Robinson R-22 BETA N2407X
23 September 1993 · Livermore, California, United States · Minor injuries
Summary
On 23 September 1993 at about 22:10 local time, a Robinson R-22 BETA registered N2407X, operated by TRI Valley Helicopters, was involved in an accident near Livermore, California, United States. 2 people were on board and 2 had minor injuries. 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 22:10
- Classification
- Accident
- Location
- Livermore, California, United States
- Nearest airport
- Livermore (LVK)
- Coordinates
- 37.6794, -121.7491
- Aircraft
- Robinson R-22 BETA
- Registration
- N2407X
- Category
- Helicopter
- Engines
- 1
- Operator
- TRI Valley Helicopters
- Operating rule
- Part 91: General Aviation
- Purpose of flight
- Unknown
- Phase of flight
- Not recorded
- Aircraft damage
- Substantial
- Weather
- VMC
- Light
- Day
- NTSB number
- LAX93LA367
People
2 people had minor injuries.
| On board | Died | Serious | Minor | Uninjured |
|---|---|---|---|---|
| 2 | 0 | 0 | 2 | 0 |
Probable cause
A partial engine power loss that resulted in a hard landing due to the engine primer system becoming unlocked.
Quoted verbatim from the NTSB record. This site does not paraphrase or interpret it.
Read the full NTSB narrative
THE PILOT HAD STABILIZED THE AIRCRAFT IN A HOVER AND WAS DESCENDING FOR LANDING FROM ABOUT 30 FEET AGL. THE ENGINE SUDDENLY LOST POWER AND THE RATE OF DESCENT INCREASED. THE PILOT ATTEMPTED TO ADD FORWARD CYCLIC TO PERFORM A RUNNING LANDING. THE HELICOPTER LANDED HARD IN A LEVEL ATTITUDE COLLAPSING THE SKIDS AND DAMAGING THE ROTORS AND FUSELAGE. INSPECTION OF THE ENGINE PRIMER SYSTEM DISCLOSED THAT THE PRIMER HANDLE WAS UNLOCKED. THE PRIMER HAD UNLOCKED ON THIS HELICOPTER ON TWO PREVIOUS OCCASIONS.
Quoted verbatim from the NTSB record.
Other Robinson R-22 accidents
| Date | Aircraft | Location | Operator | Outcome | Died |
|---|---|---|---|---|---|
| 11 Aug 1993 | Robinson R-22 BETA | Honolulu, Hawaii, United States | - | Fatal | 2 |
| 8 May 1993 | Robinson R-22 | Corona, California, United States | Parflite Incorporated | Minor injuries | - |
| 26 May 1993 | Robinson R-22 | Pacoima, California, United States | Watson Helicopters | No injuries | - |
| 26 Jun 1993 | Robinson R-22 | Snohomish, Washington, United States | Hickman, Tyrone A. | No injuries | - |
| 27 Nov 1993 | Robinson R-22 | Rockland, Maine, United States | Woollett, Bruce | No injuries | - |
| 18 Jan 1993 | Robinson R-22 BETA | Watsonville, California, United States | Verticare Helicopters | Minor injuries | - |
Other accidents in this area
| Date | Aircraft | Location | Operator | Outcome | Died |
|---|---|---|---|---|---|
| 26 Jul 1993 | Cessna 310H | Lancaster, California, United States | Yehiem Konski | Fatal | 6 |
| 14 Nov 1993 | Cessna 182 | Colusa, California, United States | - | No injuries | - |
| 20 Jan 1993 | Cessna 172P | Sun City, California, United States | Hiser Helicopters, Inc. | Fatal | 1 |
| 31 Jul 1993 | Robinson R44 | El Monte, California, United States | Benjamin F. Venti, SR. | Fatal | 3 |
| 17 Nov 1993 | Piper PA-38-112 | Fresno, California, United States | - | No injuries | - |
| 21 Jan 1993 | Beechcraft A35 | Tulare, California, United States | Rent and Lease Programs | Fatal | 2 |