Siai Marchetti SM. 1019 accident near Twin Bridges, Montana, May 19, 2024
On May 19, 2024 at about 5:20 pm local time, a 1976 Siai Marchetti SM. 1019, registered N992BB, was substantially damaged in an accident during landing (landing roll) near Twin Bridges, Montana (Ruby Valley Field Airport). It was a personal flight under general aviation rules (Part 91). No one was hurt; 2 people were on board or involved. The weather was visual conditions (good weather).
The NTSB's probable cause their words, unchanged
The binding of the parking brake cable, which resulted in un-commanded brake application during the landing roll and subsequent nose over.
Source: NTSB aviation accident database, copy made October 5, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- May 19, 2024 · about 5:20 pm local time
- Place
- Twin Bridges, Montana · Ruby Valley Field Airport · map
- Type
- Accident
- Injuries
- No one was hurt; 2 people were on board or involved.
- Weather
- visual conditions (good weather)
- Aircraft
- Siai Marchetti SM. 1019, built 1976
- Registration
- N992BB · registry record · serial 012
- Damage
- Substantial damage
- Flight
- Personal flight · general aviation rules (Part 91)
The NTSB's narrative final · quoted from the NTSB record
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.
The complete narrative as the NTSB published it. The NTSB's docket holds the report as a PDF and any photographs, statements and other documents from the investigation.
The factual record from the NTSB's investigation tables, in plain English
What happened, in order
- Nose over/nose down during landing (landing roll)
- Sys/Comp malf/fail (non-power) during landing (landing roll) defining event
The NTSB's findings
- Aircraft › Aircraft systems › Landing gear system › Landing gear brakes system › Malfunction
- Aircraft › Aircraft oper/perf/capability › Aircraft capability › Braking capability › Malfunction
Pilot
- Certificate: private
- Ratings: multi-engine land; single-engine land; single-engine sea; instrument: airplane
- Flight time: 8,306 hours in all; 460 in this make and model; 39 in the last 90 days; 20.7 in the last 30 days; 8,246 as pilot in command
- Last flight review: September 20, 2023
- Medical certificate: Class 3 (waiver time limited special)
- Seat: frt
- Injury: no injuries
Passenger
- Seat: rear
- Injury: no injuries
The aircraft
- Airframe total time: 2,765.4 hours
- Last inspection: condition inspection, January 15, 2024; 3.6 hours since
- Seats: 2
- Landing gear: fixed
- Engine: Rolls Royce 250B-17E (turboprop); 2,033 hours total
The flight
- Departed from: EKS Ennis MT at 5:03 pm
- Flight plan: none
- Runway 17, 3,000 ft by 100 ft
Weather at the time
- Light: daylight
- Wind: from 270° at 9 knots, gusting 22
- Visibility: 10 statute miles
- Sky: broken clouds at 6,000 ft
- Temperature: 46°F (8°C), dew point 21°F (-6°C)
- Altimeter: 29.91 inHg
- Observation at 11:55 am from KWYS, 71 miles away
Weather report (METAR): METAR KWYS 191755Z AUTO 27009G22KT 240V320 10SM BKN060 08/M06 A2991 RMK AO2
Injuries
| Fatal | Serious | Minor | None | |
|---|---|---|---|---|
| Flight crew | 1 | |||
| Passengers | 1 |
Documents from the investigation the NTSB's docket: the evidence folder behind the report
3 documents, released by the NTSB on February 11, 2025. View them here, or download them; the NTSB redacts some personal details before release, and this site shows the NTSB's own titles rather than its file names.
| # | Document | What it is | |
|---|---|---|---|
| 1 | Pilot/operator Aircraft Accident Report, NTSB Form 6120.1 | PDF, 10 pages | View Download |
| 2 | Photos | PDF, 4 pages | View Download |
| 3 | Memorandum for Record A�� FAA Email Correspondence | PDF, 1 page | View Download |
The same docket at the NTSB · documents without a copy here are fetched from the NTSB when you open them.
Everything on this page comes from the NTSB's public records. The narrative, probable cause and findings are the NTSB's own words; the coded tables behind the report are written out in plain English, with pilots' ages, home towns and medical details left out. The documents and photographs are the NTSB's docket, shown as the NTSB released them. This site's own text never names anyone involved. A preliminary report can change; the final report usually follows one to two years later, and the page is refreshed when it does.