AD 47-43-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Cessna Aircraft Company | 120 | Airworthiness Directives; CESSNA Model 120 and 140 Airplanes |
| aircraft | Cessna Aircraft Company | 140 | Airworthiness Directives; CESSNA Model 120 and 140 Airplanes |
Unsafe Condition
Failure of the primer line could allow fuel contact with the left exhaust manifold.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Reroute the lower end of the primer line on the left side of the firewall, rotate the strainer fitting to point downward and left at 60 degrees from horizontal, install vinylite tubing over the upper and lower ends of the primer line, and add a shield between the tubing pieces.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
prior to January 1, 1948
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Cessna Model 120 and 140 Aircraft, serial numbers up to and including 11842
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Primer Line Relocation
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_47-43-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 47-43-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; CESSNA Model 120 and 140 Airplanes Subject: Primer Line Relocation Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Cessna Aircraft Company Model: 120 | 140 Product Type: Aircraft Product Subtype: Small Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 47-43-01 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 47-43-01 SUBJECT HEADING: Airworthiness Directives; CESSNA Model 120 and 140 Airplanes ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 47-43-01 CESSNA: (Was Mandatory Note 12 of AD-768-5.) Applies to 120 and 140 Aircraft Serial Numbers Up to and Including 11842. Compliance required prior to January 1, 1948. Reroute the lower end of the primer line located on the left side of the firewall and rotate the strainer fitting so that it points downward and to the left at an angle of 60 degrees to the horizontal. Slip approximately 6 inches of vinylite tubing over the upper and lower ends of this primer line and install a shield around this line between the two pieces of vinylite tubing. This will preclude the possibility of fuel coming in contact with the left exhaust manifold in the event of a failure in this primer line. (Cessna Service Letter No. 34, dated March 24, 1947, covers this same subject.) FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_47-43-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 47-43-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; CESSNA Model 120 and 140 Airplanes Subject: Primer Line Relocation Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Cessna Aircraft Company Model: 120 | 140 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: 47-43-01 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 47-43-01 SUBJECT HEADING: Airworthiness Directives; CESSNA Model 120 and 140 Airplanes ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 47-43-01 CESSNA: (Was Mandatory Note 12 of AD-768-5.) Applies to 120 and 140 Aircraft Serial Numbers Up to and Including 11842. Compliance required prior to January 1, 1948. Reroute the lower end of the primer line located on the left side of the firewall and rotate the strainer fitting so that it points downward and to the left at an angle of 60 degrees to the horizontal. Slip approximately 6 inches of vinylite tubing over the upper and lower ends of this primer line and install a shield around this line between the two pieces of vinylite tubing. This will preclude the possibility of fuel coming in contact with the left exhaust manifold in the event of a failure in this primer line. (Cessna Service Letter No. 34, dated March 24, 1947, covers this same subject.) FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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