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NTSB Report
November 21, 1992 · Swearingen SA-226TC · N139PA
Billings, MT
Overview
Report Status
Probable Cause
Event Type
Accident
Date
November 21, 1992
Injury Outcomes
No injuries (2 uninjured)
Location
Billings, MT
Aircraft
Swearingen SA-226TC
Tail Number
N139PA
Operator
Big Sky Transportation
Injuries
None
Aircraft Damage
Substantial
NTSB Number
SEA93LA027
AFTER GETTING A GEAR UNSAFE LIGHT ON THE RIGHT MAIN LANDING GEAR WHEN THE PILOTS ATTEMPTED TO EXTEND THE LANDING GEAR, THEY ELECTED TO FLY BACK TO THEIR MAINTENANCE FACILITY. AFTER REPEATED ATTEMPTS TO RECTIFY THE PROBLEM, THEY SUCCESSFULLY ACCOMPLISHED A PRECAUTIONARY GEAR UP LANDING. INVESTIGATION REVEALED THAT THE RIGHT MAIN LANDING GEAR DOOR ROLLER WAS FRACTURED AND PREVENTED THE RIGHT MAIN GEAR FROM EXTENDING.
NTSB Probable Cause
FAILURE OF A GEAR DOOR ROLLER, WHICH NECESSITATED A GEAR UP LANDING. FACTORS INCLUDE INADEQUATE LUBRICATION.
Full Narrative
AFTER GETTING A GEAR UNSAFE LIGHT ON THE RIGHT MAIN LANDING GEAR WHEN THE PILOTS ATTEMPTED TO EXTEND THE LANDING GEAR, THEY ELECTED TO FLY BACK TO THEIR MAINTENANCE FACILITY. AFTER REPEATED ATTEMPTS TO RECTIFY THE PROBLEM, THEY SUCCESSFULLY ACCOMPLISHED A PRECAUTIONARY GEAR UP LANDING. INVESTIGATION REVEALED THAT THE RIGHT MAIN LANDING GEAR DOOR ROLLER WAS FRACTURED AND PREVENTED THE RIGHT MAIN GEAR FROM EXTENDING.
Flight
Event TypeAccident
Event Time01:29 MST
Nearest AirportBillings Logan Internat. (0nm N)
Runway27
Runway Length10528 ft
Runway Width150 ft
Flight Plan FiledIFR
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftSwearingen SA-226TC
Tail NumberN139PA
Aircraft CategoryAir
DamageSubstantial
OperatorBig Sky Transportation
Operating RulePart 135
Engines2
Engine TypeTurboprop
Engine DetailsGarrett · TPE-331-10UA · Turboprop · 840
Seats18
People & Injuries
Injury SummaryNo injuries (2 uninjured)
Fatal0
Serious0
Minor0
Uninjured2
Total2
Crew 1Age 40 · First Class
Conditions
ConditionsVMC
LightDark Night
Wind180° @ 6 kt
Visibility20 sm
CeilingNone
Temperature / Dew Point27 C / 19 C
Altimeter30.00 inHg
Observation Time08:39
Weather SourceWFAC