Accidents
Business Aircraft Accident Reports: April 2024
Preliminary and final accident reports, April 2024
rural runway

Preliminary Reports

Hypoxia Suspected in Loss of Fire Spotter

Twin Commander 695A, Nov. 4, 2023, Cloncurry, Queensland, Australia

Earlier anomalies in flight track and pilot communications suggest hypoxia as a possible cause of the crash that claimed the lives of the pilot and two fire spotters. The IFR flight to perform aerial photography of fire zones north of Mount Isa climbed to FL280 after departure from Toowoomba. Twenty minutes later the pilot requested descent to FL150; after six minutes, the pilot requested and was cleared to climb back to FL280.

The pilot acknowledged a frequency change at 12:45:51 but failed to respond to 15 separate transmissions over almost an hour. He did check in on the correct frequency at 13:41 but didn’t respond to subsequent transmissions.