History of the Flight
On 12 December 2018, a Cessna 208B aircraft, registration PK-ASE, operated by PT. Alfa Trans Dirgantara (Alfa Aviation) was conducting an unscheduled passenger flight in Papua, Indonesia. The day's schedule included flights from Sentani International Airport (WAJJ) to Kasonaweja Airstrip, return to Sentani, then to Bime Airstrip, back to Sentani, then to Borme Airstrip, and finally to Sentani.
Before departure, the Alfa Aviation ground staff at Sentani received weather information from the charterer agent at Kasonaweja indicating good weather. The pilot was informed of this at about 0630 local time (LT). During preflight preparation, no aircraft system malfunctions were reported or recorded.
The aircraft departed Sentani at 0710 LT with an intended cruising altitude of 10,500 feet. On board were one pilot and seven passengers, with a total cargo of 241 kg. En route weather was good, and as the aircraft approached Kasonaweja, the pilot observed several clouds to the east and north of the airstrip.
The pilot flew over Kasonaweja and maintained visual contact with the runway. The pilot then joined a right downwind for runway 17 and performed an orbit to assess the runway condition and final approach path. The pilot noted slight rain on the base leg and that the runway was wet. With the runway in sight, the pilot decided to continue the landing approach.
On final approach, the runway remained visible, and the pilot aimed to touch down in the touchdown zone, indicated by several touchdown marks near the beginning of runway 17. At about 0812 LT, the aircraft touched down approximately 140 meters from the beginning of the runway. The pilot then applied reverse thrust and brakes. The aircraft continued rolling, and the pilot anticipated it would not stop before the runway end. Near the end of the runway, the pilot applied left rudder and left brake to prevent the aircraft from entering a downslope located about 14 meters from the end of runway 17.
The aircraft skidded to the left and came to a stop off the runway, about 14 meters from the end of runway 17. The right main wheel was on the downslope, causing the aircraft to tilt to the right. The propeller blades were bent backward, and the right wing sustained damage.
After the aircraft stopped, the pilot shut down the engine and evacuated the passengers using the left forward door. No injuries occurred in this occurrence.
Personnel Information
The pilot in command was 39 years old, Indonesian, and held a Commercial Pilot License issued on 17 September 2012, with a Single Engine Land type rating. The instrument rating was valid until 31 August 2019. The first-class medical certificate was issued on 5 June 2018 and valid until 31 December 2018 with no limitations. Total flying experience was 1,462 hours 49 minutes, with 1,247 hours 11 minutes on type. The last 90 days included 132 hours 29 minutes, the last 30 days 79 hours 8 minutes, the last 7 days 7 hours 30 minutes, and the last 24 hours 5 hours 19 minutes. The flight duration was approximately 1 hour.
Aircraft Information
The Cessna 208B, registration PK-ASE, serial number 20800571, was manufactured in 2015 by Cessna Aircraft Company. It had valid Certificates of Airworthiness and Registration. Total time since new was 2,354 hours and 14 minutes, with 2,947 cycles. The engine was a Pratt & Whitney Canada PT6A-114A, serial number PCE-PC2136, with a total time since new of 2,354 hours and 14 minutes.
Meteorological Information
At about 0630 LT, the ground staff at Kasonaweja reported good weather. During the flight, weather was good until the approach, when the pilot noticed slight rain and a wet runway.
Wreckage and Impact Information
The aircraft came to rest off the runway near the end of runway 17. The right main wheel was on a downslope, tilting the aircraft right. The propeller blades were bent backward, and the right wing was damaged.