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NTSB Report
August 21, 1989 · Dormoy TKD Bathtub TKD Bathtu · N812SS
Carlisle, MN
Overview
Report Status
Probable Cause
Event Type
Accident
Date
August 21, 1989
Injury Outcomes
1 injury (1 minor injury)
Location
Carlisle, MN
Aircraft
Dormoy TKD Bathtub TKD Bathtu
Tail Number
N812SS
Injuries
Minor
Aircraft Damage
Substantial
NTSB Number
MKC89LA184
THE PLT SAID THAT DURING FLT, THE ENG OF THE HOME BUILT ACFT LOST POWER OVER ROUGH TERRAIN. DURING AN EMERGENCY LANDING, THE ACFT ENCOUNTERED TALL GRASS, ROCKS, GOPHER MOUNDS & DOWNWARD SLOPING TERRAIN, AND WAS DAMAGED. AN INVESTIGATION REVEALED THE MIXTURE CONTROL CABLE (PIANO WIRE) HAD FAILED AT A BOLT WHERE IT ATTACHED TO THE MIXTURE CONTROL LEVER. THIS WAS THE 2ND FAILURE DURING THE FLT FROM FARGO, ND TO FERGUS FALLS, MN. THE 1ST FAILURE OCCURRED ABOUT 15 TO 20 MIN INTO THE FLT. THE PLT MADE A SUCCESSFUL FORCED LANDING AFTER THE 1ST FAILURE, THEN BORROWED SOME TOOLS & REPAIRED THE CABLE. THE 2ND FAILURE OCCURRED ABOUT 10 TO 15 MIN AFTER HE TOOK OFF TO CONTINUE THE FLT.
NTSB Probable Cause
FAILURE OF THE MIXTURE CONTROL CABLE AND INADEQUATE MAINTENANCE (REPAIR) BY THE PILOT. THE TERRAIN CONDITIONS WERE CONSIDERED TO BE CONTRIBUTING FACTORS.
Full Narrative
THE PLT SAID THAT DURING FLT, THE ENG OF THE HOME BUILT ACFT LOST POWER OVER ROUGH TERRAIN. DURING AN EMERGENCY LANDING, THE ACFT ENCOUNTERED TALL GRASS, ROCKS, GOPHER MOUNDS & DOWNWARD SLOPING TERRAIN, AND WAS DAMAGED. AN INVESTIGATION REVEALED THE MIXTURE CONTROL CABLE (PIANO WIRE) HAD FAILED AT A BOLT WHERE IT ATTACHED TO THE MIXTURE CONTROL LEVER. THIS WAS THE 2ND FAILURE DURING THE FLT FROM FARGO, ND TO FERGUS FALLS, MN. THE 1ST FAILURE OCCURRED ABOUT 15 TO 20 MIN INTO THE FLT. THE PLT MADE A SUCCESSFUL FORCED LANDING AFTER THE 1ST FAILURE, THEN BORROWED SOME TOOLS & REPAIRED THE CABLE. THE 2ND FAILURE OCCURRED ABOUT 10 TO 15 MIN AFTER HE TOOK OFF TO CONTINUE THE FLT.
Flight
Event TypeAccident
Event Time20:00 CDT
Nearest Airport0nm N
Runway0
Runway Length0
Runway Width0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftDormoy TKD Bathtub TKD Bathtu
Tail NumberN812SS
Aircraft CategoryAir
DamageSubstantial
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsFranklin · 2A-120-B · Reciprocating · 60
Seats1
People & Injuries
Injury Summary1 injury (1 minor injury)
Fatal0
Serious0
Minor1
Uninjured0
Total1
Crew 1Age 46 · Second Class
Conditions
ConditionsVMC
LightDaylight
Wind20° @ 7 kt
Visibility15 sm
CeilingNone
Temperature / Dew Point68 F / 55
Altimeter29.00 inHg
Observation Time22:51
Weather SourceWFAC