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| Date: | Sunday 11 September 1966 |
| Time: | 13:48 |
| Type: |  Brantly B-2B |
| Owner/operator: | Industrial Air |
| Registration: | N2172U |
| MSN: | |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Other fatalities: | 0 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Northbrook IL -
 United States of America
|
| Phase: | Take off |
| Nature: | Private |
| Departure airport: | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Information verified through data from accident investigation authorities |
LOOSE CARBON UNSEATED NO.3 CYL EXH VALVE. HELICOPTER WAS AT LOW ALT OVER CONJESTED AREA AT TIME.
Accident investigation:
|
Sources:
NTSB
Revision history:
| Date/time | Contributor | Updates |
|---|
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