# STC SA01379WI

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Cheyenne Tech, United States
- Description: Installation of Dual Digital Altimeters and associated equipment to obtain Reduced Vertical Separation Minimum
(RVSM) Airworthiness approval.
- Applied: February 22, 2005
- Status date: October 31, 2024
- Product: Aircraft, Small Airplane
- Certification basis: Part 23
- Data sheets: [TCDS A23SO](https://openairdocs.org/tcds/A23SO)
- Certificate PDF: https://openairdocs.org/files/sha256/d4/c9/d4c94d7f073b437c9fce61030cd6400b581efe9c51b7000f11379ccf6d136907
- Approved model list and other attachments: [SA01379WI_AML.pdf](https://openairdocs.org/files/sha256/73/0c/730c21bb080962dd24ff5e18a89e2235e9d918e1230775fe9330e8bfb27da46c)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID165062976120241120151455.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA01379WI

## ADs that name it (0)

None.

## Approved models (3)

- Piper Aircraft Inc. PA-42 ([TCDS A23SO](https://openairdocs.org/tcds/A23SO))
- Piper Aircraft Inc. PA-42-1000 ([TCDS A23SO](https://openairdocs.org/tcds/A23SO))
- Piper Aircraft Inc. PA-42-720 ([TCDS A23SO](https://openairdocs.org/tcds/A23SO))

## 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.

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Original Product 7\SH&HUWLILFDWH1XPEHU Make:

SA01379WI Cheyenne Tech 5111 Newbury Way Columbia, MO 65203-8489 Part 23 Federal Aviation Regulations A23SO See the attached FAA AML SA01379WI for all approved makes, models, and required data.

Installation of Dual Digital Altimeters and associated equipment to obtain Reduced Vertical Separation Minimum (RVSM) Airworthiness approval. See the attached FAA Approved Model List (AML) SA01379WI for all required data.

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

2. The modified aircraft must be operated in accordance with the applicable AFMS.

February 22, 2005 3/7/2006, 10/31/2024 March 2, 2006 8/16/2007 for Paul Nguyen Manager, Central Certification Branch Compliance & Airworthiness Division Aircraft Certification Service 2

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Date oI transfer:

SA01379WI 2

### SA01379WI_AML.pdf

FAA Approved Model List (AML) NO. SA01379WI

**CHEYENNE TECH**

Installation of Dual Digital Altimeters and associated equipment to obtain Reduced Vertical Separation Minimum (RVSM) Airworthiness Approval Page 1 of 3

Original Issue Date: March 2, 2006 Item Aircraft Make Aircraft Model S/N Range TCDS Certification Basis MDL No. *Revision / Date AFMS No. *Revision / Date AML Amendment Date

1. Piper PA-42-1000 (Cheyenne 400LS) 42-5527003 thru 42-5527044 A23SO 14 CFR Part 23, as listed in the TCDS MDL8000-34254 Revision R, dated 9/16/2008 FMS8000-34254, Revision OR, dated 3/2/2006 8/16/2007

2. Piper PA-42-1000 (Cheyenne 400LS) 42-5527003 thru 42-5527044 A23SO 14 CFR Part 23, as listed in the TCDS MDL8000-34254 Revision R, dated 9/16/2008 FMS8000-34254-1, Revision OR, dated 7/11/07 8/16/2007

3. Piper PA-42-720 (Cheyenne IIIA) 42-8301001, 42-8301002, 42-5501003 thru 42-5501060 (except 42-5501024, 42-5501028, 42-5501032, 42-5501034 thru 42-5501038 A23SO 14 CFR Part 23, as listed in the TCDS MDL8000-34254 Revision R, dated 9/16/2008 FMS8000-34254, Revision OR, dated 3/2/2006 8/16/2007 * or later FAA Approved revision

FAA Approved Model List (AML) NO. SA01379WI

**CHEYENNE TECH**

Installation of Dual Digital Altimeters and associated equipment to obtain Reduced Vertical Separation Minimum (RVSM) Airworthiness Approval Page 2 of 3

Item Aircraft Make Aircraft Model S/N Range TCDS Certification Basis MDL No.

*Revision / Date AFMS No.

*Revision / Date AML Amendment Date

4. Piper PA-42-720 (Cheyenne IIIA)

42-8301001, 42-8301002, 42-5501003 thru 42-5501060 (except 42-5201024, 42-5501028, 42-5501032, 42-5501034 thru 42-5501038 A23SO 14 CFR Part 23, as listed in the TCDS MDL8000-34254 Revision R, dated 9/16/2008 FMS8000-34254-1, Revision OR, dated 7/11/07 8/16/2007

5. Piper PA-42-720 (Cheyenne IIIA)

42-8301001, 42-8301002, 42-5501003 thru 42-5501060 (except 42-5201024, 42-5501028, 42-5501032, 42-5501034 thru 42-5501038 A23SO 14 CFR Part 23, as listed in the TCDS MDL8000-34254 Revision R, dated 9/16/2008.

FMS8000-34254-2, Revision OR, dated 11/12/08 11/12/2008

6. Piper PA-42-1000 (Cheyenne 400LS) 42-5527003 thru 42-5527044 A23SO 14 CFR Part 23, as listed in the TCDS MDL8000-34254 Revision S, dated 8/15/2011 FMS8000-34254-4, Revision OR, dated 9/7/2011 9/7/2011 * or later FAA Approved revision

FAA Approved Model List (AML) NO. SA01379WI

**CHEYENNE TECH**

Installation of Dual Digital Altimeters and associated equipment to obtain Reduced Vertical Separation Minimum (RVSM) Airworthiness Approval Page 3 of 3

Item Aircraft Make Aircraft Model S/N Range TCDS Certification Basis MDL No.

*Revision / Date AFMS No.

*Revision / Date AML Amendment Date

7. Piper PA-42-720 (Cheyenne IIIA) 42-8301001, 42-8301002, 42-5501003 thru 42-5501060 (except 42-5501024, 42-5501028, 42-5501032, 42-5501034 thru 42-5501038 A23SO 14 CFR Part 23, as listed in the TCDS MDL8000-34254 Revision S, dated 8/15/2011 FMS8000-34254-4, Revision OR, dated 9/7/2011 9/7/2011

8. Piper PA-42 (Cheyenne III 42-7800001 thru 42-8001106 A23SO 14 CFR Part 23, as listed in the TCDS MDL8000-34254 Revision S, dated 8/15/2011 FMS8000-34254-4, Revision OR, dated 9/7/2011 9/7/2011 * or later FAA Approved revision

FAA Approved:

for Paul Nguyen Manager, Central Certification Branch Compliance & Airworthiness Division Aircraft Certification Service Date reissued: 10/31/2024

## Every issue (4)

- October 31, 2024: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/d4/c9/d4c94d7f073b437c9fce61030cd6400b581efe9c51b7000f11379ccf6d136907), [SA01379WI_AML.pdf](https://openairdocs.org/files/sha256/73/0c/730c21bb080962dd24ff5e18a89e2235e9d918e1230775fe9330e8bfb27da46c)
- September 7, 2011: Amended, Historical. [certificate](https://openairdocs.org/files/sha256/35/47/3547cbf35319e332ddd274e23374f7c047d68d34c4da481fbaab875bbf822249), [SA01379WI AML.pdf](https://openairdocs.org/files/sha256/43/fd/43fda0b2ffa4f851d0c1ceea269ceb6eaf4f2812c7afd03c2c17ea3c7ef84031)
- August 16, 2007: Amended, Historical. [certificate](https://openairdocs.org/files/sha256/35/47/3547cbf35319e332ddd274e23374f7c047d68d34c4da481fbaab875bbf822249), [SA01379WI_AML.pdf](https://openairdocs.org/files/sha256/cc/26/cc26d3912884ff43c606842e0a732555f01908a9cf17a4b911894053530a98de)
- March 7, 2006: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/89/17/891714c6167ad3bc01fb0be48b170bc6e0e1b7ece5e636dd74d570a7bd441bea)

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