# STC ST00227MC

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: The Boeing Company, USA
- Description: Low Range Radar Altimeter 5G C-Band Upgrade as defined by FAA
- Applied: May 22, 2023
- Status date: September 20, 2023
- Product: Aircraft, Large Airplane
- Certification basis: Part 25
- Data sheets: [TCDS A20WE](https://openairdocs.org/tcds/A20WE)
- Certificate PDF: https://openairdocs.org/files/sha256/57/d2/57d22eea439844c85c2d5ece6831caf950d86a236050142886df4d422e42e480
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID183388393520231019211940.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/ST00227MC

## ADs that name it (0)

None.

## Approved models (1)

- The Boeing Company 747-200B Series ([TCDS A20WE](https://openairdocs.org/tcds/A20WE))

## 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.

Number: ST00227MC This certificate issued to: The Boeing Company 6001 S. Air Depot Blvd Oklahoma City, OK 73135 Part 25 of the Federal Aviation Regulations.

(See Type Certification Data Sheet No. A20WE and Page 3 of 3 Continuation Sheet).

Original Product Type Certificate Number: A20WE Make: Boeing Model: 747-200B Description of Type Design Change: Low Range Radar Altimeter 5G C-Band Upgrade as defined by FAA approved Boeing Document D519-62706 (MDL), Revision New, or later FAA approved revision.

1. 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.

2. This STC is applicable to serial numbers 23824, 23825, 20682, 20683, 20684, and 20949 for this Boeing- 747-200B.

Date of Application: May 22,2023 Date Reissued:

Date of Issuance: September 20,2023 Date Amended:

Title: Clay Magaña Project Administrator ODA-300064-NM

Number: ST00227MC

(Continuation Sheet) Number: ST00227MC

Part 25 of the Federal Aviation Regulations: (Continued)

1. Voluntary compliance has been shown with respect to the following regulations:

25.301, 25.303, 25.305, 25.307(a)(c), 25.333,

25.365(e)(g), 25.471, 25.571(a)(b), 25.601, 25.603,

25.605, 25.609, 25.611, 25.613(a)(b)(c)(d), 25.615,

25.831(b), 25.853(a), 25.1301(a)(b)(c)(d),

25.1309(a)(b)(e), 25.1353(a), 25.1431(a)(c),

25.1583(c)(1)(2) Amendment 25-00, effective February 1, 1965

25.1529 Amendment 25-54, effective October 14, 1980

25.1317(a)(b)(c) Amendment 25-122, effective September 5, 2007

25.1316(a)(b) Amendment 25-134, effective August 8, 2011

26.11(c) Amendment 26-0, effective December 10, 2007

Limitations and Conditions: (Continued)

3. This approval should not be incorporated in any aircraft of this specific model on which other approved modifications are incorporated, unless the installer determines that the interrelationship between this change and any of those previously incorporated approved modifications will not introduce any adverse effect upon the airworthiness of the airplane.

4. This STC approval is for the existing configuration as defined by the approved drawing list or later FAA approved changes which have been reviewed and approved by the appropriate ODA-300064-NM staff members.

5. This approval is limited to the airplanes listed in Boeing Document D519-62706, Revision New, or later FAA approved revision.

6. Installation of this STC modification must be accomplished at a Boeing Repair Station utilizing Boeing Work Orders as Installation Instructions. FAA approved changes to this STC may be installed at locations other than a Boeing FAA Repair Station if the changes are prepared in the form of kit engineering and include adequate installation instructions.

-END-

## Every issue (1)

- September 20, 2023: Issued, Current. [certificate](https://openairdocs.org/files/sha256/57/d2/57d22eea439844c85c2d5ece6831caf950d86a236050142886df4d422e42e480)

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