Waco UIC accident near Boise, Idaho, September 20, 1985
On September 20, 1985 at about 6:15 pm local time, a Waco UIC, registered N13572, was substantially damaged in an accident near Boise, Idaho (Boise Air Terminal 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).
Preview. This page is not yet listed for search engines.
The NTSB's probable cause their words, unchanged
The NTSB has not yet published a probable cause for this accident. Investigations usually take one to two years; this page updates when the final report is released.
Source: NTSB aviation accident database, copy made October 4, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- September 20, 1985 · about 6:15 pm local time
- Place
- Boise, Idaho · Boise Air Terminal · map
- Type
- Accident
- Injuries
- No one was hurt; 2 people were on board or involved.
- Weather
- visual conditions (good weather)
- Aircraft
- Waco UIC · all UICs on the register
- Registration
- N13572 · registry record · serial 3821
- Damage
- Substantial damage
- Flight
- Personal flight · general aviation rules (Part 91)
The NTSB's narrative final · quoted from the NTSB record
THE PLT REPORTED THAT WHEN HE LANDED, THE ACFT BEGAN DRIFTING TO THE LEFT. SINCE THERE WAS A HIGH SPEED TURN-OFF AHEAD, HE DID NOT MAKE AN IMMEDIATE CORRECTION FOR THE DRIFT. WHEN A CORRECTION WAS APPLIED, THE ACFT DID NOT RESPOND & IT CONTINUED INTO A GROUND LOOP. THE RIGHT MAIN GEAR THEN COLLAPSED UNDER A SIDE LOAD. DURING A REPAIR, THE RIGHT LANDING GEAR CABANE STRUT WAS FOUND TO HAVE BEEN PREVIOUSLY REPAIRED WITH UNDERSIZED MATERIAL.
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
Pilot
- Certificate: commercial pilot
- Ratings: single-engine land; single-engine sea; instrument: airplane
- Flight time: 3,610 hours in all; 112 in this make and model; 115 in the last 90 days
- Medical certificate: Class 2 (valid medical--w/ waivers/lim.)
- Seat: left
The aircraft
- Last inspection: annual inspection, April 20, 1985; 90 hours since
- Maximum gross weight: 3,000 lb
- Seats: 4
- Landing gear: fixed
- Engine: Continental W-670 (piston); 0 hours total
The flight
- Departed from: LGU Logan UT at 3:45 pm
- Flight plan: VFR
- Runway 10L, 7,400 ft by 150 ft
Weather at the time
- Light: daylight
- Wind: from 250° at 3 knots
- Visibility: 30 statute miles
- Sky: clear
- Temperature: 57°F (14°C), dew point 36°F (2°C)
- Altimeter: 30.00 inHg
- Observation at 5:50 pm from BOI
Injuries
| Fatal | Serious | Minor | None | |
|---|---|---|---|---|
| Crew | 1 | |||
| Passengers | 1 |
Documents from the investigation the NTSB's docket: the evidence folder behind the report
The docket, the folder of records gathered during an investigation (maintenance records, photographs, witness statements, examinations), has not been read from the NTSB for this case yet; the list appears here once it has. Open the docket at the NTSB.
About this page
Everything above comes from the NTSB's public accident database: the narrative, probable cause and findings are the NTSB's own words, and the coded tables behind its report (pilot, aircraft, flight, weather, injuries, sequence of events) are written out in plain English. Pilots' ages, home towns and medical details are left out on purpose. The documents and photographs are the NTSB's docket, the folder of records gathered during the investigation, shown as the NTSB released them (the NTSB redacts some personal details first) and listed under the NTSB's own titles. This site's own text never names pilots, passengers or anyone else involved. A preliminary report describes what is known soon after the event and can change; the final report, with the probable cause, usually follows one to two years later and this page is refreshed when it does. Case number SEA85LA218.