AD 47-47-12
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Sky Enterprises, Inc. | RC-3 | Airworthiness Directives; Republic Model RC-3 Aircraft |
Unsafe Condition
Excessive drop-off in engine r.p.m. when carburetor heat is used.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Install anti-swirl vanes, Republic P/N 17P 68014-20 in the air duct below the carburetor.
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Compliance Time
not later than December 31, 1947
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Affected Aircraft
Republic Model RC-3 Aircraft Serial Numbers 5 Through 1035 Inclusive Except the Following Which Have Been Modified at the Factory: 767, 915, 948, 949, 957, 959 Through 999 Inclusive, 1004 Through 1010 Inclusive, 1014, 1019 Through 1025 Inclusive. Serial 1036 and up Have Been Modified at the Factory Prior to Delivery.
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Federal Register Abstract
Carburetor Antiswirl Vanes
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_47-47-12.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 47-47-12 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Republic Model RC-3 Aircraft Subject: Carburetor Antiswirl Vanes Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Sky Enterprises, Inc. Model: RC-3 Product Type: Aircraft Product Subtype: Small Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 47-47-12 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 47-47-12 SUBJECT HEADING: Airworthiness Directives; Republic Model RC-3 Aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 47-47-12 REPUBLIC: (Was Mandatory Note 12 of AD-769-2.) Applies to RC-3 Aircraft Serial Numbers 5 Through 1035 Inclusive Except the Following Which Have Been Modified at the Factory: 767, 915, 948, 949, 957, 959 Through 999 Inclusive, 1004 Through 1010 Inclusive, 1014, 1019 Through 1025 Inclusive. Serial 1036 and up Have Been Modified at the Factory Prior to Delivery. Compliance required not later than December 31, 1947. To prevent excessive drop-off in engine r.p.m. when carburetor heat is used, anti-swirl vanes, Republic P/N 17P 68014-20 must be installed in the air duct below the carburetor. (Republic Seabee Service Bulletin No. 18 dated August 26, 1947, covers this same subject.) FOOTER:
Document Text
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AD Final Rules - DRS_47-47-12.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 47-47-12 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Republic Model RC-3 Aircraft Subject: Carburetor Antiswirl Vanes Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Sky Enterprises, Inc. Model: RC-3 Product Type: Aircraft Product Subtype: Small Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 47-47-12 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 47-47-12 SUBJECT HEADING: Airworthiness Directives; Republic Model RC-3 Aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 47-47-12 REPUBLIC: (Was Mandatory Note 12 of AD-769-2.) Applies to RC-3 Aircraft Serial Numbers 5 Through 1035 Inclusive Except the Following Which Have Been Modified at the Factory: 767, 915, 948, 949, 957, 959 Through 999 Inclusive, 1004 Through 1010 Inclusive, 1014, 1019 Through 1025 Inclusive. Serial 1036 and up Have Been Modified at the Factory Prior to Delivery. Compliance required not later than December 31, 1947. To prevent excessive drop-off in engine r.p.m. when carburetor heat is used, anti-swirl vanes, Republic P/N 17P 68014-20 must be installed in the air duct below the carburetor. (Republic Seabee Service Bulletin No. 18 dated August 26, 1947, covers this same subject.) FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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