Ayres S-2R N4216X
6 May 1987 · Williams, California, United States · Minor injuries
Summary
On 6 May 1987 at about 02:15 local time, a Ayres S-2R registered N4216X, operated by Robert B. Caldwell, was involved in an accident near Williams, California, United States. One person was on board and one had minor injuries. The aircraft was substantially damaged. No probable cause statement is available for this record.
The record
- Date
- at 02:15
- Classification
- Accident
- Location
- Williams, California, United States
- Coordinates
- 39.1091, -122.2709
- Aircraft
- Ayres S-2R
- Registration
- N4216X
- Category
- Airplane
- Engines
- 1
- Operator
- Robert B. Caldwell
- Operating rule
- Part 137: Agricultural
- Purpose of flight
- Aerial Application
- Phase of flight
- Not recorded
- Aircraft damage
- Substantial
- Weather
- VMC
- Light
- Day
- NTSB number
- LAX87DVG06
People
1 person had minor injuries.
| On board | Died | Serious | Minor | Uninjured |
|---|---|---|---|---|
| 1 | 0 | 0 | 1 | 0 |
Probable cause
The NTSB has not published a probable cause for this record. No probable cause statement is present in the source data.
Nothing about the cause is stated here that is not in the source record.
Read the full NTSB narrative
THE PLT REPORTED HE HEARD SOMETHING BREAK. THE SOUND WAS FOLLOWED BY A VIBRATION. THE PLT THEN TURNED TO LAND ON A ROAD. HE WAS UNABLE TO MAINTAIN ALT AND AIRSPEED. THE ROCKWELL S2R LANDED IN A CULTIVATED FIELD AND NOSED OVER AFTER A COLLISION WITH A DIRT BANK. POST ACCIDENT EXAM OF THE PROP HUB ASSEMBLY REVEALED THAT THE COUNTERWEIGHT BEARING SHAFT WAS FRACTURED ON ONE OF THE PROP BLADES. THIS WOULD ALLOW ONE PROP BLADE TO ROTATE AT A DIFFERENT PITCH ANGLE. THE ROCKWELL S2R HAD A TWO BLADED HAMILTON STANDARD 12D40-305 PROP INSTALLED. IT HAD BEEN MODIFIED IN ACCORDANCE WITH STC #SP1408NW WHICH REPLACES THE HAMILTON STANDARD COUNTERWEIGHT BEARINGS WITH MIDWEST AVIATION ROLLERS.
Quoted verbatim from the NTSB record.
Other Ayres S-2R accidents
| Date | Aircraft | Location | Operator | Outcome | Died |
|---|---|---|---|---|---|
| 19 May 1986 | Ayres S-2R | Odessa, Washington, United States | Odessa Farming Services | No injuries | - |
| 24 Jul 1986 | Ayres S-2R | Kuna, Idaho, United States | - | Fatal | 1 |
| 17 Jun 1986 | Ayres S-2R | Liverpool, Texas, United States | - | Serious injuries | - |
| 14 Sep 1989 | Ayres S-2R | Yuma, Arizona, United States | Schmit Robert, Schmit Doug | Serious injuries | - |
| 27 Jun 1990 | Ayres S-2R | Fort Pierce, Florida, United States | Sunniland Aircraft Sales, Inc. | No injuries | - |
| 15 Jun 1983 | Ayres S-2R | Arlington, Georgia, United States | - | No injuries | - |
Other accidents in this area
| Date | Aircraft | Location | Operator | Outcome | Died |
|---|---|---|---|---|---|
| 1 Nov 1987 | Durbin MONNETT MONI | Ramona, California, United States | Lipner, Robert M. | Serious injuries | - |
| 24 Dec 1987 | Bede BD-5 | Chula Vista, California, United States | Teufel, Armin U. | Fatal | 1 |
| 25 Oct 1987 | Stits ELKINS 85 | Camarillo, California, United States | - | Fatal | 1 |
| 21 Nov 1987 | Isgrigg ELITE | Tehachapi, California, United States | Isgrigg, John | Minor injuries | - |
| 27 Dec 1987 | Rolladen-Schneider LS-3 | Santa Ynez, California, United States | - | Serious injuries | - |
| 1 Jan 1987 | Cessna 152 | San Dimas, California, United States | King Aviation | Minor injuries | - |