Commutair flight 4821

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Commutair flight 4821
Beech 1900C, USAir Express AN0205258.jpg

A USAir Express Beechcraft 1900C , similar to the one in the accident
Accident summary
place at Gabriels , New York , United States
United StatesUnited States 
date January 3, 1992
Fatalities 2
Survivors 2
Injured 2
Aircraft
Aircraft type United StatesUnited States Beechcraft 1900C
operator United StatesUnited States CommutAir on behalf of USAir Express
United StatesUnited States
Mark United StatesUnited States N55000
Departure airport Plattsburg Clinton County Airport , New York , United States
United StatesUnited States 
Destination airport Saranac Lake-Adirondack Airport , New York , United States
United StatesUnited States 
Passengers 2
crew 2
Lists of aviation accidents

On January 3, 1992, a Beechcraft 1900C operated by CommutAir on behalf of USAir Express crashed on Commutair flight 4821 , with which a regional flight from Plattsburg Clinton County Airport to Saranac Lake-Adirondack Airport within the US state of New York was carried out. Shortly before the planned landing, the machine was flown off-road , killing two of the four people on board.

machine

The affected machine was a Beechcraft 1900C. The machine was finally assembled in 1990 and had the factory number UB-135. It was the 138th Beech 1900 machine from ongoing production. The machine was delivered new to Metro Air Northeast in December 1990 with the aircraft registration number N55000 . From April 10, 1991, the machine was in the Commutair fleet, which operated it in the livery and on behalf of USAir Express . The twin-engine regional airliner was equipped with two Pratt & Whitney Canada PT6A-65B turboprop engines . By the time of the accident, the machine had completed a total of 1675 operating hours.

Inmates

On Commutair flight 4821, a Commutair domestic scheduled flight within New York State, only two passengers were on board that day. There was also a two-person crew on board, consisting of a flight captain and a first officer. No flight attendants were provided on the regional flight.

Course of the flight and course of the accident

The aircraft was approached using an instrument landing system (ILS). The pilots had received clearance to land on runway 23 at Saranac Lake-Adirondac Airport. The machine was flown on the approach to the destination airport about 6.2 km from the runway at an altitude of about 2280 feet (about 690 meters) above sea level on a hill on Blue Hill . The elevation of the glide path at this point would have been 2,900 feet (approximately 880 meters). One of the two pilots and one of the two passengers on the scheduled flight were killed.

root cause

The cause of the accident was attributed to the master's failure to initiate a stabilized approach, as well as his inadequate cross-checking of the instruments and the execution of a descent below the safety altitude during the final correction of the approach. The first officer was charged with failing to monitor the approach. The weather conditions and possible static precipitation disturbances were cited as contributing factors in connection with the accident. The NTSB believed that the glide path indicator may have shown unreliable readings due to this static precipitation.

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