Piper PA31 accident near Bontang, Indonesia, Id, August 24, 2012
On August 24, 2012 at about 5:51 am local time, a Piper PA31, registered PKIWH, was substantially damaged in an accident near Bontang, Indonesia. It was a flight of an unrecorded kind under non-U.S. private rules. 4 people were killed.
The NTSB's probable cause their words, unchanged
The NTSB has not yet published a probable cause for this accident. Investigations usually take one to two years; this page updates when the final report is released.
Source: NTSB aviation accident database, copy made October 5, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- August 24, 2012 · about 5:51 am local time
- Place
- Bontang, Indonesia, Indonesia · map
- Type
- Accident
- Injuries
- 4 people were killed.
- Weather
- not recorded
- Aircraft
- Piper PA31 350 · all PA31s on the register
- Registration
- PKIWH · no longer on the register · serial 31-785206
- Damage
- Substantial damage
- Flight
- Flight of an unrecorded kind · non-U.S. private rules
The NTSB's narrative preliminary · quoted from the NTSB record
On August 24, 2012, at 0551 universal coordinated time, a Piper PA-31-350, PK-IWH, operated by PT. Intan Angkasa Air Service under the pertinent civil regulations of Indonesia, collided with Mt. Tundung Mayang, near Bontang, Indonesia, at an elevation of 1,300 feet. The pilot and 3 passengers were fatally injured and the airplane was substantially damaged. The investigation is under the jurisdiction of the Government of Indonesia. This report is for information purposes only and contains only information released by the Government of Indonesia. Further information pertaining to this accident may be obtained from: National Transportation Safety Committee Ministry of Transportation Building 3rd Floor JI. Medan Merdeka Timur No. 5 Jakarta – Indonesia Tel: +62 21 3517606 Fax: +62 21 3517606 Email: www.dephub.go.id/knkt
The complete narrative as the NTSB published it. The NTSB's docket holds the report as a PDF and any photographs, statements and other documents from the investigation.
The factual record from the NTSB's investigation tables, in plain English
The aircraft
- Landing gear: fixed
- Engine: Lycoming TIO540 (piston); 0 hours total
- Not recorded
- Operator: Pt. Intan Angkasa Air Service
The flight
- Flight plan: not recorded
Weather at the time
- Temperature: 0°F (-18°C), dew point 0°F (-18°C)
Injuries
| Fatal | Serious | Minor | None | |
|---|---|---|---|---|
| Flight crew | 1 | |||
| Passengers | 3 |
Documents from the investigation the NTSB's docket: the evidence folder behind the report
The docket, the folder of records gathered during an investigation (maintenance records, photographs, witness statements, examinations), has not been read from the NTSB for this case yet; the list appears here once it has. Open the docket at the NTSB.
Everything on this page comes from the NTSB's public records. The narrative, probable cause and findings are the NTSB's own words; the coded tables behind the report are written out in plain English, with pilots' ages, home towns and medical details left out. The documents and photographs are the NTSB's docket, shown as the NTSB released them. This site's own text never names anyone involved. A preliminary report can change; the final report usually follows one to two years later, and the page is refreshed when it does.