Barklage REVOLUTION MINI 500 N611AB
19 September 1998 · Cahokia, Illinois, United States · Fatal
Summary
On 19 September 1998 at about 18:30 local time, a Barklage REVOLUTION MINI 500 registered N611AB was involved in an accident near Cahokia, Illinois, United States. One person was on board and one died. The aircraft was destroyed. The NTSB has published a probable cause for this accident; it is quoted in full below.
The record
- Date
- at 18:30
- Classification
- Accident
- Location
- Cahokia, Illinois, United States
- Nearest airport
- St. Louis Downtown Parks (CPS)
- Coordinates
- 38.5700, -90.1692
- Aircraft
- Barklage REVOLUTION MINI 500
- Registration
- N611AB
- Category
- Helicopter
- Engines
- 1
- Operator
- Not recorded
- Operating rule
- Part 91: General Aviation
- Purpose of flight
- Personal
- Phase of flight
- Not recorded
- Route
- Unknown → St. Charles
- Aircraft damage
- Destroyed
- Weather
- VMC
- Light
- Day
- NTSB number
- CHI98FA353
People
1 person died.
| On board | Died | Serious | Minor | Uninjured |
|---|---|---|---|---|
| 1 | 1 | 0 | 0 | 0 |
Probable cause
A loss of engine power due to cold seizure of the power-takeoff cylinder. A factor contributing to the accident was the power lines.
Quoted verbatim from the NTSB record. This site does not paraphrase or interpret it.
Read the full NTSB narrative
A witness watched the helicopter as it climbed out after takeoff. The witness said that the helicopter was higher than the telephone lines which ran northeast of the airport. 'He was level and climbing, going away from me when all of a sudden, the sound (engine sound) went quiet, followed by a pop. It was not a loud pop.' The helicopter began a shallow descent. At about 30 to 40 feet above the field, the helicopter 'leveled out,' but 'kept coming down.' The witness said he saw the helicopter 'hit' and then 'cartwheel.' Examination of the helicopter's engine revealed scoring marks on the power-takeoff cylinder (front cylinder) piston, and impact marks in the head. Small metallic particles were embedded in the piston head. The power-takeoff cylinder wall showed scuff marks, and the cylinder head showed impact marks. The two power-takeoff spark plugs' showed no gap at the electrodes, and impact marks. No other anomalies were revealed.
Quoted verbatim from the NTSB record.
Other accidents in this area
| Date | Aircraft | Location | Operator | Outcome | Died |
|---|---|---|---|---|---|
| 23 Nov 1998 | Brantly B2B | Salem, Illinois, United States | - | No injuries | - |
| 14 May 1998 | Enstrom F28 | West Chicago, Illinois, United States | Oliver's Helicopters | No injuries | - |
| 25 May 1998 | Cessna 310L | Wheeling, Illinois, United States | - | No injuries | - |
| 6 Jun 1998 | Grumman G164 | Somonauk, Illinois, United States | - | No injuries | - |
| 27 Nov 1998 | Piper PA-28-140 | East St. Louis, Illinois, United States | - | No injuries | - |
| 21 Jun 1998 | Cessna 172P | Grays Lake, Illinois, United States | - | Minor injuries | - |