AD 51-28-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Ryan Aeronautical Company | ST-3KR | Airworthiness Directives; Ryan Model ST-3KR (Military PT-22) Aircraft. |
Unsafe Condition
Failure to observe placard procedures for fuel selector valve position during takeoff and landing can result in fatal accidents due to insufficient fuel supply.
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Required Actions
Install a placard or revise the existing placard to read: 'Always take off and land with fuel feeding from RESERVE'.
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Compliance Time
by February 1, 1952, or next 100-hour inspection, whichever is first
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Affected Aircraft
Ryan Aeronautical Company Model ST-3KR (Military PT-22) Aircraft, all serial numbers
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Federal Register Abstract
Fuel Valve Placard
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_51-28-03.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 51-28-03 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Ryan Model ST-3KR (Military PT-22) Aircraft. Subject: Fuel Valve Placard Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Ryan Aeronautical Company Model: ST-3KR Product Type: Aircraft Product Subtype: Small Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 51-28-03 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 51-28-03 SUBJECT HEADING: Airworthiness Directives; Ryan Model ST-3KR (Military PT-22) Aircraft. ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 51-28-03 RYAN: Applies to All Model ST-3KR (Military PT-22) Aircraft. To be accomplished by February 1, 1952, or next 100-hour inspection, whichever is first. The fuel selector valve handles for these aircraft are usually placarded "Always take off with fuel feeding from Reserve". However, there have been fatal accidents which resulted from failure to observe this procedure, or from failure to return to the Reserve position when landing with a low fuel supply. Therefore, the following placard must be installed, or the existing placard revised to read: "Always take off and land with fuel feeding from RESERVE". FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_51-28-03.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 51-28-03 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Ryan Model ST-3KR (Military PT-22) Aircraft. Subject: Fuel Valve Placard Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Ryan Aeronautical Company Model: ST-3KR 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: 51-28-03 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 51-28-03 SUBJECT HEADING: Airworthiness Directives; Ryan Model ST-3KR (Military PT-22) Aircraft. ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 51-28-03 RYAN: Applies to All Model ST-3KR (Military PT-22) Aircraft. To be accomplished by February 1, 1952, or next 100-hour inspection, whichever is first. The fuel selector valve handles for these aircraft are usually placarded "Always take off with fuel feeding from Reserve". However, there have been fatal accidents which resulted from failure to observe this procedure, or from failure to return to the Reserve position when landing with a low fuel supply. Therefore, the following placard must be installed, or the existing placard revised to read: "Always take off and land with fuel feeding from RESERVE". FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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