrome weather radar, which was set at the 40-mile range. 'No weather was shown behind the runway and a cell was shown 15 miles from the runway.' The takeoff roll was 'uneventful,' and the airplane was rotated at 95 knots. Climb out was accomplished at 110 knots, the engines were at maximum power, the propellers at maximum RPM, and the manifold pressure was indicating maximum. A 10-degree turn towards the Cotulla VOR was being made when at 1,500 feet msl, a sharp descent was felt with the VSI indicating an 800 ft/min rate of descent. The wings were leveled and the airspeed was slowed to 85 knots. 'The rate of descent slowed to 400 ft/min and then finally to 300 ft/min until impact...' The airplane was destroyed by fire that erupted on impact. A review of doppler weather radar images showed thunderstorms in the vicinity of the airport.
Probable cause:
A downdraft, which exceeded the aircraft's climb performance. A factor was the thunderstorms in the vicinity of the airport.
Final Report:

Crash of a Cessna 421C Golden Eagle III in San Antonio: 2 killed

Date & Time: Feb 10, 1994 at 0713 LT
Operator:
Registration:
N741CA
Flight Type:
Survivors:
Yes
Schedule:
San Antonio - Eagle Pass
MSN:
421C-0899
YOM:
1980
Crew on board:
1
Crew fatalities:
Pax on board:
2
Pax fatalities:
Other fatalities:
Total fatalities:
2
Captain / Total flying hours:
5100
Captain / Total hours on type:
400.00
Aircraft flight hours:
2916
Circumstances:
Shortly after takeoff, the pilot reported he had 'a problem' and needed to return immediately. Witnesses observed dark black smoke coming from both engines. The airplane collided with a tree 1/2-mile northeast of the runway threshold. Analysis of fuel samples revealed the presence of approximately 50% jet fuel. The right propeller was found feathered and engine disassembly revealed a hole burned in the right engine number 5 piston. Left engine disassembly revealed piston edges eroded down to the first compression ring. Fuel filler restrictors had been installed in the airplane's fuel tanks, but the fuel truck did not have the restrictive mating nozzle. The fuel truck was owned by the fuel vender and leased to the FBO.
Probable cause:
Improper servicing of the airplane with jet fuel, which resulted in preignition and/or detonation and subsequent failure of pistons in both engines. A factor related to the accident was: the lack of a restrictive mating nozzle on the refueling truck.
Final Report: