Sikorsky S-58ET N4247S
4 November 1986 · Becker, Minnesota, United States · Fatal
Summary
On 4 November 1986 at about 22:45 local time, a Sikorsky S-58ET registered N4247S, operated by Helicopter Corp., was involved in an accident near Becker, Minnesota, United States. One person was on board and one died. The aircraft was substantially damaged. No probable cause statement is available for this record.
The record
- Date
- at 22:45
- Classification
- Accident
- Location
- Becker, Minnesota, United States
- Coordinates
- 45.4405, -93.8300
- Aircraft
- Sikorsky S-58ET
- Registration
- N4247S
- Category
- Helicopter
- Engines
- 2
- Operator
- Helicopter Corp.
- Operating rule
- Part 133: Rotorcraft Ext. Load
- Purpose of flight
- Other Work Use
- Phase of flight
- Not recorded
- Aircraft damage
- Substantial
- Weather
- VMC
- Light
- Day
- NTSB number
- CHI87FA015
People
1 person died.
| On board | Died | Serious | Minor | Uninjured |
|---|---|---|---|---|
| 1 | 1 | 0 | 0 | 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 HELICOPTER (HEL) WAS BEING USED ON AN EXTERNAL LOAD OPN TO PSN A 2500 LB VENTILATOR TO THE ROOF OF A BLDG. ON THE NEXT TO LAST LOAD, THE PLT RADIOED THAT HE NOTED A MOMENTARY ILLUMINATION OF THE FUEL BYPASS ADVISORY LIGHT. HE ELECTED TO CONT THE OPN & RETURNED TO THE STAGING AREA TO PICK UP THE 2500 LB LOAD. WHEN THE LOAD WAS APRX 8' FM THE ROOF TOP, WITNESSES NOTED THE LOAD (& HEL) BGN TO SETTLE. THE PLT RLSD THE LOAD AS THE ROTOR RPM BGN DECREASING & MNVRD AWAY FM THE ROOF. THE HEL HOVERED MOMENTARILY OVR AN ELEVATED CONVEYOR, THEN THERE WAS AN ADNL LOSS OF RPM. AS THE HEL DSCNDD, THE MAIN & TAIL ROTORS HIT THE CONVEYOR & THE HEL FELL APRX 150' & CRASHED IN A NOSE DOWN ATTITUDE. THE FWD FUEL BLADDERSPLIT OPEN DRG IMPACT. THE AFT FUEL BLADDER CONTAINED A USABLE, BUT UNDETERMINED, AMOUNT OF FUEL. DIRT WAS FND IN THE FUEL BLADDERS & FUEL FILTERS, BUT NO FUEL BLOCKAGE WAS NOTED. FUEL X-FEED SELECTOR & VLV WERE FND IN THE OPEN PSN. THE FLT MANUAL LIMITS THE USE OF X-FEED FOR EMERGENCY & CRUISE FLT ONLY; BOOST PUMP MUST BE ON WHEN UNUSED TANK IS EMPTY.
Quoted verbatim from the NTSB record.
Other Sikorsky S-58ET accidents
| Date | Aircraft | Location | Operator | Outcome | Died |
|---|---|---|---|---|---|
| 20 Apr 1985 | Sikorsky S-58ET | Gulf of Mexico | - | Fatal | 3 |
| 15 Apr 1989 | Sikorsky S-58ET | Santa Ana, California, United States | - | Minor injuries | - |
| 27 Aug 1992 | Sikorsky S-58ET | North Platte, Nebraska, United States | Crescent Airways, Inc. | Unknown | - |
| 10 Jul 2002 | Sikorsky S-58ET | Brookville, Indiana, United States | Midwest Helicopter Airways | Fatal | 1 |
| 12 Jul 2003 | Sikorsky S-58ET | Rancho P.Verdes, California, United States | - | Serious injuries | - |
| 13 Mar 2011 | Sikorsky S-58ET | El Segundo, California, United States | Aris Helicopters | Serious injuries | - |
Other accidents in this area
| Date | Aircraft | Location | Operator | Outcome | Died |
|---|---|---|---|---|---|
| 25 Jul 1986 | Cessna 152 | Duluth, Minnesota, United States | Crystal Shamrock Aviation | No injuries | - |
| 7 Aug 1986 | Robinson R22A | Eden Prairie, Minnesota, United States | - | No injuries | - |
| 30 May 1986 | Bellanca 7GCBC | E. Grand Forks, Minnesota, United States | - | Fatal | 3 |
| 18 Sep 1986 | Piper PA-31-310 | St. Paul, Minnesota, United States | Northland Aviation, Inc. | No injuries | - |
| 26 Sep 1986 | McCulloch J-2 | Rush City, Minnesota, United States | - | Serious injuries | - |
| 21 Jan 1986 | Bell 206B | Ellendale, Minnesota, United States | - | Fatal | 3 |