ASN Wikibase Occurrence # 373833
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| Date: | Wednesday 10 December 1986 |
| Time: | 15:00 LT |
| Type: |  Hughes 269C |
| Owner/operator: | Mid States Helicopter, Inc. |
| Registration: | N58188 |
| MSN: | 380675 |
| Year of manufacture: | 1978 |
| Total airframe hrs: | 6118 hours |
| Engine model: | LYCOMING HIO-360-D1A |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Charlotte, NC -
 United States of America
|
| Phase: | En route |
| Nature: | Survey |
| Departure airport: | Burlington, NC (KBUY) |
| Charlotte, NC (8A6) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
WHILE FLYING AT 300' TO 500' AGL ON A CABLE PATROL FLT, THE PLT HEARD A LOUD LOISE. THE ROTOR RPM STARTED TO DECAY & THE ENG RPM INCREASED SHARPLY. THE PLT INITIATED AN AUTOROTATION TO A PARKING LOT, BUT HAD TO MANEUVER TO AVOID TREES & A VEHICLE. THE HELICOPTER TOUCHED DOWN HARD ON THE RGT SKID, COLLAPSING THE SKID & DAMAGING THE MAIN ROTOR BLADES. AN INV REVEALED THE FORWARD COUPLING SPLINES ON THE LOWER PULLEY DRIVE SHAFT, PN 269A5559-3, HAD FAILED, EFFECTIVELY DISCONNECTING THE ENG FROM THE MAIN ROTOR. THE BOOT FOR RETAINING THE LUBRICANT IN THE SPLINE AREA WAS MISSING & THE SPLINE & RECEPTACLE WERE DRY OF LUBRICANT. THE ACDNT OCCURRED ABOUT 71 HRS AFTER THE COUPLINGS HAD BEEN REPACKED WITH LUBRICANT.
Probable Cause:
Accident investigation:
 |
|
Sources:
NTSB ATL87LA040
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 27-Mar-2024 17:46 | ASN Update Bot | Added |
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