# STC SA01815CH

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Baumann Floats LLC, United States
- Description: Installation of Baumann Model BF2550A floats.  For models 172I through 172P, a gross weight of 2350 lbs. at a center of gravity range of plus 39.5 inches to plus 45.5 inches is approved.  For models R172K and R172K with STCs SA1436CE and SA1437CE, the maximum gross weight is limited to 2550 lbs. at a center og gravity range of plus 39.5 inches to plus 45.5 inches.
- Applied: February 12, 2003
- Status date: May 25, 2022
- Product: Aircraft, Single-Engine
- Certification basis: Part 23
- Data sheets: [TCDS 3A12](https://openairdocs.org/tcds/3A12), [TCDS 3A17](https://openairdocs.org/tcds/3A17)
- Certificate PDF: https://openairdocs.org/files/sha256/26/cf/26cfff11b59a22e581b89752bddf5103f554b6b8910935e167e0ca39c220371b
- Approved model list and other attachments: [SA01815CH_AML.pdf](https://openairdocs.org/files/sha256/79/c8/79c817269d4fe90ba9bae4371aabea77a2b0542b0310b784ae0f92ee9332c336)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID183093848720230331170539.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA01815CH

## ADs that name it (0)

None.

## Approved models (20)

- The Cessna Aircraft Company 172A ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- The Cessna Aircraft Company 172B ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- The Cessna Aircraft Company 172C ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- The Cessna Aircraft Company 172D ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- The Cessna Aircraft Company 172E ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- The Cessna Aircraft Company 172F ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- The Cessna Aircraft Company 172G ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- The Cessna Aircraft Company 172H ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- The Cessna Aircraft Company 172I ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- The Cessna Aircraft Company 172K ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- The Cessna Aircraft Company 172L ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- The Cessna Aircraft Company 172M ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- The Cessna Aircraft Company 172N ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- The Cessna Aircraft Company 172P ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- The Cessna Aircraft Company 172Q ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- The Cessna Aircraft Company 172R ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- The Cessna Aircraft Company 172S ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- The Cessna Aircraft Company 175 ([TCDS 3A17](https://openairdocs.org/tcds/3A17))
- The Cessna Aircraft Company 175A ([TCDS 3A17](https://openairdocs.org/tcds/3A17))
- The Cessna Aircraft Company R172K ([TCDS 3A17](https://openairdocs.org/tcds/3A17))

## 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.

FAA FORM 8110-2(10-68) PAGE 1 of 4 PAGES Number SA01815CH Reissued on 05/25/22 to supersede the original STC, which has been lost or misplaced.

This certificate issued to Part * of the * Regulations.* Original Product--Type Certificate Number :

I nstallation of Baumann Model BF2550A Floats and McCauley Propeller Models 1A200DFA 82/42 and 1A200WFA 82/42 in accordance with the data listed on FAA AML Number SA01815CH, or later FAA approved revision.

1. Compatibility of this design change with previously approved modifications must be determined by the installer.

2. F or Models 172I through 172P, a gross weight of 2350 lbs. at a center of gravity range of +39.5 inches to 45.5 i nches is approved.

3. F or Model R172K and R172K modified with Supplemental Type Certificates (STC’s) Numbers SA1436CE and S A1437CE, the maximum gross weight is limited to 2550 lbs. at a center of gravity range of +39.5 inches to +45.5 i nches, Normal Category.

Baumann Floats, LLC 255 West 35th Avenue Oshkosh, WI 54902 *See attached FAA Approved Model List (AML) No.

SA01815CH for list of approved airplane models and applicable airworthiness regulations Make:

* * Date of application: February 12, 2003 Date of issuance : April 28, 2003 Date reissued : June 11, 2003; January 10, 2005;

May 25, 2022 Date amended : September 3, 2004 By direction of the Administrator _

(Signature) Monica L. Nemecek Manager, Airframe and Administrative Services Section Chicago ACO Branch

(Title)

Transfer the ownership of Supplemental Type Certificate Number

to (Name of transferee)

(Address of transferee) (Number and street)

(City, State, and ZIP code)

from (Name of grantor) (Print of type)

(Address of grantor) (Number and street)

(City, State, and ZIP code)

Signature of grantor (In ink):

FAA FORM 8110-2-1(10-69) PAGE 3 of 4 PAGES

Number SA01815CH Date Reissued: May 25, 2022

4. For Model 172R equipped with McCauley 1A200/WFA propeller, a gross weight of 2350 lbs. at a center of gravity range of +39.5 inches to +45.5 inches is approved.

5. For Models 172I through 172L modified with a Lycoming O-360 series engine in accordance with Supplemental Type Certificates (STC’s) Numbers SA332GL, SA703GL, SA4428SW, SA2196CE, SA420CE, SA647CE, SA807CE or SA00461SE a gross weight of 2500 lbs. at a center of gravity range of +39.5 inches to +45.5 inches is approved. See listed STC’s for model applicability. Fixed pitch propeller installations require the installation of a McCauley 1A200/DFA.

6. For Models 172M through 172P modified with a Lycoming O-360 series engine in accordance with STC’s Numbers SA332GL, SA703GL, SA4428SW, SA2196CE, SA420CE, SA647CE, SA807CE or SA00461SE, gross weight of 2550 lbs. at a center of installations require the installation of a McCauley 1A200/DFA.

7. For Model 172Q equipped with McCauley 1A200/DFA propeller, a gross weight of 2550 lbs. at a center of gravity range of +39.5 inches to +45.5 inches is approved.

8. For Model 172S equipped with McCauley 1A200/WFA propeller, a gross weight of 2550 lbs. at a center of gravity range of +39.5 inches to +45.5 inches is approved.

9. For Model 175 and 175A modified with Franklin 6A-350-C1 or 6A-350-C2 engines in accordance with STC Number SA293NW, a gross weight of 2350 lbs. (for 175) and 2450 lbs. (for 175A) at a center of gravity range of +39.5 inches to +45.5 inches, Normal Category, is approved. See listed STC’s for model applicability and approved propellers.

10. For Models 175 and 175A modified with Lycoming O-360 series engine in accordance with STC Number SA00461SE, a gross weight of 2500 lbs. at a center of gravity range of +39.5 inches to +45.5 inches, Normal Category, is approved. See listed STC’s for model applicability and approved propellers. Fixed pitch propeller installations require the installation of a McCauley 1A200/DFA.

11. For Models 172D through 172P modified with Franklin 6A-350-C1 or 6A-350-C2 engines in accordance with STC Number SA340NW, a gross weight of 2499 lbs. at a center of gravity of +41.0 inches to +47.3 inches, Normal Category, is approved.

See listed STC’s for model applicability and approved propellers.

12. For Models 172A through 172H modified with Lycoming 0-360-A1A engine in accordance with STC number SA807CE, gross weights of 2200 lbs. (for 172A, 172B), 2250 lbs. (for 172C) or 2300 lbs. (for 172D through 172H), Normal Category, is approved. See listed STC for model applicability, center of gravity ranges and approved propellers.

13. For Models 172A through 172H modified with Lycoming 0-360 series engine in accordance with STC number SA00461SE, a gross weight of 2200 lbs. (172A) or 2500 lbs. (for 172B through 172H), Normal Category, is approved. See listed STC for model applicability, center of gravity ranges and approved propellers. Fixed pitch propeller installations require the installation of a McCauley 1A200/DFA.

14. For Models 172B through 172H modified with Lycoming 0-360 series engine in accordance with STC number SA4428SW, seaplane gross weights and center of gravity limits in accordance with Type Certificate Data Sheet (TCDS) 3A12 remains applicable. Fixed pitch propeller installations require the installation of a McCauley 1A200/DFA.

_ FAA FORM 8110-2-1(10-69) PAGE 4 of 4 PAGES Number SA01815CH D ated Reissued: May 25, 2022 Limitations and Conditions (Continued):

15. For Models 172E through 172P modified with a Lycoming 0-360 series engine in accordance with STC number SA564NE, a gross weight of 2500 lbs. (for airplane serial numbers 17256513 through 17259903) or 2550 lbs. (for airplane serial numbers 17259904 through 1726673) is approved. See listed STC for model applicability, center of gravity ranges and approved propellers. Fixed pitch propeller installations require the installation of a McCauley 1A200/DFA.

16. Mc Cauley Fixed Pitch Propeller Models 1A200DFA 82/42 and 1A200WFA 82/42 are to be installed in accordance with BF - 2550-A-002 Revision None, dated 08/30/04, or later FAA approved revision.

17. T he Baumann Floats, LLC. Pilot’s Operating Handbook Supplement, FAA Approved on August 17, 2004, or later FAA Approved Revisions, is required with this modification.

18. A copy of this certificate and the FAA Approved Model List (AML) No. SA01815CH, amended August 17, 2004, or later FAA approved revisions, must be maintained as part of the permanent records for the modified aircraft.

19. A ll models listed on AML No. SA01815CH must have been previously modified with FAA approved floatplane structural provisions compatible with the installation of the Baumann Model BF2550A floats. These provisions, which provide fuselage attach points for the floats and increased airframe strength, can be provided by the holder of the applicable Type Certificates or by another party.

20. I f the installer agrees to permit another person to use this certificate to alter the product, the holder shall give the other person written evidence of that permission.

...E ND...

### SA01815CH_AML.pdf

**FAA APPROVED MODEL LIST (AML) NO. SA01815CH**

BAUMANN FLOATS, LLC INSTALLATION OF MODEL BF2550A FLOATS Issue Date: April 28, 2003

**ORIGINAL TYPE DESIGN**

**DATA AFM AML**

**ITEM AIRCRAFT**

**MAKE AIRCRAFT MODEL**

**CERTIFICATE NUMBER**

**CERTIFICATION BASIS FOR**

**ALTERATION**

**SUPPLEM ENT**

**NUMBER/ DATE**

AMENDMENT DATE 1 2 Cessna Cessna 172A, 172B, 172C, 172D, 172E, 172F, 172G, 172H, 172I, 172K, 172L, 172M, 172N, 172P, 172Q, 172R, 172S 175, 175A, R172K 3A12 3A17 CAR 3 or 14 CFR 23 and amendments listed in TCDS 3A12 CAR 3 and amendments listed in TCDS

3A17 Drawing List BF-2550A-01, Rev.

None, dated 2/12/03 Drawing List BF-2550A -01, Rev.

None, dated 2/12/03 Baumann Pilot’s Operating Handbook Supplement dtd 2/25/03 Baumann Pilot’s Operating

Handbook Supplement dtd 2/25/03 FAA Approved: ___________________________________________________ Monica L. Nemecek Manager, Airframe & Administrative Services Section Chicago ACO Branch Page 1 of 1

## Every issue (1)

- May 25, 2022: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/26/cf/26cfff11b59a22e581b89752bddf5103f554b6b8910935e167e0ca39c220371b), [SA01815CH_AML.pdf](https://openairdocs.org/files/sha256/79/c8/79c817269d4fe90ba9bae4371aabea77a2b0542b0310b784ae0f92ee9332c336)

---
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.