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NTSB Report
May 19, 2024 · Siai Marchetti SM. 1019 · N992BB
Twin Bridges, MT
Overview
Report Status
Probable Cause
Event Type
Accident
Date
May 19, 2024
Injury Outcomes
No injuries (2 uninjured)
Location
Twin Bridges, MT
Aircraft
Siai Marchetti SM. 1019 (1976)
Tail Number
N992BB
Injuries
None
Aircraft Damage
Substantial
NTSB Number
WPR24LA192
The pilot of the tailwheel-equipped airplane reported that shortly after touchdown, during the landing roll, the tail began to rise, and the airplane subsequently nosed over. Skid marks on the runway were consistent with the right main wheel skidding during landing. The airplane sustained substantial damage to the left wing. A postaccident examination of the airplane revealed that the parking brake cable was binding. This binding prevented full travel of the parking brake to the “OFF” position and not fully release, which resulted in un-commanded braking application during landing roll.
NTSB Probable Cause
The binding of the parking brake cable, which resulted in un-commanded brake application during the landing roll and subsequent nose over.
Full Narrative
The pilot of the tailwheel-equipped airplane reported that shortly after touchdown, during the landing roll, the tail began to rise, and the airplane subsequently nosed over. Skid marks on the runway were consistent with the right main wheel skidding during landing. The airplane sustained substantial damage to the left wing. A postaccident examination of the airplane revealed that the parking brake cable was binding. This binding prevented full travel of the parking brake to the “OFF” position and not fully release, which resulted in un-commanded braking application during landing roll.
Flight
Event TypeAccident
Event Time11:20 MDT
Nearest AirportRuby Valley Field Airport (0nm)
Runway17
Runway Length3000 ft
Runway Width100 ft
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftSiai Marchetti SM. 1019
Tail NumberN992BB
Aircraft CategoryAir
DamageSubstantial
Operating RulePart 91
Engines1
Engine TypeTurboprop
Engine DetailsRolls Royce · 250B-17E · Turboprop · 420
Seats2
People & Injuries
Injury SummaryNo injuries (2 uninjured)
Fatal0
Serious0
Minor0
Uninjured2
Total2
Crew 1Age 72 · Third Class · None
Crew 2None
Conditions
ConditionsVMC
LightDaylight
Wind270° @ 9 kt, gusting 22 kt
Visibility10 sm
CeilingBroken clouds 6000 ft
Temperature / Dew Point46 F / 21 F
Altimeter29.91 inHg
Observation Time11:55
Weather SourceWFAC