Prinair Flight 191
Encyclopedia
Prinair Flight 191 was a Prinair
(Puerto Rico International Airlines) flight from Luis Muñoz Marín International Airport
in San Juan, Puerto Rico
, to Mercedita Airport
in Ponce, Puerto Rico
. At approximately 11:15pm on 24 June 1972, the aircraft crashed while attempting to land at Mercedita Airport. Five people died in the accident.
aircraft, registration number N554PR. The aircraft was almost fully loaded, with eighteen passengers and a crew of two on board.
. The pilot over-rotated the aircraft and caused it to stall
at a low level and crash; three passengers and the two flight crew members died, the other fifteen passengers were injured, seven seriously. Heavy fog was also a contributing factor in this accident.
(NTSB) investigation concluded that the probable cause was the "presence of an unauthorized vehicle on the runway which caused the pilot to attempt a go-around after touchdown to avoid a collision. The maneuver resulted in an overrotation of the aircraft at too low an airspeed to sustain flight". This was based on eyewitness accounts of a set of lights visible on the runway as Flight 191 approached, and other eyewitness accounts of a vehicle owned by the Puerto Rico Ports Authority being parked shortly after the accident and the driver acting in a suspicious manner.
Three years after the accident the NTSB was compelled to re-open the investigation into the crash, after submissions were received that the person who was suspected of driving the "unauthorized vehicle" had actually left the airport about fifteen minutes before the aircraft crashed. The second investigation concluded that there was no airport vehicle on the runway, and that the reason for the go-around of the aircraft was unknown; a new report was issued, explaining the evidence as to the location of the airport vehicle and amending the Probable Cause to remove reference to a vehicle being on the runway.
Prinair
Prinair was a Puerto Rican airline. It was Puerto Rico's domestic and international flag carrier airline for almost two decades.- History :Services began in 1966, under the name Aerolíneas de Ponce , with Aero Commanders...
(Puerto Rico International Airlines) flight from Luis Muñoz Marín International Airport
Luis Muñoz Marín International Airport
Luis Muñoz Marín International Airport is a joint civil-military public airport located in Carolina, Puerto Rico, three miles southeast of San Juan. Over 4 million passengers board a plane at the airport per year according to FAA reports . It is owned and managed by the Puerto Rico Ports...
in San Juan, Puerto Rico
San Juan, Puerto Rico
San Juan , officially Municipio de la Ciudad Capital San Juan Bautista , is the capital and most populous municipality in Puerto Rico, an unincorporated territory of the United States. As of the 2010 census, it had a population of 395,326 making it the 46th-largest city under the jurisdiction of...
, to Mercedita Airport
Mercedita Airport
Mercedita Airport is a commercial airport located three miles east of the central business district of Ponce, Puerto Rico. The airport covers and has one runway. Passenger movement at the airport in FY 2008 was 278,911, an astounding 1,228% increase over fiscal year 2003 and the highest of all...
in Ponce, Puerto Rico
Ponce, Puerto Rico
Ponce is both a city and a municipality in the southern part of Puerto Rico. The city is the seat of the municipal government.The city of Ponce, the fourth most populated in Puerto Rico, and the most populated outside of the San Juan metropolitan area, is named for Juan Ponce de León y Loayza, the...
. At approximately 11:15pm on 24 June 1972, the aircraft crashed while attempting to land at Mercedita Airport. Five people died in the accident.
Aircraft and crew
The flight was operated by a de Havilland DH.114 Heron 2BDe Havilland Heron
The de Havilland DH.114 Heron was a small, propeller-driven British airliner that first flew on 10 May 1950. It was a development of the twin-engine de Havilland Dove, with a stretched fuselage and two more engines. It was designed as a rugged, conventional low-wing monoplane with tricycle...
aircraft, registration number N554PR. The aircraft was almost fully loaded, with eighteen passengers and a crew of two on board.
Flight and accident
The flight was uneventful up to the moment of landing. As the flight was late at night, the control tower at Mercedita Airport was closed, therefore the flight crew was responsible for the landing clearance. Just after touching down on the runway at Mercedita Airport the flight crew made a decision to go aroundGo-around
A go-around is an aborted landing of an aircraft that is on final approach.- Origin of the term :The term arises from the traditional use of traffic patterns at airfields. A landing aircraft will first join the circuit pattern and prepare for landing in an orderly fashion...
. The pilot over-rotated the aircraft and caused it to stall
Stall (flight)
In fluid dynamics, a stall is a reduction in the lift coefficient generated by a foil as angle of attack increases. This occurs when the critical angle of attack of the foil is exceeded...
at a low level and crash; three passengers and the two flight crew members died, the other fifteen passengers were injured, seven seriously. Heavy fog was also a contributing factor in this accident.
Investigation
The National Transportation Safety BoardNational Transportation Safety Board
The National Transportation Safety Board is an independent U.S. government investigative agency responsible for civil transportation accident investigation. In this role, the NTSB investigates and reports on aviation accidents and incidents, certain types of highway crashes, ship and marine...
(NTSB) investigation concluded that the probable cause was the "presence of an unauthorized vehicle on the runway which caused the pilot to attempt a go-around after touchdown to avoid a collision. The maneuver resulted in an overrotation of the aircraft at too low an airspeed to sustain flight". This was based on eyewitness accounts of a set of lights visible on the runway as Flight 191 approached, and other eyewitness accounts of a vehicle owned by the Puerto Rico Ports Authority being parked shortly after the accident and the driver acting in a suspicious manner.
Three years after the accident the NTSB was compelled to re-open the investigation into the crash, after submissions were received that the person who was suspected of driving the "unauthorized vehicle" had actually left the airport about fifteen minutes before the aircraft crashed. The second investigation concluded that there was no airport vehicle on the runway, and that the reason for the go-around of the aircraft was unknown; a new report was issued, explaining the evidence as to the location of the airport vehicle and amending the Probable Cause to remove reference to a vehicle being on the runway.