As of June 2018, how many accidents has the Costa Rican airline SANSA had?

SANSA Airlines (Servicios Aéreos Nacionales S.A.) is an airline based in San José, Costa Rica. It operates scheduled passenger services as part of the TACA Airlines regional airline system, and is a subsidiary of Avianca Costa Rica. Its hub is Juan Santamaría International Airport.

The SANSA Airline has had four accident were the plane has crashed.

On April 19, 1984, A DC3 (TI-SAA) charter flight coming from San Andres (Colombia) crashed on "Cerro Santa Rosa" (northwest face of the Irazu Volcano), killing all on board.

On January 16, 1990, SANSA Flight 32 crashed into the Cerro Cedral, a mountain in Costa Rica, after takeoff from Juan Santamaría International Airport in San José. All 20 passengers and 3 crew on board died in the crash.

On August 26, 2000, SANSA Flight 1644 crashed into the Arenal Volcano, an active volcano in Costa Rica. The aircraft collided with the active 5380 feet (1650 m) high Arenal volcano, at around 656 feet (200 m) below the crater. All 8 passengers and 2 crew on board died in the crash.

On November 28, 2001, SANSA Flight 1625 crashed into the Cerro Chontal, a mountain in Costa Rica. The aircraft crashed approx. four minutes before it was expected to land into a wooded hillside of the Cerro Chontal. The aircraft appeared to be off the usual approach track for Quepos. Both crew members and 1 passenger died; 5 passengers survived the crash and were rescued the next day.