AD 59-25-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Univair Aircraft Corporation | 415-C | Airworthiness Directives; FORNEY (ERCOUPE) Model All (ERCOUPE) Forney Aircraft |
| aircraft | Univair Aircraft Corporation | 415-CD | Airworthiness Directives; FORNEY (ERCOUPE) Model All (ERCOUPE) Forney Aircraft |
| aircraft | Univair Aircraft Corporation | 415-D | Airworthiness Directives; FORNEY (ERCOUPE) Model All (ERCOUPE) Forney Aircraft |
| aircraft | Univair Aircraft Corporation | F-1 | Airworthiness Directives; FORNEY (ERCOUPE) Model All (ERCOUPE) Forney Aircraft |
| aircraft | Univair Aircraft Corporation | 415-E | Airworthiness Directives; FORNEY (ERCOUPE) Model All (ERCOUPE) Forney Aircraft |
| aircraft | Univair Aircraft Corporation | 415-G | Airworthiness Directives; FORNEY (ERCOUPE) Model All (ERCOUPE) Forney Aircraft |
Unsafe Condition
Fatigue failures have continued to occur in the rudder main rib where the control horn is attached after installation of reinforcement plates.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
A visual inspection must be made of the area around the rudder control horn for excessive deflection of the horn, canning of rudder skin, or any other unusual peculiarity indicating main rudder rib damage. If damage is found, replace the rudder rib Erco P/N 415-240 12 L/R with Forney P/N F-24015 L/R or equivalent.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Compliance required by December 31, 1959, and thereafter every 100 hours of operation or periodic inspection, whichever occurs first.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
FORNEY (ERCOUPE) Model All (ERCOUPE) Forney Aircraft with serial numbers up to 3,335 inclusive.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Rudder reinforcement
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_59-25-05.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 59-25-05 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; FORNEY (ERCOUPE) Model All (ERCOUPE) Forney Aircraft Subject: Rudder reinforcement Status: Current Citation: This information is not available. Citation Publish Date: 12/10/1959 Effective Date: Make: Univair Aircraft Corporation Model: 415-C | 415-CD | 415-D | F-1 | 415-E | 415-G Product Type: Aircraft Product Subtype: Small Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: AIR-700: Compliance & Airworthiness Division Office of Primary Responsibility: AIR-770: West Certification Branch CFR Part Reference: Part 39 Comments: Updated RGL applicability to match AD applicability; CAR C-11-185 AIRWORTHINESS DIRECTIVES FINAL RULES: 59-25-05 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 59-25-05 SUBJECT HEADING: Airworthiness Directives; FORNEY (ERCOUPE) Model All (ERCOUPE) Forney Aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 59-25-05 FORNEY (ERCOUPE): Applies to All (Ercoupe) Forney Aircraft With Serial Numbers Up to 3,335 Inclusive. Compliance required by December 31, 1959, and thereafter every 100 hours of operation or periodic inspection, whichever occurs first. Fatigue failures have continued to occur in the rudder main rib where the control horn is attached after installation of reinforcement plates. Therefore, it is required that a visual inspection be made of the area around the rudder control horn for excessive deflection of the horn, canning of rudder skin, or any other unusual peculiarity which would indicate main rudder rib damage. If damage is evident, rudder rib Erco P/N 415-240 12 L/R must be replaced with Forney P/N F-24015 L/R or equivalent. This inspection may be discontinued when the heavier gage rib is installed. (Forney Service Bulletin No. 105 covers this subject.) This supersedes AD 47-20-07. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_59-25-05.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 59-25-05 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; FORNEY (ERCOUPE) Model All (ERCOUPE) Forney Aircraft Subject: Rudder reinforcement Status: Current Citation: This information is not available. Citation Publish Date: 12/10/1959 Effective Date: Make: Univair Aircraft Corporation Model: 415-C | 415-CD | 415-D | F-1 | 415-E | 415-G Product Type: Aircraft Product Subtype: Small Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: AIR-700: Compliance & Airworthiness Division Office of Primary Responsibility: AIR-770: West Certification Branch CFR Part Reference: Part 39 Comments: Updated RGL applicability to match AD applicability; CAR C-11-185 AIRWORTHINESS DIRECTIVES FINAL RULES: 59-25-05 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 59-25-05 SUBJECT HEADING: Airworthiness Directives; FORNEY (ERCOUPE) Model All (ERCOUPE) Forney Aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 59-25-05 FORNEY (ERCOUPE): Applies to All (Ercoupe) Forney Aircraft With Serial Numbers Up to 3,335 Inclusive. Compliance required by December 31, 1959, and thereafter every 100 hours of operation or periodic inspection, whichever occurs first. Fatigue failures have continued to occur in the rudder main rib where the control horn is attached after installation of reinforcement plates. Therefore, it is required that a visual inspection be made of the area around the rudder control horn for excessive deflection of the horn, canning of rudder skin, or any other unusual peculiarity which would indicate main rudder rib damage. If damage is evident, rudder rib Erco P/N 415-240 12 L/R must be replaced with Forney P/N F-24015 L/R or equivalent. This inspection may be discontinued when the heavier gage rib is installed. (Forney Service Bulletin No. 105 covers this subject.) This supersedes AD 47-20-07. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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