# N4W: Waco ASO - Status: Valid registration - Airframe: [Waco ASO](https://openairdocs.org/model/waco-aso) (registry code 9601202, 3 seats) - Engine: [Continental R670-SERIES series](https://openairdocs.org/engine/continental-r670-series-series) (registry code 17016) - Data sheets: [TCDS ATC 41](https://openairdocs.org/tcds/ATC%2041) (The Waco Aircraft Company) (OpenAirDocs) - Serial number: X3101 - Type: Fixed wing single engine - Engine type: Reciprocating - Airworthiness: Standard, normal, utility - Airworthiness date: August 9, 1966 - Certificate issued: June 6, 2018 - Expires: June 30, 2028 - Mode S code: A4A9E3 - Registered owner: [Kreiter Kevin B](https://openairdocs.org/faa-owner/KREITER%20KEVIN%20B) - Location: [Camas, WA](https://openairdocs.org/faa-place/WA/Camas) - Owner type: Individual - Owner's area on the map: 45.6425° N, 122.3795° W: Placed by OpenAirDocs at the center of ZIP code 98607, within about 4 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based - FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=4W - Page: https://openairdocs.org/aircraft/N4W From the FAA registry file of October 24, 2026. ADs below are matched by the registry's airframe and engine model codes. They may apply; each AD's applicability can narrow it by serial number, part number or installed equipment. This is not a compliance determination. The registry lists only the engine series, so ADs for every Continental R670-SERIES model are included. ## ADs that may apply (OpenAirDocs): 1 in force ### Matched by airframe (Waco ASO) None in force. ### Matched by engine (Continental R670-SERIES series) - [AD 95-21-15](https://openairdocs.org/ad/95-21-15): Aviation Gasoline · Continental Motors A-65-8, C85-12F, C85-12FJ and 77 more. Effective Nov 28, 1995 ### Historical (superseded or no longer in force) - [AD 94-14-12](https://openairdocs.org/ad/94-14-12) (historical): Octane Aviation Gasoline · Teledyne Continental Motors A-65-8, C85-12, E185-11 and 68 more ## Information bulletins (advisory) None matched. ## NTSB investigations (1) From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. - [NTSB LAX91LA256](https://openairdocs.org/ntsb/LAX91LA256), Jun 9, 1991: Weaver WACO-ASO (N4W), Montague, CA, substantial damage. Probable cause: FAILURE OF THE PILOT TO MAINTAIN DIRECTIONAL CONTROL OF THE AIRPLANE AND IMPROPER USE OF THE BRAKES. ## FAA accident and incident reports (1) From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. - [Accident 19910609020489A](https://openairdocs.org/incident/19910609020489A), Jun 9, 1991: Waco ASO (N4W), Montague, CA, Substantial damage. Tail wheel vibrated. Lost directional control. Right main clogged with grass leaving runway. Nosed over. ## Service difficulty reports None filed for this aircraft. Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model. ## STCs that may be installed (OpenAirDocs) (16) Approved for this aircraft's airframe or engine model, in force first, then newest. The registry doesn't record which STCs an aircraft has; its records do. ### Approved for the airframe (Waco ASO) - [STC SA04652CH](https://openairdocs.org/stc/SA04652CH): To allow use of 100R grade aviation fuel meeting Swift Fuel, LLC specification. Swift Fuels LLC - [STC SA4503NM](https://openairdocs.org/stc/SA4503NM): Remove original cloth covering and install Ceconite covering. Ceconite Division of Poly-Fiber Inc - [STC SA01406NY](https://openairdocs.org/stc/SA01406NY): Installation of Airwolf remote mounted engine oil filter kit AFC-K017 on single and multi-engine fixed light aircraft and rotary wing. Airwolf Filter Corporation - [STC SA00478CH](https://openairdocs.org/stc/SA00478CH): Installation of Cooper Superflite 102 Fabric. Aviation Products Systems Inc - [STC SA2693NM](https://openairdocs.org/stc/SA2693NM): Installation of Electronics International digital volt/amp gauges and accessories. Electronics International Inc - [STC SA02033AT](https://openairdocs.org/stc/SA02033AT): Modification to install an air-oil separator to prevent oil from being aspirated from the engine breather line. M-20 Oil Separators LLC - [STC SA2687NM](https://openairdocs.org/stc/SA2687NM): Installation of Truboplus/ Electronics Int'l gauges and switches. Aero Manufacturing Inc - [STC SA1626NM PAGE 2](https://openairdocs.org/stc/SA1626NM%20PAGE%202): Installation of Electronics Int'l Digital EGT/CHT Instruments and accessories. (201 Series). Electronics International - [STC SA2350NM PAGE 2](https://openairdocs.org/stc/SA2350NM%20PAGE%202): Installation of Electronics International Inc digital carburetor/outside air temperature gauges. Electronics International - [STC SA4302NM](https://openairdocs.org/stc/SA4302NM): Installation of Electronics Int'l digital automatic engine analyzer. Electronics International - [STC SA3862NM PAGE 2](https://openairdocs.org/stc/SA3862NM%20PAGE%202): Installation of Electronics International Primary TIT/EGT/CHT instruments, remote switches and associated accessories. Electronics International - [STC SA2190NM PAGE 2](https://openairdocs.org/stc/SA2190NM%20PAGE%202): Installation of electronics International Digital Volt/Amp Gauges and Accessories. Electronics International - [STC SA2350NM](https://openairdocs.org/stc/SA2350NM) (historical): Installation of Electronics International Inc digital carburetor/outside air temperature gauges listed on the attached continuation sheet and the associated accessories. Electronics International ### Approved for the engine (Continental R670-SERIES series) - [STC SE04651CH](https://openairdocs.org/stc/SE04651CH): To allow use of l00R grade aviation fuel meeting Swift Fuel, LLC specification SPEC-l00R-22. Swift Fuels LLC. Lists R-670-B - [STC SA4005NM](https://openairdocs.org/stc/SA4005NM): Precise Flight Inc. Pulselite Control System. Precise Flight Inc. Lists R-670-B - [STC SE5879SW](https://openairdocs.org/stc/SE5879SW): Use of Phillips X/C II 20W-50 and25W-60 oil (OSS 55875) in all Avco reciprocating aircraft engines from 65 to 450 BHP. Phillips Petroleum Co ## Earlier aircraft with N4W The FAA can reassign an N-number once a registration is cancelled. These aircraft carried N4W before. - [Cancelled 1970-07-07](https://openairdocs.org/deregistered/N4W-1970-07-07): Bleriot 11, S/N 2S, built 1955. Owner: [Weeks E D](https://openairdocs.org/faa-owner/WEEKS%20E%20D), [Des Moines, IA](https://openairdocs.org/faa-place/IA/Des%20Moines) - [Cancelled 1930-12-26](https://openairdocs.org/deregistered/N4W-1930-12-26): Griffin James Howard GRIFFIN SPECIAL, S/N 4997. Owner: [Griffin W F](https://openairdocs.org/faa-owner/GRIFFIN%20W%20F), [Berea, OH](https://openairdocs.org/faa-place/OH/Berea) ## Related - Other Waco ASO aircraft: https://openairdocs.org/model/waco-aso/aircraft.md - The Continental R670-SERIES series engine: https://openairdocs.org/engine/continental-r670-series-series.md --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.