Cessna 207 N7379U
7 August 2018 · Iliamna, Alaska, United States · No injuries
Summary
On 7 August 2018 at about 20:15 local time, a Cessna 207 registered N7379U, operated by Iliamna Air Taxi Inc, was involved in an accident near Iliamna, Alaska, United States. One person was on board and nobody was injured. The aircraft was substantially damaged. The NTSB has published a probable cause for this accident; it is quoted in full below.
The record
- Date
- at 20:15
- Classification
- Accident
- Location
- Iliamna, Alaska, United States
- Nearest airport
- Iliamna Airport (PAIL)
- Coordinates
- 59.7458, -154.9175
- Aircraft
- Cessna 207
- Registration
- N7379U
- Category
- Airplane
- Year built
- 1978
- Engines
- 1
- Operator
- Iliamna Air Taxi Inc
- Operating rule
- Part 135: Air Taxi & Commuter
- Phase of flight
- Not recorded
- Route
- Unknown → Kokhanok
- Aircraft damage
- Substantial
- Weather
- VMC
- Light
- Day
- NTSB number
- ANC18LA064
People
Nobody was injured.
| On board | Died | Serious | Minor | Uninjured |
|---|---|---|---|---|
| 1 | 0 | 0 | 0 | 1 |
Probable cause
A total loss of engine power due to detonation/preignition damage of the No. 2 cylinder and piston for reasons that could not be determined.
Quoted verbatim from the NTSB record. This site does not paraphrase or interpret it.
Read the full NTSB narrative
The pilot reported that shortly after takeoff, as he began to configure the airplane for cruise flight, the engine began to run rough and lose power, and he elected to immediately return to the airport. The engine subsequently lost total power and the pilot performed a forced landing on tundra-covered terrain, during which the airplane sustained substantial damage. Examination revealed that the No. 2 piston was eroded on the bottom side, and a hole was burned through. The No. 2 piston and cylinder head were mechanically damaged by loose piston ring debris. Closer examination of the No. 2 cylinder head revealed re-solidified molten metal around the bottom Heli-Coil tang notch. All damage discovered was consistent with a pre-ignition/detonation event; however, the cause of the pre-ignition and/or detonation could not be determined based on the available information.
Quoted verbatim from the NTSB record.
Other Cessna 207 accidents
| Date | Aircraft | Location | Operator | Outcome | Died |
|---|---|---|---|---|---|
| 11 Oct 2018 | Cessna 207 | Anchorage, Alaska, United States | - | No injuries | - |
| 25 Feb 2018 | Cessna 207 | Newtok, Alaska, United States | Paklook Air | No injuries | - |
| 27 Aug 2017 | Cessna 207 | Recanati, Italy | - | No injuries | - |
| 26 Jun 2017 | Cessna 207 | Vinalhaven, Maine, United States | Waters Aero Marine Inc | Minor injuries | - |
| 3 Jul 2017 | Cessna 207 | Hope, Alaska, United States | Alaska Air Taxi LLC | No injuries | - |
| 6 Jun 2019 | Cessna 207 | Birtingarholt, Iceland | - | No injuries | - |
Other accidents in this area
| Date | Aircraft | Location | Operator | Outcome | Died |
|---|---|---|---|---|---|
| 22 Aug 2018 | Cessna A185F | Kaktovik, Alaska, United States | - | No injuries | - |
| 30 May 2018 | Cessna 180 | Kake, Alaska, United States | - | No injuries | - |
| 16 Jul 2018 | Piper PA18S | Palmer, Alaska, United States | - | No injuries | - |
| 20 Aug 2018 | Piper PA18 | McGrath, Alaska, United States | - | No injuries | - |
| 16 Jul 2018 | Curtiss-Wright C46 | Manley Hot Springs, Alaska, United States | Everts Air Fuel Inc | Minor injuries | - |
| 24 Sep 2018 | De Havilland DHC 2 MK. I(L20A) | Kukaklek Lake, Alaska, United States | T-Corp | Minor injuries | - |