# N1571L: Waco ZQC-6

- Status: Valid registration
- Airframe: [Waco ZQC-6](https://openairdocs.org/model/waco-zqc-6) (registry code 9600648, 5 seats)
- Data sheets: [TCDS TC 598](https://openairdocs.org/tcds/TC%20598) (The Waco Aircraft Company) (OpenAirDocs)
- Serial number: 4388
- Type: Fixed wing single engine
- Engine type: Reciprocating
- Certificate issued: August 22, 1990
- Expires: January 31, 2028
- Mode S code: A0E6B6
- Registered owner: [Howker John A](https://openairdocs.org/faa-owner/HOWKER%20JOHN%20A)
- Location: [Louisville, KY](https://openairdocs.org/faa-place/KY/Louisville)
- Owner type: Individual
- Owner's area on the map: 38.1517° N, 85.5172° W: Placed by OpenAirDocs at the center of ZIP code 40299, 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=1571L
- Page: https://openairdocs.org/aircraft/N1571L

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 ZQC-6)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N1571L.

## FAA accident and incident reports

None matched to N1571L.

## 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) (5)

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 ZQC-6)

- [STC SA04652CH](https://openairdocs.org/stc/SA04652CH): To allow use of 100R grade aviation fuel meeting Swift Fuel, LLC specification. Swift Fuels LLC
- [STC SA01757WI](https://openairdocs.org/stc/SA01757WI): To allow the use of UL91 or UL94 (minimum) grade aviation fuel. Swift Fuels LLC
- [STC SA01831WI](https://openairdocs.org/stc/SA01831WI): To allow the use of UL91 (minimum) grade aviation fuel. Petersen Aviation 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 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

## Related

- Other Waco ZQC-6 aircraft: https://openairdocs.org/model/waco-zqc-6/aircraft.md

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