# N703K: Waco BSO

- Status: Valid registration
- Airframe: [Waco BSO](https://openairdocs.org/model/waco-bso) (registry code 9601204, 3 seats)
- Data sheets: [TCDS ATC 168](https://openairdocs.org/tcds/ATC%20168) (The Waco Aircraft Company) (OpenAirDocs)
- Serial number: A-163
- Type: Fixed wing single engine
- Engine type: Reciprocating
- Certificate issued: January 29, 2019
- Expires: January 31, 2029
- Mode S code: A96094
- Registered owner: [Hirtle Alan L](https://openairdocs.org/faa-owner/HIRTLE%20ALAN%20L)
- Location: [Oro Valley, AZ](https://openairdocs.org/faa-place/AZ/Oro%20Valley)
- Owner type: Individual
- Owner's area on the map: 32.4684° N, 110.9815° W: Placed by OpenAirDocs at the center of ZIP code 85755, within about 3 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=703K
- Page: https://openairdocs.org/aircraft/N703K

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.

## ADs that may apply (OpenAirDocs): 0 in force

### Matched by airframe (Waco BSO)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N703K.

## FAA accident and incident reports

None matched to N703K.

## 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.

## Service difficulty reports on N703K not matched to an aircraft (1)

They name N703K, but no registry record covers the date, the aircraft registered then was built later, or the report describes another aircraft.

- [SDR 2DYA2023072000232](https://openairdocs.org/sdr/2DYA2023072000232), Jul 20, 2023: ELECTRICAL SYS. UNKNOWN. EMERGENCY LIGHT IN THE ROW 1,4,7 LEFT SIDE, MID GALLEY AND ROWS 16,17,20,21,29 RIGHT SIDE AND EXTERIOR EMERGENCY LIGHTS AT DOOR R3 AND R4 DONT TURN ON

## STCs that may be installed (OpenAirDocs) (11)

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 BSO)

- [STC SA04652CH](https://openairdocs.org/stc/SA04652CH): To allow use of 100R grade aviation fuel meeting Swift Fuel, LLC specification. Swift Fuels LLC
- [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 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

## Related

- Other Waco BSO aircraft: https://openairdocs.org/model/waco-bso/aircraft.md

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