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NTSB Report
March 22, 1990 · British Aerospace HS125-800 · N802X
Atlanta, GA
Overview
Report Status
Probable Cause
Event Type
Incident
Date
March 22, 1990
Injury Outcomes
No injuries (3 uninjured)
Location
Atlanta, GA
Aircraft
British Aerospace HS125-800
Tail Number
N802X
Operator
Exxon
Injuries
None
NTSB Number
FTW90IA086
THE CORPORATE JET WAS CRUISING AT FL330 WHEN THE PILOT NOTED THAT THE AILERONS WERE LOCKED. HE FOUND THAT THE AFT LAVATORY WATER SYSTEM HAD LEAKED TWO AND A HALF GALLONS OF POTABLE WATER INTO THE KEEL AREA OF THE FUSELAGE AROUND THE AILERON CABLES AND PULLEYS. THE PILOT SURMISED THAT THE WATER WAS FROZEN AROUND THE CABLES AND DECLARED AN EMERGENCY. THE OUTSIDE AIR TEMPERATURE WAS -50 C. DURING FINAL APPROACH, AILERON CONTROL WAS REGAINED AND A NORMAL LANDING WAS ACCOMPLISHED. EXAMINATION OF THE LAVATORY WATER SYSTEM REVEALED A CRACKED COPPER OUTPUT LINE ON THE WATER HEATER UNIT.
NTSB Probable Cause
THE LEAKING AFT LAVATORY WATER HEATER UNIT.
Full Narrative
THE CORPORATE JET WAS CRUISING AT FL330 WHEN THE PILOT NOTED THAT THE AILERONS WERE LOCKED. HE FOUND THAT THE AFT LAVATORY WATER SYSTEM HAD LEAKED TWO AND A HALF GALLONS OF POTABLE WATER INTO THE KEEL AREA OF THE FUSELAGE AROUND THE AILERON CABLES AND PULLEYS. THE PILOT SURMISED THAT THE WATER WAS FROZEN AROUND THE CABLES AND DECLARED AN EMERGENCY. THE OUTSIDE AIR TEMPERATURE WAS -50 C. DURING FINAL APPROACH, AILERON CONTROL WAS REGAINED AND A NORMAL LANDING WAS ACCOMPLISHED. EXAMINATION OF THE LAVATORY WATER SYSTEM REVEALED A CRACKED COPPER OUTPUT LINE ON THE WATER HEATER UNIT.
Flight
Event TypeIncident
Event Time19:30 EST
Nearest Airport0nm N
Runway0
Runway Length0
Runway Width0
Flight Plan FiledIFR
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftBritish Aerospace HS125-800
Tail NumberN802X
Aircraft CategoryAir
OperatorExxon
Operating RulePart 91
Engines2
Engine TypeTurbofan
Engine DetailsGarrett · 731-5R-1H · Turbofan · 4300
Seats8
People & Injuries
Injury SummaryNo injuries (3 uninjured)
Fatal0
Serious0
Minor0
Uninjured3
Total3
Crew 1Age 50 · First Class
Conditions
ConditionsVMC
LightDaylight
Wind190° @ 7 kt
Visibility25 sm
CeilingNone
Temperature / Dew Point63 F / 25 C
Altimeter30.00 inHg
Observation Time23:50
Weather SourceWFAC