N7441F

Substantial
None

HUGHES 269C S/N: 460487

Accident Details

Date
Wednesday, May 23, 1990
NTSB Number
LAX90LA187
Location
RIALTO, CA
Event ID
20001212X23186
Coordinates
34.099674, -117.380584
Aircraft Damage
Substantial
Highest Injury
None
Fatalities
0
Serious Injuries
0
Minor Injuries
0
Uninjured
1
Total Aboard
1

Probable Cause and Findings

IMPROPER MAINTENANCE PROCEDURE BY MAINTENANCE PERSONNEL TO TROUBLESHOOT A REPORTED DEFICIENCY AND THE PILOT'S DECISION TO DEMONSTRATE THE VIBRATION, EXCEEDING THE DESIGN LIMITS OF THE HELICOPTER AND INDUCING GROUND RESONANCE. CONTRIBUTING TO THE ACCIDENT WAS THE LOW NITROGEN CHARGE OF THE LANDING GEAR DAMPERS.

Aircraft Information

Registration
N7441F
Make
HUGHES
Serial Number
460487
Year Built
1978
Model / ICAO
269C

Registered Owner (Historical)

Name
WILLIAMS BRADLEY S DBA
Address
906 S BROADWAY AVE
Status
Deregistered
City
SALEM
State / Zip Code
IL 62881-2363
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# LAX90LA187