# AD 47-21-18: Mixture Control Support Bracket

- Type: Airworthiness directive
- Status: Current
- Products: Sky Enterprises RC-3
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Registered aircraft: 126 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/62E71D4DFFA63DD586256A560066642D.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/47-21-18

## The airworthiness directive

47-21-18 REPUBLIC: (Was Mandatory Note 8 of AD-769-2.) Applies to Model RC-3 Aircraft Serial Numbers 5 Through 303, 305 Through 367, 369 Through 398, 400 Through 445, 448 and 449, 451 Through 454, 456 Through 459, 461 Through 466, 469 and 470, 472, 474, 479 and 482.

Compliance required prior to next flight.

Prior to each flight until reinforced support bracket is installed, inspect mixture control support at carburetor air filter housing for evidence of cracking. Support bracket must be installed not later than the next 25 hours of operation after July 1, 1947, and in no case later than August 1, 1947.

(Republic Seabee Service Bulletin No. 11 dated March 10, 1947, covers this same subject.)

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A-769](https://openairdocs.org/tcds/A-769): Sky Enterprises Inc.; names 1 of 1 models: RC-3

## Registered aircraft it may apply to (OpenAirDocs)

Matched by airframe and engine model; the AD's applicability may narrow it by serial number, part number or equipment.

- Aircraft: 126 (126 by airframe model, 0 by engine model)
- Makers: Republic 122, Downer 2, Republic Aviation Corp USA 1, Simuflight Seattle-1-Stol 1

Models with the most aircraft:

- [Republic RC-3](https://openairdocs.org/model/republic-rc-3): 122 aircraft (airframe model)
- [Downer RC-3](https://openairdocs.org/model/downer-rc-3): 2 aircraft (airframe model)
- [Republic Aviation Corp USA SEABEE RC-3](https://openairdocs.org/model/republic-aviation-corp-usa-seabee-rc-3): 1 aircraft (airframe model)
- [Simuflight Seattle-1-Stol RC-3](https://openairdocs.org/model/simuflight-seattle-1-stol-rc-3): 1 aircraft (airframe model)

All 4 models: https://openairdocs.org/ad/47-21-18/models.md
Every aircraft: https://openairdocs.org/ad/47-21-18/aircraft.md

Its text cites no advisory circulars or STCs.

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