# STC SA01558CH-D

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: Landmark Aviation, United States
- Description: Installation of an Innovative Solutions & Support Air Data Computer.
- Applied: March 20, 2002
- Status date: June 5, 2007
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21, Part 23
- Data sheets: [TCDS A27CE](https://openairdocs.org/tcds/A27CE)
- Certificate PDF: https://openairdocs.org/files/sha256/b3/94/b394405f762a42c09bce7fb5c7069793b701fb6fd6e2d906c20cd560fbd5ae86
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FB280F76D7CBA94F8625730800494A86.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA01558CH-D

## ADs that name it (0)

None.

## Approved models (2)

- Cessna Aircraft Company 501 ([TCDS A27CE](https://openairdocs.org/tcds/A27CE))
- Cessna Aircraft Company 551 ([TCDS A27CE](https://openairdocs.org/tcds/A27CE))

## 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 23 of the Federal Aviation Regulations.

See Type Certificate Data Sheet A27CE as amended by Special Condition No. 25-199-SC, dated April 17, 2002, Docket No. NM216 for complete certification.

Installation of a Innovative Solutions & Support Air Data Computer. Installed per ElectroSonics Top Drawing ES551-120028-01, Rev (F), dated June 05, 2007 or later FAA approved revision.

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

2. FAA Approved Flight Manual Supplement, ElectroSonics document ES551-120028-100, Rev. IR, dated May 03, 2002 or later FAA Approved revision for Option 1 & 2, FAA Approved Flight Manual Supplement, ElectroSonics document number ES551- 120028-101, Rev. IR, dated May 03, 2002 or later FAA Approved revision for Option 3 & 4, Flight Manual Supplement, Landmark Aviation document number 1012945, Rev. A dated June 05, 2007 or later FAA Approved revision for Option 5 is a required part of this STC.

3. Airworthiness Limitations requirements specified in ElectroSonics document ES551-120028-200, Revision IR, dated April 25, 2002 or later FAA Approved revision, must be complied with in addition to the basic airplane maintenance manuals.

4. 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 permission.

Landmark Aviation 1200 North Airport Drive Springfield, IL 62707 A27CE Make: Cessna Aircraft Company Model: Cessna 501/551

Date of application : March 20, 2002

Date of issuance: May 3, 2002 Date reissued : June 05, 2002 January 19, 2007

Date amended : June, 05, 2007

( Signature) Tim Winiesdorffer, DAS Administrator Landmark Aviation, Springfield, IL FAA DAS-100079-CE

( 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 or type)

(Address of grantor)

(Number and street)

(City, State, and Zip code)

Signature of grantor (In ink):

## Every issue (2)

- June 5, 2007: Amended, Current. [certificate](https://openairdocs.org/files/sha256/b3/94/b394405f762a42c09bce7fb5c7069793b701fb6fd6e2d906c20cd560fbd5ae86)
- January 19, 2007: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/68/dc/68dc5088a7c74909708eb84ee71560aaaa6bd699472d37ecc3c7e0134a08569c)

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