N439DSSIKORSKY S-58BT 1990-07-16 NTSB Accident Report

Substantial
None

SIKORSKY S-58BT S/N: 58-658

Summary

On July 16, 1990, a Sikorsky S-58BT (N439DS) was involved in an incident near Ovando, MT. All 1 person aboard were uninjured. The aircraft sustained substantial damage.

The National Transportation Safety Board determined the probable cause of this incident to be: THE PILOT DID NOT MAINTAIN ROTOR RPM AFTER A COMPRESSOR ASSEMBLY BLADE FAILURE. A RELATED FACTOR WAS AN INADEQUATE AUTOROTATION RESULTING IN A HARD LANDING.

This incident is documented in NTSB report SEA90LA137. AviatorDB cross-references NTSB investigation data with FAA registry records to provide comprehensive safety information for aircraft N439DS.

Accident Details

Date
Monday, July 16, 1990
NTSB Number
SEA90LA137
Location
OVANDO, MT
Event ID
20001212X23835
Coordinates
47.069293, -113.040496
Aircraft Damage
Substantial
Highest Injury
None
Fatalities
0
Serious Injuries
0
Minor Injuries
0
Uninjured
1
Total Aboard
1

Probable Cause and Findings

THE PILOT DID NOT MAINTAIN ROTOR RPM AFTER A COMPRESSOR ASSEMBLY BLADE FAILURE. A RELATED FACTOR WAS AN INADEQUATE AUTOROTATION RESULTING IN A HARD LANDING.

Aircraft Information

Registration
Make
SIKORSKY
Serial Number
58-658
Engine Type
Reciprocating
Model / ICAO
S-58BT S58P
Aircraft Type
Rotorcraft
No. of Engines
1

Registered Owner (Historical)

Name
ARIS HELICOPTERS LTD
Address
1138 COLEMAN AVE
Status
Deregistered
City
SAN JOSE
State / Zip Code
CA 95110
Country
United States

Data Source

Data provided by the National Transportation Safety Board (NTSB). For more information on this event, visit the NTSB Records Search website. NTSB# SEA90LA137