- Date
- July 25, 1975
- Place
- Keystone, SD · KEYSTONE, SD
- Injuries
- 2 minor, 2 uninjured
- Damage
- Substantial damage
- Phase of flight
- Uncontrolled descent
- Aircraft
- N7578Bell 47-G2A
- Status
- Completed · report September 18, 1975
- Report
- Brief approved by the director
- FAA report
- 19750725022909A
- Case key
- 149977
From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.
On this page
NTSB brief
NTSB’s brief of the accident, as it was printed: the coded facts, with the probable cause and factors.
---------------------------------------------------------------------------------------------------------------------------- FILE DATE LOCATION AIRCRAFT DATA INJURIES FLIGHT PILOT DATA F S M/N PURPOSE ---------------------------------------------------------------------------------------------------------------------------- 3-2275 75/7/25 KEYSTONE,SD BELL 47-G2A CR- 0 0 1 COMMERCIAL COMMERCIAL, AGE 23, 550 TIME - 1430 N7578 PX- 0 0 3 NS CTR PASSG TOTAL HOURS, 102 IN TYPE, DAMAGE-SUBSTANTIAL OT- 0 0 0 INSTRUMENT RATED. NAME OF AIRPORT - RUSHMORE HELIPAD DEPARTURE POINT INTENDED DESTINATION KEYSTONE,SD LOCAL TYPE OF ACCIDENT PHASE OF OPERATION COLLIDED WITH: TREES IN FLIGHT: UNCONTROLLED DESCENT PROBABLE CAUSE(S) PILOT IN COMMAND - FAILED TO MAINTAIN ADEQUATE ROTOR R.P.M. PILOT IN COMMAND - IMPROPER IN-FLIGHT DECISIONS OR PLANNING PILOT IN COMMAND - FAILED TO OBTAIN/MAINTAIN FLYING SPEED PILOT IN COMMAND - EXERCISED POOR JUDGMENT FACTOR(S) WEATHER - HIGH DENSITY ALTITUDE WEATHER BRIEFING - NO RECORD OF BRIEFING RECEIVED WEATHER FORECAST - UNKNOWN/NOT REPORTED SKY CONDITION CEILING AT ACCIDENT SITE SCATTERED 10000 VISIBILITY AT ACCIDENT SITE PRECIPITATION AT ACCIDENT SITE 5 OR OVER(UNLIMITED) NONE OBSTRUCTIONS TO VISION AT ACCIDENT SITE TEMPERATURE-F NONE 90 TYPE OF WEATHER CONDITIONS TYPE OF FLIGHT PLAN VFR NONE
Aircraft
- Registration
- N7578
- Reported as
- Bell 47-G2A
- Category
- Helicopter
- Engine
- reciprocating
- Damage
- Substantial damage
- Airport
- Rushmore Helipad
Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.
FAA reports on this event · 1
The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.
Other investigations on N7578 · 2
Matched to the same aircraft by N-number and date.