Waco UBF airworthiness directives

Manufacturer (registry): WACO
Model: UBF
Registry code: 9600404
Registered: 13 aircraft
Type: Fixed wing single engine
Engines: 1 · Reciprocating
Seats: 3
Weight class: Up to 12,499 lb
Cruise speed: 79 mph
Certification: Type certificated
Data sheet: TCDSATC 473
Holder: The Waco Aircraft Company

Model codes come from the FAA registry’s reference file. ADs are matched to them by model name and maker.

On this page

Aircraft by year built · 13

1932Registered nowDeregistered2026

Aircraft by the year they were built: 13 aircraft
1932	6
1933	6
2002	1

Airworthiness directives that may apply · 0

ADs whose products match this airframe model. Each AD’s applicability may narrow it by serial number, part number or configuration.

No ADs matched this model

Registered aircraft · 13

N12002Coonan Gary M · Bell Buckle, TNS/N 3619 N12443Steeves Brian · Wahpeton, NDBuilt 1932 · S/N 3606 N1244GFlyboy LLC · Tampa, FLBuilt 1932 · S/N 3607 N13027Western Antique Aeroplane & Automobile Museum · Hood River, ORBuilt 1932 · S/N 3660 N13071Period Aviation LLC · Babylon, NYBuilt 1933 · S/N 3689 N13074Borgerson Mark J · Montevideo, MNBuilt 1933 · S/N 3691 N13075Braatz Ronald W · Bend, ORBuilt 1933 · S/N 3692 N13419Ray Jimmy · Southlake, TXBuilt 1933 · S/N 3762 N13442Owls Head Transportation Museum · Owls Head, MEBuilt 1932 · S/N 3766 N13444Dream Waco LLC · Oklahoma City, OKBuilt 1933 · S/N 3763 N13446Prince William H · Beverly, MABuilt 1933 · S/N 3765 N155YTexas Barnstorming Museum · Hallettsville, TXBuilt 1932 · S/N 3618 N2091KCournoyer John J · Ellsinore, MOBuilt 1932 · S/N 3608

Query with SQL

duckdb -csv -c "SELECT n_number, serial_number, year_manufactured, status, registrant_name, registrant_city, registrant_state
  FROM 'https://openairdocs.org/data/latest/faa_aircraft_registration.parquet'
  WHERE aircraft_model_code IN ('9600404')
  ORDER BY n_number"

Prints the whole list as CSV. It reads the release’s Parquet files over HTTPS, so there’s nothing to download first. Install DuckDB to run it.

SELECT n_number, serial_number, year_manufactured, status, registrant_name, registrant_city, registrant_state
FROM 'https://openairdocs.org/data/latest/faa_aircraft_registration.parquet'
WHERE aircraft_model_code IN ('9600404')
ORDER BY n_number

Run it at the DuckDB prompt, or in any tool that reads Parquet over HTTPS. More ways to query the release are on Use the data.

STCs approved for this model · 12

STC SA02033ATModification to install an air-oil separator to prevent oil from being aspirated from the engine breather line.M-20 Oil Separators LLC STC SA04652CHTo allow use of 100R grade aviation fuel meeting Swift Fuel, LLC specificationSwift Fuels LLC STC SA04776NY (1 OF 2)The HIPEC Covering and Finishing System must be performed and maintainedHIPEC Aircraft Coatings Inc.STC SA1008WEInstallation of Poly-Fiber covering material.Poly-Fiber Inc.STC SA2190NM PAGE 2Installation of electronics International Digital Volt/Amp Gauges and Accessories.Electronics International STC SA2350NM PAGE 2Installation of Electronics International Inc digital carburetor/outside air temperature gaugesElectronics International STC SA2687NMInstallation of Truboplus/ Electronics Int'l gauges and switches.Aero Manufacturing Inc.STC SA2693NMInstallation of Electronics International digital volt/amp gauges and accessories.Electronics International Inc.STC SA4503NMRemove original cloth covering and install Ceconite coveringCeconite Division of Poly-Fiber Inc.STC SA628WECeconite 101 covering of entire airframe.Cooper Engineering Corporation STC SA8075SWInstallation of fiberglass covering. (M-62 SERIES PT-19) (G-73 SCHWEIZER)Razorback Fabrics Inc STC SA2350NMInstallation of Electronics International Inc digital carburetor/outside air temperature gauges listed on the attached continuation sheet and the associated accessories.Electronics International

Query with SQL

duckdb -csv -c "SELECT s.stc_number, s.description, s.holder, s.status, s.status_date
  FROM 'https://openairdocs.org/data/latest/faa_stc.parquet' s
  WHERE s.stc_number IN (SELECT stc_number FROM 'https://openairdocs.org/data/latest/faa_stc_model.parquet' WHERE model_key = 'UBF')
  ORDER BY s.status = 'Current' DESC, s.stc_number"

Prints the whole list as CSV. It reads the release’s Parquet files over HTTPS, so there’s nothing to download first. Install DuckDB to run it.

SELECT s.stc_number, s.description, s.holder, s.status, s.status_date
FROM 'https://openairdocs.org/data/latest/faa_stc.parquet' s
WHERE s.stc_number IN (SELECT stc_number FROM 'https://openairdocs.org/data/latest/faa_stc_model.parquet' WHERE model_key = 'UBF')
ORDER BY s.status = 'Current' DESC, s.stc_number

Run it at the DuckDB prompt, or in any tool that reads Parquet over HTTPS. More ways to query the release are on Use the data.

NTSB investigations · 3

Aircraft matched to this model through the registry, by N-number and event date.

Defining event, 2008 on

Loss of control on ground1 case

Of 1 case NTSB coded with a defining event. All defining events

In the probable cause, 2008 on

Findings NTSB made part of the probable cause. A case can have several. All findings

First occurrence, 1982 to 2007

Of 2 cases with NTSB’s older coding, defined in its coding manual.

NTSB ERA25LA319Accident · No injuriesClass 4 · LimitedFinal reportWaco UBF · Tampa, FLThe pilot’s failure to maintain directional control during landing roll, which resulted in a runway excursion and collision with an object.Jul 31, 2025 · N1244G · Substantial damage NTSB SEA91LA166Accident · No injuriesLimited investigationFinal reportWaco UBF · Lincoln City, ORImproper planning/decision by the pilot, and his delay in aborting the takeoff. The tailwind & proximity of trees/brush were related factors.Aug 11, 1991 · N13075 · Substantial damage NTSB LAX82DA189Accident · Minor injuriesFinal reportPiper PA-44-180 · Chandler, AZThe pilot departed Chandler, AZ with the fuel gauges indicating 40 plus gallons in each tank. After a 1.2 hr flight to lake havasu city, AZ, the gauges indicated 20 plus gallons in each tank. During the return trip to Chandler at night, both engines lost…May 23, 1982 · N2091K · Destroyed

Query with SQL

SELECT c."ntsbNumber", c."eventDate", c."eventType", c."eventCity", c."eventStateOrRegion", a.n_number, a."aircraftMake", a."aircraftModel", c."highestInjuryLevel", c."totalFatal", c."completionStatus", c.report_url FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' a JOIN 'https://openairdocs.org/data/latest/ntsb_case_detail.parquet' c ON c."mKey" = a.case_mkey WHERE a.aircraft_model_code IN ('9600404') ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC

duckdb -csv -c "SELECT c.\"ntsbNumber\", c.\"eventDate\", c.\"eventType\", c.\"eventCity\", c.\"eventStateOrRegion\", a.n_number, a.\"aircraftMake\", a.\"aircraftModel\", c.\"highestInjuryLevel\", c.\"totalFatal\", c.\"completionStatus\", c.report_url
  FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' a JOIN 'https://openairdocs.org/data/latest/ntsb_case_detail.parquet' c ON c.\"mKey\" = a.case_mkey
  WHERE a.aircraft_model_code IN ('9600404')
  ORDER BY c.\"eventDate\" DESC, c.\"ntsbNumber\" DESC"

Prints the whole list as CSV. It reads the release’s Parquet files over HTTPS, so there’s nothing to download first. Install DuckDB to run it.

SELECT c."ntsbNumber", c."eventDate", c."eventType", c."eventCity", c."eventStateOrRegion", a.n_number, a."aircraftMake", a."aircraftModel", c."highestInjuryLevel", c."totalFatal", c."completionStatus", c.report_url
FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' a JOIN 'https://openairdocs.org/data/latest/ntsb_case_detail.parquet' c ON c."mKey" = a.case_mkey
WHERE a.aircraft_model_code IN ('9600404')
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC

Run it at the DuckDB prompt, or in any tool that reads Parquet over HTTPS. More ways to query the release are on Use the data.

FAA incident reports · 5

Matched to this model through the registry, by N-number and event date.

Accident 20250731011839AWaco UBF · Tampa, FLPilot did a wheell landing and held the tail wheel off the ground until aircraft slowed. Aircraft continued down the runway and a gust of wind from the northwest caused aircraft veer right into the grass and right wing impacted PAPI light.Jul 31, 2025 · N1244G · Substantial damage Incident 20230421004689IWaco UBF · Los Angeles, CAThe pilot stated that he was taxing the aircraft and weaving back and forth for visibility. He then applied the brakes to move back to the left for clearence from a parked aircraft near the taxiway. Too much pressure was applied to the heel brake which caused…Apr 21, 2023 · N13074 · Minor damage Incident 20110901022149IWaco UBF · Owlshead, MEWhile taxiing in on the grass after landing the tubing parted at the lower end of the gear cabane next to the welded axle end. The right wing went down and the lower engine cylinder touched the grass and dug in. The airplane proceeded to go vertical and then…Sep 1, 2011 · N13442 · Minor damage Accident 19910811034509AWaco UBF · Lincoln City, ORTried to take off downwind in rough water. Aborted too late entered area of logs. Wing hit tree prior to stopping.Aug 11, 1991 · N13075 · Substantial damage Accident 19820522046669APiper PA44180 · Chandler, AZAircraft crashed during attempted emergency landing at night on highway. Engine quit due to fuel exhaustion.May 22, 1982 · N2091K · Destroyed

Query with SQL

duckdb -csv -c "SELECT report_number, event_date, event_type, city, state, aircraft_make, aircraft_model, aircraft_damage, fatal_injuries, n_number
  FROM 'https://openairdocs.org/data/latest/faa_incident_report.parquet'
  WHERE aircraft_model_code IN ('9600404')
  ORDER BY event_date DESC, report_number DESC"

Prints the whole list as CSV. It reads the release’s Parquet files over HTTPS, so there’s nothing to download first. Install DuckDB to run it.

SELECT report_number, event_date, event_type, city, state, aircraft_make, aircraft_model, aircraft_damage, fatal_injuries, n_number
FROM 'https://openairdocs.org/data/latest/faa_incident_report.parquet'
WHERE aircraft_model_code IN ('9600404')
ORDER BY event_date DESC, report_number DESC

Run it at the DuckDB prompt, or in any tool that reads Parquet over HTTPS. More ways to query the release are on Use the data.

Service difficulty reports · 2

SDR 2015FA0000569Lock Nut · brokenON REMOVING THE REAR CASE OF THIS ENGINE, FOUND 7 BROKEN .3125 LOCK NUTS. ALSO FOUND 3 BROKEN NUTS ON THE OIL PUMP WHICH IS ATTACHED TO THE REAR CASE. SOME OF THOSE NUTS WERE BROKEN IN 3 SECTIONS. THE ENGINE WAS O/H.Sep 15, 2015 · N13444 · Waco UBF · Engine (Reciprocating)SDR 2015FA0000555Lock Nut · brokenON REMOVING THE REAR CASE OF THIS ENGINE, FOUND Y BROKEN .3125 LOCK NUTS. ALSO FOUND 3 BROKEN NUTS ON THE OIL PUMP WHICH IS ATTACHED TOTHE REAR CASE SOME OF THOSE NUTS WERE BROKEN IN 3 SECTIONS. THE ENGINE WAS O/H.Sep 15, 2015 · N13444 · Waco UBF · Engine (Reciprocating)

Query with SQL

duckdb -csv -c "SELECT sdr_id, difficulty_date, n_number, aircraft_make, aircraft_model, part_name, part_condition, jasc_code, discrepancy
  FROM 'https://openairdocs.org/data/latest/faa_service_difficulty_report.parquet'
  WHERE aircraft_model_key = 'UBF'
  ORDER BY difficulty_date DESC"

Prints the whole list as CSV. It reads the release’s Parquet files over HTTPS, so there’s nothing to download first. Install DuckDB to run it.

SELECT sdr_id, difficulty_date, n_number, aircraft_make, aircraft_model, part_name, part_condition, jasc_code, discrepancy
FROM 'https://openairdocs.org/data/latest/faa_service_difficulty_report.parquet'
WHERE aircraft_model_key = 'UBF'
ORDER BY difficulty_date DESC

Run it at the DuckDB prompt, or in any tool that reads Parquet over HTTPS. More ways to query the release are on Use the data.