# STC ST00278BO

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Pratt & Whitney Engine Services Inc., United States
- Description: Installation of Pratt & Whitney Engine Services Data Transmission Unit (DTU)
- Applied: November 5, 2007
- Status date: September 26, 2008
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21, Part 25
- Data sheets: [TCDS A22CE](https://openairdocs.org/tcds/A22CE)
- Certificate PDF: https://openairdocs.org/files/sha256/cc/f0/ccf0442311ee6b357672f283d5fd21724cebcb0024525aadf5c159249deabce4
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/9C04F3BE2D7A757D862574E40072DC3F.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/ST00278BO

## ADs that name it (0)

None.

## Approved models (2)

- Cessna Aircraft Company 560 ([TCDS A22CE](https://openairdocs.org/tcds/A22CE))
- Cessna Aircraft Company 560XL ([TCDS A22CE](https://openairdocs.org/tcds/A22CE))

## 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.

249 Vanderbilt Avenue Norwood, MA 02062

Part 25 of the Federal Aviation Regulations.

Original Product Type Certificate Number: A22CE Make: Cessna Aircraft Company Model: 560 (Citation Ultra), 560 (Encore) Description of Type Design Change:

Installation of Pratt & Whitney Engine Services Data Transmission Unit (DTU) in accordance with Pratt & Whitney Engine Services Master Document List DTU-T-100-6, Rev D, dated May 29, 2008 or later FAA-approved revision.

Pratt & Whitney Engine Services Installation Instructions DTU-G-010-8 is applicable to this installation.

1. Instructions for Continued Airworthiness (ICA) DTU-G-260-8, Rev A, dated March 6, 2008 or later FAA- accepted revision, shall be made available to the operator at the time of installation.

2. The installer must determine whether this design change is compatible with previously approved modifications.

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.

Date of application : November 5, 2007

Date of issuance : September 26, 2008

( Signature) Robert G. Mann Manager Boston Aircraft Certification Office

( Title)

FAA Form 8110-2-1(10-69) Page 2 of 2

Number ST00278BO

Certification Basis :

Models 560 (Citation Ultra), 560 (Encore) Based on 14 CFR §§ 21.115 and 21.101, the certification basis for the Installation of Pratt & Whitney Engine Services Data Transmission Unit (DTU) in Cessna Aircraft Company Models 560 (Citation Ultra), 560 (Encore) is as referenced on TCDS A22CE, Revision 61, dated December 23, 2005.

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## Every issue (1)

- September 26, 2008: Issued, Current. [certificate](https://openairdocs.org/files/sha256/cc/f0/ccf0442311ee6b357672f283d5fd21724cebcb0024525aadf5c159249deabce4)

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