AD 55-22-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Univair Aircraft Corporation | 415-C | Airworthiness Directives; ERCO 415-C, -CD and -D Aircraft |
| aircraft | Univair Aircraft Corporation | 415-CD | Airworthiness Directives; ERCO 415-C, -CD and -D Aircraft |
| aircraft | Univair Aircraft Corporation | 415-D | Airworthiness Directives; ERCO 415-C, -CD and -D Aircraft |
Unsafe Condition
Leakage in terneplate fuselage fuel tanks and terneplate wing fuel tanks due to corrosion or material degradation.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect tanks for leakage every 25 flight hours. Replace leaking tanks with stainless steel or aluminum alloy tanks before next flight. Replace terneplate tanks with approved materials if not already done.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
before the next flight
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Affected Aircraft
Univair Aircraft Corporation 415-C, -CD, and -D aircraft, serial numbers 113 through 2468 (fuselage tanks) and 113 through 2622 (wing tanks)
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Wing Tank Replacements
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_55-22-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 55-22-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; ERCO 415-C, -CD and -D Aircraft Subject: Wing Tank Replacements 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Aircraft Corporation Model: 415-C | 415-CD | 415-D Product Type: Aircraft Product Subtype: Small Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 55-22-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 55-22-02 SUBJECT HEADING: Airworthiness Directives; ERCO 415-C, -CD and -D Aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 55-22-02 ERCO: Applies to 415-C, -CD and -D Aircraft Serial Numbers 113 Through 2468 for Fuselage Tank Replacement; Serial Numbers 113 Through 2622 For Wing Tank Replacements. Inspection required each 25 hours; replacement at time leakage discovered. Unless the terneplate fuselage fuel tank has been replaced with a stainless steel tank and the terneplate wing fuel tanks replaced with aluminum alloy or stainless steel tanks, the tanks should be inspected frequently for signs of leakage at intervals not greater than 25 hours. If tank leakage is observed, the tank should be replaced with one of stainless steel or aluminum alloy, as required, before the next flight. Erco Service Department Bulletins No. 10 and No. 10A and Memorandums No. 31 and 43 pertain to the inspection and replacement of these tanks. This supersedes AD 47-50-10. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_55-22-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 55-22-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; ERCO 415-C, -CD and -D Aircraft Subject: Wing Tank Replacements 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: 55-22-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 55-22-02 SUBJECT HEADING: Airworthiness Directives; ERCO 415-C, -CD and -D Aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 55-22-02 ERCO: Applies to 415-C, -CD and -D Aircraft Serial Numbers 113 Through 2468 for Fuselage Tank Replacement; Serial Numbers 113 Through 2622 For Wing Tank Replacements. Inspection required each 25 hours; replacement at time leakage discovered. Unless the terneplate fuselage fuel tank has been replaced with a stainless steel tank and the terneplate wing fuel tanks replaced with aluminum alloy or stainless steel tanks, the tanks should be inspected frequently for signs of leakage at intervals not greater than 25 hours. If tank leakage is observed, the tank should be replaced with one of stainless steel or aluminum alloy, as required, before the next flight. Erco Service Department Bulletins No. 10 and No. 10A and Memorandums No. 31 and 43 pertain to the inspection and replacement of these tanks. This supersedes AD 47-50-10. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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Related Airworthiness Directives
2012-08-06
final ruleAirworthiness Directives; Univair Aircraft Corporation Airplanes
Unsafe Condition: The FAA is correcting an airworthiness directive (AD) that published in the Federal Register. That AD applies to certain Univair Aircraft Corporation Models (ERCO) 415-C, 415-CD, 415-D, E, G; (Forn...
2003-21-01 Recurring
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2002-26-02 Recurring
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2002-16-04
final ruleAirworthiness Directives; Univair Aircraft Corporation Models (ERCO) 415-C, (ERCO) 415-CD, (ERCO) 415-D, (ERCO) 415-E, (ERCO) 415-G, (Forney) F-1, and (Forney) F-1A Airplanes
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