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NTSB Report
February 14, 1992 · Swearingen SA-26AT · N26JB
Glenwood Spring, CO
Overview
Report Status
Probable Cause
Event Type
Accident
Date
February 14, 1992
Injury Outcomes
4 injuries (3 serious injuries, 1 minor injury), 1 uninjured
Location
Glenwood Spring, CO
Aircraft
Swearingen SA-26AT
Tail Number
N26JB
Operator
Western Aviators
Injuries
Serious
Aircraft Damage
Destroyed
NTSB Number
DEN92FA035
THE PILOT OF THE AIR AMBULANCE FEATHERED THE RIGHT PROPELLER AFTER REPORTING 'A BIT OF A PROBLEM' WITH THE RIGHT ENGINE. HE ATTEMPTED TO DIVERT TO THE NEAREST SUITABLE AIRPORT, BUT AFTER RECEIVING ITS LATEST WEATHER REPORT, ELECTED TO RETURN TO BASE. THE AIRPLANE MADE A LEFT TURN, REENTERED IMC, AND IMPACTED A MOUNTAINSIDE ON A MAGNETIC HEADING OF 092 DEGREES. THE HEADING TO THE AIRPORT OF INTENDED LANDING WAS 272 DEGREES. THE ACCIDENT OCCURRED DURING A SNOW STORM AT NIGHT. ALL FIVE OCCUPANTS SURVIVED AND WERE RESCUED THE FOLLOWING AFTERNOON. THICK GREASE ON THE RIGHT ENGINE FUEL CONTROL CAM SHAFT PREVENTED A SPRING FROM RETURNING THE 3D CAM TO A LOWER ALTITUDE POSITION. THE CAM WAS FOUND STRUCK ON THE SHAFT AT A POSITION EQUATING TO AN ALTITUDE OF APPROXIMATELY 15,000 FEET. THE FUEL FLOW SCHEDULE FOR FLIGHT IDLE WAS BELOW SPECIFICATIONS. IN ADDITION, SHROUD MATERIAL WAS FOUND DELAMINATED FROM THE LEFT ENGINE SECOND STAGE COMPRESSOR HOUSING.
NTSB Probable Cause
MALFUNCTION OF THE RIGHT ENGINE FUEL CONTROL THAT CAUSED THE ENGINE TO FLAME OUT, AND DELAMINATION OF THE LEFT ENGINE COMPRESSOR SHROUD. FACTORS WERE: THE PILOT BECAME DISORIENTED, THE MOUNTAINOUS TERRAIN, THE DARK NIGHT, AND THE WEATHER CONDITIONS.
Full Narrative
THE PILOT OF THE AIR AMBULANCE FEATHERED THE RIGHT PROPELLER AFTER REPORTING 'A BIT OF A PROBLEM' WITH THE RIGHT ENGINE. HE ATTEMPTED TO DIVERT TO THE NEAREST SUITABLE AIRPORT, BUT AFTER RECEIVING ITS LATEST WEATHER REPORT, ELECTED TO RETURN TO BASE. THE AIRPLANE MADE A LEFT TURN, REENTERED IMC, AND IMPACTED A MOUNTAINSIDE ON A MAGNETIC HEADING OF 092 DEGREES. THE HEADING TO THE AIRPORT OF INTENDED LANDING WAS 272 DEGREES. THE ACCIDENT OCCURRED DURING A SNOW STORM AT NIGHT. ALL FIVE OCCUPANTS SURVIVED AND WERE RESCUED THE FOLLOWING AFTERNOON. THICK GREASE ON THE RIGHT ENGINE FUEL CONTROL CAM SHAFT PREVENTED A SPRING FROM RETURNING THE 3D CAM TO A LOWER ALTITUDE POSITION. THE CAM WAS FOUND STRUCK ON THE SHAFT AT A POSITION EQUATING TO AN ALTITUDE OF APPROXIMATELY 15,000 FEET. THE FUEL FLOW SCHEDULE FOR FLIGHT IDLE WAS BELOW SPECIFICATIONS. IN ADDITION, SHROUD MATERIAL WAS FOUND DELAMINATED FROM THE LEFT ENGINE SECOND STAGE COMPRESSOR HOUSING.
Flight
Event TypeAccident
Event Time20:55 MST
Nearest Airport0nm N
Runway0
Flight Plan FiledIFR
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftSwearingen SA-26AT
Tail NumberN26JB
Aircraft CategoryAir
DamageDestroyed
OperatorWestern Aviators
Operating RulePart 135
Engines2
Engine TypeTurboprop
Engine DetailsGarrett · TPE331-1-151G · Turboprop · 665
Seats6
People & Injuries
Injury Summary4 injuries (3 serious injuries, 1 minor injury), 1 uninjured
Fatal0
Serious3
Minor1
Uninjured1
Total5
Crew 1Age 37 · Second Class
Conditions
ConditionsIMC
LightDark Night
WindCalm
Visibility2 sm
Ceiling300 ft
Temperature / Dew Point34 C / 27 C
Altimeter0
Weather SourceWIT