# STC SR11945MC

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: The Boeing Company, United States
- Description: Modify AW139 to expand the flight envelope for 7040 kg maximum gross weight and enable CAT II ILS capability, including cockpit software upgrade
- Applied: September 18, 2020
- Status date: April 17, 2025
- Product: Aircraft, Rotorcraft
- Certification basis: Part 29
- Data sheets: [TCDS R00002RD](https://openairdocs.org/tcds/R00002RD)
- Certificate PDF: https://openairdocs.org/files/sha256/96/c1/96c183a73a20bda04e59bfb1a9fc6a0a1cbea1804341a3784706d2eb5bfadec5
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID145808443320250423204241.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SR11945MC

## ADs that name it (0)

None.

## Approved models (1)

- Leonardo S.p.a. AW139 ([TCDS R00002RD](https://openairdocs.org/tcds/R00002RD))

## 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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55' /HRQDUGR6SD $: Description of Type Design Change:

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6HSWHPEHU SR11945MC The Boeing Company 300 Industrial Highway Ridley Park, PA. 19078 Part 29 Federal Aviation Regulations April 17, 2025 Trenton Shepherd, Manager Military Certification Branch, AIR-780 4

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Too (Name and address of transferee):

Date oI transfer:

7KH%RHLQJ&RPSDQ\ ,QGXVWULDO+LJKZD\ 5LGOH\3DUN3$ SR11945MC 4

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nited States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SR11945MC Limitations and Conditions (Continued from Page 1):

1. This STC is only applicable to aircraft serial numbers 41801 to 41999.

2. The following must be installed as a prerequisite to this STC:

- STC SR00207MC

- AW139 Basic Rotorcraft Flight Manual 139G0290X002 Rev. 30 or later FAA approved revision

- AW139 with the following Leonardo S.p.a. TC Kits:

• 4G7100F00111 Rev A or later approved revision

• 4G7100F00211 Rev A or later approved revision

• 4G6320F00411 Rev A or later approved revision

- Two (2) PT6C-67C1 engines installed to the aircraft -or- Pratt & Whitney Canada Service Bulletin 41120 Rev 2 or later approved revision

- For aircraft serial numbers 41801 to 41806 the following additional Leonardo S.p.a. Service Bulletins (SBs) are required to be complied with:

• SB139-709 Rev A or later approved revision – Service Bulletin: "Second" VNE Placard structural provisions removal

• SB139-726 Rev A or later approved revision – Service Bulletin: MAU Re-identification

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

4. This design approval is limited to government/military use only.

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1. As defined in Type Certificate Data Sheet No. R00002RD.

2. Compliance to later amendment levels has been found to the following regulations:

14 CFR Part 29.25 [29-51] 14 CFR Part 29.143 [29-51] 14 CFR Part 29.173 [29-51] 14 CFR Part 29.175 [29-51] 14 CFR Part 29.177 [29-51] 14 CFR Part 29.773 [29-57] 14 CFR Part 29.1316 [29-53] 14 CFR Part 29.1317 [29-49] Special Condition No. 29-056-SC 14 CFR Part 29.1305 ELOS (ASW-111_2004-12-20_29.1305) Means of Compliance (MoC) Issue Paper A-1 --END-- 44

## Every issue (1)

- April 17, 2025: Issued, Current. [certificate](https://openairdocs.org/files/sha256/96/c1/96c183a73a20bda04e59bfb1a9fc6a0a1cbea1804341a3784706d2eb5bfadec5)

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