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NTSB Report
July 25, 1990 · De Havilland DHC-8-100 · N800MX
Panama City, FL
Overview
Report Status
Probable Cause
Event Type
Incident
Date
July 25, 1990
Injury Outcomes
No injuries (28 uninjured)
Location
Panama City, FL
Aircraft
De Havilland DHC-8-100
Tail Number
N800MX
Operator
Eastern Metro Express
Injuries
None
NTSB Number
MIA90IA159
DURING AN ATTEMPTED TAKEOFF ROLL THE CREW NOTED A WARNING LIGHT INDICATING WING SPOILER DEPLOYMENT AND ABORTED THE TAKEOFF. COMPANY MAINTENANCE PERSONNEL DEACTIVATED THE WING SPOILER SYSTEM AND THE WING SPOILER WARNING SYSTEM. AFTER TAKEOFF THE CREW EXPERIENCED ROLL CONTROL DIFICULTY AND RETURNED AND LANDED. EXAMINATION REVEALED THAT THE RIGHT OUTBOARD SPOILER PANEL HAD DEPLOYED WITH NO WARNING. THE ACTUATOR WAS REMOVED AND THE HYDRAULIC SEAL WAS FOUND CUT AND LEAKING AROUND THE PISTON THAT WAS WORN BEYOND SERVICABLE LIMITS.
NTSB Probable Cause
FAILURE OF SEAL IN THE HYDRAULIC ACTUATOR FOR THE RIGHT OUTBOARD WING SPOILER PANEL FOR UNKNOWN REASONS.
Full Narrative
DURING AN ATTEMPTED TAKEOFF ROLL THE CREW NOTED A WARNING LIGHT INDICATING WING SPOILER DEPLOYMENT AND ABORTED THE TAKEOFF. COMPANY MAINTENANCE PERSONNEL DEACTIVATED THE WING SPOILER SYSTEM AND THE WING SPOILER WARNING SYSTEM. AFTER TAKEOFF THE CREW EXPERIENCED ROLL CONTROL DIFICULTY AND RETURNED AND LANDED. EXAMINATION REVEALED THAT THE RIGHT OUTBOARD SPOILER PANEL HAD DEPLOYED WITH NO WARNING. THE ACTUATOR WAS REMOVED AND THE HYDRAULIC SEAL WAS FOUND CUT AND LEAKING AROUND THE PISTON THAT WAS WORN BEYOND SERVICABLE LIMITS.
Flight
Event TypeIncident
Event Time16:50 CDT
Nearest Airport0nm N
Runway0
Runway Length0
Runway Width0
Flight Plan FiledIFR
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftDe Havilland DHC-8-100
Tail NumberN800MX
Aircraft CategoryAir
OperatorEastern Metro Express
Operating RulePart 121
Engines2
Engine TypeTurboprop
Engine DetailsP&W · 121A · Turboprop · 2150
Seats74
People & Injuries
Injury SummaryNo injuries (28 uninjured)
Fatal0
Serious0
Minor0
Uninjured28
Total28
Crew 1Age 27 · First Class
Conditions
ConditionsVMC
LightDaylight
Wind340° @ 8 kt
Visibility7 sm
CeilingNone
Temperature / Dew Point70 F
Altimeter0
Observation Time21:57
Weather SourceWFAC