Hiller UH-12E N688SB
18 September 1986 · Lemoore, California, United States · Minor injuries
Summary
On 18 September 1986 at about 12:30 local time, a Hiller UH-12E registered N688SB, operated by West Farm Air, was involved in an accident near Lemoore, 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 12:30
- Classification
- Accident
- Location
- Lemoore, California, United States
- Nearest airport
- Lemore Nas (NLC)
- Coordinates
- 36.2909, -119.8191
- Aircraft
- Hiller UH-12E
- Registration
- N688SB
- Category
- Helicopter
- Engines
- 1
- Operator
- West Farm Air
- Operating rule
- Part 137: Agricultural
- Purpose of flight
- Aerial Application
- Phase of flight
- Not recorded
- Aircraft damage
- Substantial
- Weather
- VMC
- Light
- Night/Dark
- NTSB number
- LAX86FVA14
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 REPTD THAT WHILE RETURNING TO THE LOADING AREA AFTER SPRAYING A FIELD, HE HEARD A LOUD POP EMANATING FROM THE ENGINE COMPARTMENT. SHORTLY THEREAFTER HE OBSERVED A FIRE IN THE ENGINE COMPARTMENT AND LOST FORWARD AND AFT CONTROL OF THE HELICOPTER. THE PLT IMMEDIATELY EXECUTED AN AUTOROTATION. THE HELICOPTER ROLLED OVER ONTO ITS SIDE ON TOUCH DOWN. THE POST-ACCIDENT INVESTIGATION ENGINE EXAMINATION DISCLOSED THAT THE NUMBER 3 CONNECTING ROD BOLTS FAILED. FURTHER EXAMINATION REVEALED THAT THE REMAINING CON ROD BOLTS TORQUE VALUES WERE ABT 50% LESS THAN THE REQUIRED VALUES.
Quoted verbatim from the NTSB record.
Other Hiller UH-12E accidents
| Date | Aircraft | Location | Operator | Outcome | Died |
|---|---|---|---|---|---|
| 15 Jul 1986 | Hiller UH-12E | Pataskala, Ohio, United States | Agri-Copter, Inc. | No injuries | - |
| 13 Sep 1986 | Hiller UH-12E | Norias, Texas, United States | - | No injuries | - |
| 7 Sep 1986 | Hiller UH 12E | Gonzales, California, United States | - | No injuries | - |
| 7 Feb 1986 | Hiller UH-12E | Lodi, California, United States | Alpine Helicopter Service, Inc | No injuries | - |
| 17 Jun 1986 | Hiller UH-12E | Delano, California, United States | - | No injuries | - |
| 29 Sep 1986 | Hiller UH-12E | Visalia, California, United States | - | Fatal | 1 |
Other accidents in this area
| Date | Aircraft | Location | Operator | Outcome | Died |
|---|---|---|---|---|---|
| 29 Jun 1986 | Cessna 150 | Hesperia, California, United States | - | No injuries | - |
| 1 Nov 1986 | Luscombe 8A | Half Moon Bay, California, United States | - | No injuries | - |
| 28 Jun 1986 | Schleicher ASW-19 | Warner Springs, California, United States | Mark A. Miller | No injuries | - |
| 2 Nov 1986 | Learjet 24 | Lake Tahoe, California, United States | - | No injuries | - |
| 30 Jun 1986 | Piper PA-18-150 | Ukiah, California, United States | - | No injuries | - |
| 6 Nov 1986 | Beechcraft K35 | San Diego, California, United States | Dean Holt | Minor injuries | - |