AD 50-07-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Univair Aircraft Corporation | 415-C | Airworthiness Directives; ERCO Model 415C, 415CD and 415D Airplanes |
| aircraft | Univair Aircraft Corporation | 415-CD | Airworthiness Directives; ERCO Model 415C, 415CD and 415D Airplanes |
| aircraft | Univair Aircraft Corporation | 415-D | Airworthiness Directives; ERCO Model 415C, 415CD and 415D Airplanes |
Unsafe Condition
Failure of the elevator trim tab control wire could lead to elevator flutter.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Install elevator trim tab stop and spring, Erco P/N 415-SK-287 and 415-22035.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
by September 1, 1950
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Univair Aircraft Corporation Models 415C, 415CD, and 415D airplanes incorporating adjustable elevator trim tabs.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Elevator trim tab stop
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_50-07-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 50-07-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; ERCO Model 415C, 415CD and 415D Airplanes Subject: Elevator trim tab stop Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Univair Aircraft Corporation Model: 415-C | 415-CD | 415-D Product Type: Aircraft Product Subtype: Small Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 50-07-01 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 50-07-01 SUBJECT HEADING: Airworthiness Directives; ERCO Model 415C, 415CD and 415D Airplanes ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 50-07-01 ERCO: Applies to Ercoupe Models 415C (Which Incorporate Adjustable Elevator Trim Tabs), 415CD, and 415D Airplanes. To be accomplished by September 1, 1950. To preclude the possibility of elevator flutter in the event the elevator trim tab control wire fails, elevator trim tab stop and spring, Erco P/N 415-SK-287 and 415-22035 should be installed. (Engineering and Research Corp. "Ercoupe Service Memorandum No. 55 and 55A" cover this same subject.) FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_50-07-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 50-07-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; ERCO Model 415C, 415CD and 415D Airplanes Subject: Elevator trim tab stop Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Univair Aircraft Corporation Model: 415-C | 415-CD | 415-D 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: 50-07-01 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 50-07-01 SUBJECT HEADING: Airworthiness Directives; ERCO Model 415C, 415CD and 415D Airplanes ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 50-07-01 ERCO: Applies to Ercoupe Models 415C (Which Incorporate Adjustable Elevator Trim Tabs), 415CD, and 415D Airplanes. To be accomplished by September 1, 1950. To preclude the possibility of elevator flutter in the event the elevator trim tab control wire fails, elevator trim tab stop and spring, Erco P/N 415-SK-287 and 415-22035 should be installed. (Engineering and Research Corp. "Ercoupe Service Memorandum No. 55 and 55A" cover this same subject.) FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.
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