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NTSB Report
November 22, 1991 · Grumman AA-1C · N9783U
Lantana, FL
Overview
Report Status
Probable Cause
Event Type
Accident
Date
November 22, 1991
Injury Outcomes
No injuries (2 uninjured, 3 unknown outcomes)
Location
Lantana, FL
Aircraft
Grumman AA-1C
Tail Number
N9783U
Operator
Gluck Brion
Injuries
None
Aircraft Damage
Substantial
NTSB Number
MIA92LA033
DURING CRUISE FLIGHT, ENGINE POWER DROPPED TO 1200 RPM AND COULD NOT BE RESTORED. DURING A FORCED LANDING ON A CITY STREET AT NIGHT THE AIRCRAFT COLLIDED WITH TWO VEHICLES. POSTCRASH EXAMINATION OF THE ENGINE REVEALED THE NUT WHICH ATTACHES THE THROTTLE LINKAGE TO THE CARBURETOR WAS MISSING AND THE THROTTLE LINKAGE HAD BECOME DISCONNECTED. THE ENGINE HAD BEEN OVERHAULED 20 FLIGHT HOURS BEFORE THE ACCIDENT.
NTSB Probable Cause
THE IMPROPER MAINTENANCE ASSEMBLY AND INSPECTION OF THE THROTTLE LINKAGE WHICH RESULTED IN THE THROTTLE LINKAGE BECOMING DISCONNECTED IN FLIGHT AND SUBSEQUENT LOSS OF ENGINE POWER.
Full Narrative
DURING CRUISE FLIGHT, ENGINE POWER DROPPED TO 1200 RPM AND COULD NOT BE RESTORED. DURING A FORCED LANDING ON A CITY STREET AT NIGHT THE AIRCRAFT COLLIDED WITH TWO VEHICLES. POSTCRASH EXAMINATION OF THE ENGINE REVEALED THE NUT WHICH ATTACHES THE THROTTLE LINKAGE TO THE CARBURETOR WAS MISSING AND THE THROTTLE LINKAGE HAD BECOME DISCONNECTED. THE ENGINE HAD BEEN OVERHAULED 20 FLIGHT HOURS BEFORE THE ACCIDENT.
Flight
Event TypeAccident
Event Time21:40 EST
Nearest Airport0nm N
Runway0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftGrumman AA-1C
Tail NumberN9783U
Aircraft CategoryAir
DamageSubstantial
OperatorGluck Brion
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · O-235-L2C · Reciprocating · 115
Seats2
People & Injuries
Injury SummaryNo injuries (2 uninjured, 3 unknown outcomes)
Fatal0
Serious0
Minor0
Uninjured2
Total5
Crew 1Age 27 · First Class
Conditions
ConditionsVMC
LightBright Night
Wind140° @ 12 kt
Visibility10 sm
CeilingNone
Temperature / Dew Point66 F
Altimeter30.00 inHg
Observation Time02:52
Weather SourceWFAC