# STC SA681CE

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: D'Shannon Products Ltd., United States
- Description: Installation:  Wing leading edge fuel tanks 
Data required: Floair Document 141-3.21.1 dated June 23, 1972, and approved Airplane Flight Manual Supplement, Floair Document 141-3.91 dated July 24, 1972.
- Applied: August 27, 1969
- Status date: June 17, 2011
- Product: Aircraft, Single-Engine
- Certification basis: Part 3, Part 21
- Data sheets: [TCDS 3A16](https://openairdocs.org/tcds/3A16)
- Certificate PDF: https://openairdocs.org/files/sha256/0b/c4/0bc4590f72087548f4e2d4cce59754ee4ebc994185e48dd3612ea4f3c3c0fa28
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/8FE764D35D812D8986257926006EEF13.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA681CE

## ADs that name it (0)

None.

## Approved models (1)

- Hawker Beechcraft Corporation D55 ([TCDS 3A16](https://openairdocs.org/tcds/3A16))

## 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.

Part 3 of the Civil Air Regulations.

(See Aircraft Specification No. 3A16 for complete certification basis.)

Original Product--Type Certificate Number: 3A16 Make: Beech Model: D55 Description of Type Design Change: Installation: Wing leading edge fuel tanks Data required: Floair Document 141-3.21.1 dated June 23, 1972, and approved Airplane Flight Manual Supplement, Floair Document 141-3.91 dated July 24, 1972.

1. This approval should not be extended to other aircraft of this model on which other previously approved modifications are incorporated, unless it is determined by the installer that the interrelationship between this change and any of those other previously approved modifications will introduce no adverse effect upon the airworthiness of that aircraft.

2. If the holder agrees to permit another person to use this certificate to alter the product, the holder shall give the other person written evidence of that permissi on, and that written evidence must be maintained in the aircraft’s permanent records.

D’Shannon Products, Ltd.

1309 County Road 134 Buffalo, MN 55313

Date of application : August 27, 1969

Date of issuance : January 8, 1970

Date reissued : April 4, 1978; August 5, 1985;

April 25, 1988; March 15, 2011 June 17, 2011 Date amended : July 24, 1972

By direction of the Administrator Original Signed By:

Timothy Smyth

( Signature) Timothy Smyth Manager, Propulsion Branch Chicago Aircraft Certification Office

(Title)

## Every issue (2)

- June 17, 2011: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/0b/c4/0bc4590f72087548f4e2d4cce59754ee4ebc994185e48dd3612ea4f3c3c0fa28)
- March 15, 2011: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/04/f7/04f73f26bebd7f259358ef84e0cf4613e1efe48216f9444c2bfe05fe8c407a73)

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