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NTSB Report
February 1, 1991 · Beech 200 · N5584M
Indianapolis, IN
Overview
Report Status
Probable Cause
Event Type
Accident
Date
February 1, 1991
Injury Outcomes
No injuries (2 uninjured)
Location
Indianapolis, IN
Aircraft
Beech 200
Tail Number
N5584M
Injuries
None
Aircraft Damage
Substantial
NTSB Number
CHI91LA086
THE TWIN-ENGINED TURBO-PROP AIRPLANE WAS DESCENDING FROM 20,000 FEET MSL TO 7,000 FEET MSL WHEN THE LEFT ENGINE AFT, UPPER ACCESSORY CASE COWL SEPARATED FROM ITS MOUNT. THE COWL ASSEMLBY STRUCK THE LEFT SIDE OF THE FUSELAGE, THE VERTICAL STABILIZER, AND THE HORIZONTAL STABILIZER. THE FUSELAGE STRIKE CAUSED A RAPID DECOMPRESSION. THE AIRPLANE WAS LANDED WITHOUT FURTHER INCIDENT.
NTSB Probable Cause
SEPARATION OF THE AFT, UPPER, ACCESSORY CASE COWL ASSEMBLY FROM THE AIRPLANE, AND INADEQUATE AIRFRAME EQUIPMENT PROVIDED BY THE MANUFACTURER.
Full Narrative
THE TWIN-ENGINED TURBO-PROP AIRPLANE WAS DESCENDING FROM 20,000 FEET MSL TO 7,000 FEET MSL WHEN THE LEFT ENGINE AFT, UPPER ACCESSORY CASE COWL SEPARATED FROM ITS MOUNT. THE COWL ASSEMLBY STRUCK THE LEFT SIDE OF THE FUSELAGE, THE VERTICAL STABILIZER, AND THE HORIZONTAL STABILIZER. THE FUSELAGE STRIKE CAUSED A RAPID DECOMPRESSION. THE AIRPLANE WAS LANDED WITHOUT FURTHER INCIDENT.
Flight
Event TypeAccident
Event Time00:13 EST
Nearest Airport0nm N
Runway0
Runway Length0
Runway Width0
Flight Plan FiledIFR
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftBeech 200
Tail NumberN5584M
Aircraft CategoryAir
DamageSubstantial
Operating RulePart 91
Engines2
Engine TypeTurboprop
Engine DetailsP&W · PT6A-42 · Turboprop · 850
Seats9
People & Injuries
Injury SummaryNo injuries (2 uninjured)
Fatal0
Serious0
Minor0
Uninjured2
Total2
Crew 1Age 33 · Second Class
Conditions
ConditionsVMC
LightBright Night
Wind180° @ 7 kt
Visibility25 sm
CeilingNone
Temperature / Dew Point0 C / 0 C
Altimeter0
Observation Time04:53
Weather SourceWFAC