AD 75-04-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Regal Air, Inc. | 305A | Airworthiness Directives; CESSNA Model 305A Series Airplanes |
Unsafe Condition
Failure of the aluminum elbow fitting, part number X34352, could occur due to corrosion or fatigue, leading to oil line system failure.
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Required Actions
Remove the aluminum elbow fitting P/N X34352 from the oil cooler and replace it with a brass fabricated fitting of the same part number, Weatherhead P/N C5405X10X6, or an equivalent part approved by the FAA. Follow proper flex line installation procedures as outlined in AC 43.13-1A, Chapter 10.
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Compliance Time
within the next twenty-five hours' time in service after the effective date of this AD, unless already accomplished
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Affected Aircraft
Cessna Model 305A series airplanes modified with STC SA568SW or SA504SW (oil line rerouting), including those listed in Note 3 of Aircraft Specification 5A5.
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Federal Register Abstract
Oil Line System
Applicability Source Text
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AD Final Rules - DRS_75-04-04.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 75-04-04 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; CESSNA Model 305A Series Airplanes Subject: Oil Line System Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Regal Air, Inc. Model: 305A Product Type: Aircraft Product Subtype: Small Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 75-04-04 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-2203 AD NUMBER: 75-04-04 SUBJECT HEADING: Airworthiness Directives; CESSNA Model 305A Series Airplanes ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 75-04-04 CESSNA AIRCRAFT CORPORATION: Amendment 39-2067 as amended by Amendment 39-2203. Applies to Cessna Model 305A series airplanes, modified in accordance with STC SA568SW or SA504SW (oil line rerouting), including airplanes listed in Note 3 of Aircraft Specification 5A5. Compliance required within the next twenty-five hours' time in service after the effective date of this AD, unless already accomplished. To prevent failure of the aluminum elbow fitting, P/N X34352, remove the fitting from the oil cooler and replace with a fitting of the same part number fabricated from brass, or Weatherhead P/N C5405X10X6, or an equivalent part approved by the Chief, Engineering and Manufacturing Branch, Flight Standards Division, Southwest Region, Federal Aviation Administration, Fort Worth, Texas. (NOTE: Advisory Circular AC 43.13-1A, Chapter 10, provides information on the proper flex line installation procedure that should be followed when reconnecting the oil system line. These parts are available from Ector Aircraft Company, 414 East Hillmont, Odessa, Texas 79760.) Amendment 39-2067 became effective March 10, 1975. This amendment 39-2203 becomes effective upon publication in the Federal Register. FOOTER:
Document Text
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AD Final Rules - DRS_75-04-04.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 75-04-04 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; CESSNA Model 305A Series Airplanes Subject: Oil Line System Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Regal Air, Inc. Model: 305A 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: 75-04-04 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-2203 AD NUMBER: 75-04-04 SUBJECT HEADING: Airworthiness Directives; CESSNA Model 305A Series Airplanes ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 75-04-04 CESSNA AIRCRAFT CORPORATION: Amendment 39-2067 as amended by Amendment 39-2203. Applies to Cessna Model 305A series airplanes, modified in accordance with STC SA568SW or SA504SW (oil line rerouting), including airplanes listed in Note 3 of Aircraft Specification 5A5. Compliance required within the next twenty-five hours' time in service after the effective date of this AD, unless already accomplished. To prevent failure of the aluminum elbow fitting, P/N X34352, remove the fitting from the oil cooler and replace with a fitting of the same part number fabricated from brass, or Weatherhead P/N C5405X10X6, or an equivalent part approved by the Chief, Engineering and Manufacturing Branch, Flight Standards Division, Southwest Region, Federal Aviation Administration, Fort Worth, Texas. (NOTE: Advisory Circular AC 43.13-1A, Chapter 10, provides information on the proper flex line installation procedure that should be followed when reconnecting the oil system line. These parts are available from Ector Aircraft Company, 414 East Hillmont, Odessa, Texas 79760.) Amendment 39-2067 became effective March 10, 1975. This amendment 39-2203 becomes effective upon publication in the Federal Register. FOOTER:
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Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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