# STC SA594AL

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Aircraft Innovations, LLC, United States
- Description: Installation of Day & Night, Inc. extended flaps and modified ailerons and flap control system on a Piper Model PA-14 airplane
- Applied: April 19, 1979
- Status date: September 11, 2009
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 3, Part 21
- Data sheets: [TCDS A-797](https://openairdocs.org/tcds/A-797)
- Certificate PDF: https://openairdocs.org/files/sha256/96/92/9692fa6692b860bff0a997c00caf55a183b7f766d6362f1d2a71f25a2042f421
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/AA932BFC320657B4862576390068D8F4.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA594AL

## ADs that name it (0)

None.

## Approved models (1)

- FS 2002 Corp. PA-14 ([TCDS A-797](https://openairdocs.org/tcds/A-797))

## What the certificate says

Read from the PDF's text layer, without the form's printed wording; the layout is lost and the order can differ. The PDF is the record.

This certificate issued to Aircraft Innovations, LLC PO Box 110164 Anchorage, AK 99511

Part 3 of the Civil Air Regulations.

Original Product — Type Certificate Number: 797 Make: Piper Model: PA-14

Description of Type Design Change: Installation of Day & Night, Inc. extended flaps and modified ailerons and flap control system on a Piper Model PA-14 airplane in accordance with drawings, sketches, and instructions on file in AAL-210, Engineering and Manufacturing Field Office, FAA Alaskan Region.

1. Data pertaining to this modification are considered inadequate for duplication in other aircraft. This approval is limited to the installation of Day & Night, Inc. extended flaps and modified ailerons and flap control system on a Piper Model PA-14 airplane, R/N 4214H, S/N 14-101 only.

2. FAA Approved Airplane Flight Manual Supplement dated August 4, 1976 is required.

3. This installation must be installed in conjunction with Day & Night, Inc. STC’s No. SA411AL (square wing-tip installation) and SA593AL (square tail installation).

Date of application: December 3, 1975 Date reissued : April 19, 1979; September 11, 2009

Date of issuance: August 4, 1976 Date amended: September 11, 2009

( Signature) David D. Swartz Acting Manager, Anchorage Aircraft Certification Office

( Title)

## Every issue (1)

- September 11, 2009: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/96/92/9692fa6692b860bff0a997c00caf55a183b7f766d6362f1d2a71f25a2042f421)

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