Accident Details
Date
Sunday, November 11, 1990
NTSB Number
ATL91IA017
Location
ATLANTA, GA
Event ID
20001212X24563
Aircraft Damage
Unknown
Highest Injury
None
Fatalities
0
Serious Injuries
0
Minor Injuries
0
Uninjured
75
Total Aboard
75
Probable Cause and Findings
FROZEN MOISTURE IN THE STABILIZER ACTUATOR HYDRAULIC SERVO VALVE WHICH RESULTED IN REDUCED MOVEMENT OF THE SERVO VALVE AND LIMITED ITS ABILITY TO RESPOND TO FLIGHT CONTROL INPUTS. THE LACK OF RESPONSE FROM THE SERVO VALVE RESULTED IN THE JAMMED STABILIZER MESSAGE. A FACTOR WAS THE INADEQUATE DESIGN OF THE SERVO VALVE WHICH PRECLUDED MOISTURE DRAINAGE.
Aircraft Information
Registration
N850US
Make
FOKKER
Serial Number
11276
Engine Type
Turbo-jet
Registered Owner (Historical)
Name
WILMINGTON TRUST CO TRUSTEE
Address
1100 N MARKET ST
RODNEY SQUARE N
Status
Deregistered
City
WILMINGTON
State / Zip Code
DE 19890
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# ATL91IA017