Robinson R22 BETA N821SH
8 October 2006 · Upland, California, United States · No injuries
Summary
On 8 October 2006 at about 20:12 local time, a Robinson R22 BETA registered N821SH, operated by Silver State Helicopters, LLC, was involved in an accident near Upland, California, United States. 2 people were on board and nobody was injured. 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 20:12
- Classification
- Accident
- Location
- Upland, California, United States
- Nearest airport
- Cable (CCB)
- Coordinates
- 34.1117, -117.6872
- Aircraft
- Robinson R22 BETA
- Registration
- N821SH
- Category
- Helicopter
- Engines
- 1
- Operator
- Silver State Helicopters, LLC
- Operating rule
- Part 91: General Aviation
- Purpose of flight
- Instructional
- Phase of flight
- Not recorded
- Route
- Upland → La Verne
- Aircraft damage
- Substantial
- Weather
- VMC
- Light
- Day
- NTSB number
- LAX07LA005
People
Nobody was injured.
| On board | Died | Serious | Minor | Uninjured |
|---|---|---|---|---|
| 2 | 0 | 0 | 0 | 2 |
Probable cause
Disconnection of the throttle control linkage due to improper maintenance, which resulted in a loss of engine power during initial climb.
Quoted verbatim from the NTSB record. This site does not paraphrase or interpret it.
Read the full NTSB narrative
The helicopter's engine suddenly lost power during initial climb on an instructional flight. The certified flight instructor (CFI) took the controls and autorotated to a hard touchdown in a gravel pit. After securing the helicopter, the CFI inspected the throttle linkage. He reported that something appeared disconnected behind the firewall. "When rotating the throttle from full open to full close, the push/pull tube that connects to the carburetor does not move." The subsequent examination of the helicopter's throttle spring assembly revealed that on a previous occasion improper maintenance had been performed. The helicopter's maintenance records did not reflect maintenance in this area. The inspection revealed that the upper rod end bearing was disconnected from the lower portion of the rod because it had not been safety wired as required. This maintenance error resulted in a total loss of throttle control.
Quoted verbatim from the NTSB record.
Other Robinson R22 accidents
| Date | Aircraft | Location | Operator | Outcome | Died |
|---|---|---|---|---|---|
| 28 Aug 2006 | Robinson R22 BETA | Frederick, Maryland, United States | - | No injuries | - |
| 16 Oct 2006 | Robinson R22 BETA | Monticello, Utah, United States | - | No injuries | - |
| 15 Jan 2006 | Robinson R22 | Mariental, Namibia | - | Fatal | 1 |
| 17 Jan 2006 | Robinson R22 | Cape Point, South Africa | Starlight Aviation | Fatal | 1 |
| 24 Sep 2006 | Robinson R22 | Skiatook, Oklahoma, United States | Silver State Helicopters LLC. | No injuries | - |
| 8 Apr 2006 | Robinson R22 BETA | Tooele, Utah, United States | Upper Limit Aviation | Minor injuries | - |
Other accidents in this area
| Date | Aircraft | Location | Operator | Outcome | Died |
|---|---|---|---|---|---|
| 19 Jul 2006 | Beechcraft A36 | Bakersfield, California, United States | - | No injuries | - |
| 15 Jul 2006 | Learjet 55 | Van Nuys, California, United States | Clay Lacy Aviation | No injuries | - |
| 18 Dec 2006 | Beechcraft D95A | Gilroy, California, United States | - | Fatal | 3 |
| 19 Oct 2006 | Boeing 737-790 | Los Angeles, California, United States | - | No injuries | - |
| 20 Oct 2006 | Williams BOWERS FLY BABY-1A | Oakdale, California, United States | - | No injuries | - |
| 22 Oct 2006 | Cessna 152 | Prunedale, California, United States | United Flight Services | Minor injuries | - |