ASN Wikibase Occurrence # 381139
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| Date: | Saturday 13 August 1983 |
| Time: | 10:35 LT |
| Type: |  Bell 206L-1 |
| Owner/operator: | Offshore Logistic Inc. |
| Registration: | N1081K |
| MSN: | 45407 |
| Year of manufacture: | 1980 |
| Total airframe hrs: | 2499 hours |
| Engine model: | Allison 250-C28B |
| Fatalities: | Fatalities: 0 / Occupants: 6 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Bettles, AK -
 United States of America
|
| Phase: | Taxi |
| Nature: | Unknown |
| Departure airport: | Fairbanks, AK (MTF) |
| Bettles, AK (BTT) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
ACCORDING TO THE PLT, THE LOW FUEL WARNING LIGHT ILLUMINATED WHEN THE FUEL GAGE WAS INDICATING 200 LBS. HE REPORTED HE COULD SEE THE ARPT LIGHTS & ELECTED TO CONTINUE THE FLT. AFTER ARRIVING, HE TERMINATED HIS APCH TO A 30 TO 50 FT HOVER WITH NO FORWARD SPEED. AS HE APPLIED FORWARD CYCLIC TO HOVER TO THE REFUELING AREA, THE ENG FLAMED OUT. SUBSEQUENTLY, THE HELICOPTER LANDED HARD & THE MAIN ROTOR BLADES STRUCK THE TAIL BOOM. AN EXAM REVEAL THERE WAS ENOUGH FUEL REMAINING IN THE MAIN CELL FOR APRX 20 MIN OF FLT. DISASSEMBLY OF THE SYS REVEALED THAT DEBRIS (DIRT & ZINC CHROMATE PAINT CHIPS) WAS IN THE FILTERS. THE FILTER SCREEN HAD OPENINGS OF .020 INCH. PARTICLES WERE FOUND IN THE FLOW SWITCHES. HOWEVER, THE CLEARANCE BETWEEN THE FLOW SWITCH PLUNGER & THE WALL OF THE CASING WAS ONLY .012 INCH. EVIDENCE WAS FOUND TO INDICATE THIS RENDERED A FLOW SWICH INOPERATIVE SO THAT FUEL WOULD NOT TRANSFER FROM THE MAIN CELL TO THE REAR CELL WHERE IT COULD BE USED BY THE ENG.
Probable Cause:
Accident investigation:
 |
|
Sources:
NTSB ANC83FA144
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 02-Apr-2024 00:14 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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