Aerospatiale AS-350D N141EH
12 July 1983 · Dutch Harbor, Alaska, United States · Serious injuries
Summary
On 12 July 1983 at about 00:23 local time, a Aerospatiale AS-350D registered N141EH was involved in an accident near Dutch Harbor, Alaska, United States. 4 people were on board and one was seriously injured, 3 had minor injuries. The aircraft was destroyed. No probable cause statement is available for this record.
The record
- Date
- at 00:23
- Classification
- Accident
- Location
- Dutch Harbor, Alaska, United States
- Coordinates
- 53.8900, -166.5406
- Aircraft
- Aerospatiale AS-350D
- Registration
- N141EH
- Category
- Helicopter
- Engines
- 1
- Operator
- Not recorded
- Operating rule
- Part 135: Air Taxi & Commuter
- Purpose of flight
- Unknown
- Phase of flight
- Not recorded
- Route
- Unknown → Dutch Harbor
- Aircraft damage
- Destroyed
- Weather
- VMC
- Light
- Day
- NTSB number
- ANC83FA122
People
1 person was seriously injured.
| On board | Died | Serious | Minor | Uninjured |
|---|---|---|---|---|
| 4 | 0 | 1 | 3 | 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
APRX 2 MIN AFTER TAKEOFF, THE PLT & PASSENGERS HEARD A LOUD MUFFLED BOOM FROM BEHIND THE FIREWALL, THEN THE ROTOR RPM BEGAN TO DECAY. THE PLT ENTERED AN AUTOROTATION & SELECTED A LANDING AREA. HE NOTED THAT THE ENG WAS NOT DRIVING THE ROTOR SYS, SO HE SHUT IT DOWN TO REDUCE THE POSSIBILITY OF FIRE WHILE LANDING. DURING AN EMERGENCY LANDING ON SLOPING, MOUNTAINOUS TERRAIN, THE HELICOPTER ROLLED OVER, AND SUBSEQUENTLY, IT CAME TO REST IN A RAVINE AT THE BOTTOM OF THE SLOPE. A TEARDOWN OF THE ENG REVEALED THAT THE #3 BEARING, PN 4-301-051-02, HAD FAILED & THAT THE OIL JET FOR THE BEARING WAS CLOGGED. REPORTEDLY, MAINTENANCE PERSONNEL WERE AWARE THAT A DIFFERENTIAL PRESSURE CHECK, TO DETECT CLOGGING TO THE #2 & #3 PACKAGED OIL JETS, WAS 7 TO 8 PSI. THIS WAS 2 TO 3 PSI TOO HIGH & INDICATED CLOGGING OF THE OIL JETS. (THIS PROCEDURE WAS OUTLINED IN LYCOMING SVC BULLETIN LTS101A-17-0014). HOWEVER, THE DISCREPANCY WAS NOT ENTERED IN THE ENG MAINTENANCE LOGS.
Quoted verbatim from the NTSB record.
Other Aerospatiale AS-350D accidents
| Date | Aircraft | Location | Operator | Outcome | Died |
|---|---|---|---|---|---|
| 18 May 1983 | Aerospatiale AS-350D | Venice, Louisiana, United States | - | Fatal | 1 |
| 1 Mar 1983 | Aerospatiale AS-350D | E. Cameron | - | No injuries | - |
| 26 Apr 1982 | Aerospatiale AS-350D | Houston, Texas, United States | Air-Op, Inc. | No injuries | - |
| 19 Jul 1982 | Aerospatiale AS-350D | Gulf of Mexico | Petroleum Helicopter, Inc. | No injuries | - |
| 19 Jun 1984 | Aerospatiale AS-350D | Island Beach, New Jersey, United States | - | Fatal | 3 |
| 11 Jul 1985 | Aerospatiale AS-350D | Matagorda Islng, Louisiana, United States | - | Fatal | 1 |
Other accidents in this area
| Date | Aircraft | Location | Operator | Outcome | Died |
|---|---|---|---|---|---|
| 8 Jun 1983 | Cessna 182 | Bettles, Alaska, United States | John Pletting | No injuries | - |
| 19 Jun 1983 | Piper PA-18 | Squaw Lake, Alaska, United States | - | No injuries | - |
| 24 Jun 1983 | Piper PA-18 | Palmer, Alaska, United States | - | No injuries | - |
| 27 Jun 1983 | Piper J-3 | Skwentna, Alaska, United States | - | Minor injuries | - |
| 26 Jun 1983 | Cessna 170 | Fairbanks, Alaska, United States | - | No injuries | - |
| 28 Jun 1983 | Cessna 180 | King Salmon, Alaska, United States | - | No injuries | - |