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NTSB Report
February 18, 1991 · Avions Marcel Dassault Mistert Falcon 900 Mistert FA · N90EW
Eagle, CO
Overview
Report Status
Probable Cause
Event Type
Incident
Date
February 18, 1991
Injury Outcomes
No injuries (7 uninjured)
Location
Eagle, CO
Aircraft
Avions Marcel Dassault Mistert Falcon 900 Mistert FA
Tail Number
N90EW
Operator
Aviations Methods
Injuries
None
Aircraft Damage
Minor
NTSB Number
DEN91IA046
N90EW WAS IN A CLIMBING TURN PASSING THROUGH 11500 FEET WHEN THE FLIGHT CREW FELT AND HEARD AN EXPLOSION. COCKPIT INSTRUMENTS INDICATED THAT THE LEFT ENGINE HAD FAILED. THE ENGINE WAS SECURED AND THE AIRCRAFT RETURNED TO EAGLE COUNTY AIRPORT WITHOUT FURTHER INCIDENT. A SUBSEQUENT ENGINE EXAMINATION REVEALED AN ERROR OCCURRED IN THE ASSEMBLY OF THE MATING OF THE INNER TRANSITION LINER TO THE HP TURBINE NOZZLE DURING THE LAST MAJOR PERIODIC MAINTENANCE INSPECTION.
NTSB Probable Cause
IMPROPER ENGINE MAINTENANCE BY MAINTENANCE PERSONNEL, IMPROPER ASSEMBLY OF THE COMBUSTION ASSEMBLY TRANSITION LINER, AND THE RUPTURE OF THE FIRST STAGE LP TURBINE WHEEL.
Full Narrative
N90EW WAS IN A CLIMBING TURN PASSING THROUGH 11500 FEET WHEN THE FLIGHT CREW FELT AND HEARD AN EXPLOSION. COCKPIT INSTRUMENTS INDICATED THAT THE LEFT ENGINE HAD FAILED. THE ENGINE WAS SECURED AND THE AIRCRAFT RETURNED TO EAGLE COUNTY AIRPORT WITHOUT FURTHER INCIDENT. A SUBSEQUENT ENGINE EXAMINATION REVEALED AN ERROR OCCURRED IN THE ASSEMBLY OF THE MATING OF THE INNER TRANSITION LINER TO THE HP TURBINE NOZZLE DURING THE LAST MAJOR PERIODIC MAINTENANCE INSPECTION.
Flight
Event TypeIncident
Event Time16:00 MST
Nearest Airport0nm N
Runway0
Runway Length0
Runway Width0
Flight Plan FiledVfif
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftAvions Marcel Dassault Mistert Falcon 900 Mistert FA
Tail NumberN90EW
Aircraft CategoryAir
DamageMinor
OperatorAviations Methods
Operating RulePart 91
Engines2
Engine TypeTurbojet
Engine DetailsGarrett · TFE 731-5 · Turbojet · 4500
Seats16
People & Injuries
Injury SummaryNo injuries (7 uninjured)
Fatal0
Serious0
Minor0
Uninjured7
Total7
Crew 1Age 49 · None
Conditions
ConditionsVMC
LightDaylight
WindCalm
Visibility20 sm
CeilingNone
Temperature / Dew Point0 C / 0 C
Altimeter0
Weather SourceWIT