AD 47-47-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | FS 2003 Corp. | PA-12 | Airworthiness Directives; Piper Model PA-12 Aircraft |
Unsafe Condition
The upper end of the tie strap on the landing gear may fail due to insufficient reinforcement, leading to potential structural failure of the landing gear during operation.
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Required Actions
Reinforce the upper end of the tie strap with a 4130 steel plate (Piper No. 10028-13) by edge welding. Install a trapezoidal gusset plate (Piper No. 10028-14) on each side of the upper strap attachment by forming and edge welding on assembly.
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Compliance Time
prior to January 15, 1948
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Affected Aircraft
PA-12 Aircraft Serial Numbers 12-221, 12-236, 12-239, 12-244, 12-250 and Up to 12-3561 and 12-3901 to 12-3988.
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Federal Register Abstract
Landing Gear Reinforcement
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_47-47-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 47-47-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Piper Model PA-12 Aircraft Subject: Landing Gear Reinforcement Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: FS 2003 Corp. Model: PA-12 Product Type: Aircraft Product Subtype: Small Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 47-47-01 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 47-47-01 SUBJECT HEADING: Airworthiness Directives; Piper Model PA-12 Aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 47-47-01 PIPER: (Was Mandatory Note 5 of AD-780-3.) Applies to PA-12 Aircraft Serial Numbers 12-221, 12-236, 12-239, 12-244, 12-250 and Up to 12-3561 and 12-3901 to 12- 3988. Compliance required prior to January 15, 1948. Reinforce the upper end of the tie strap on the landing gear with a 4130 steel plate (Piper No. 10028-13). Install over end of strap by edge welding. As further reinforcement, install a trapezoidal gusset plate (Piper No. 10028-14) on each side of this upper strap attachment by forming and edge welding on assembly. (Piper Service Bulletin No. 97 dated July 10, 1947, covers this same subject.) FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_47-47-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 47-47-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Piper Model PA-12 Aircraft Subject: Landing Gear Reinforcement Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: FS 2003 Corp. Model: PA-12 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: 47-47-01 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 47-47-01 SUBJECT HEADING: Airworthiness Directives; Piper Model PA-12 Aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 47-47-01 PIPER: (Was Mandatory Note 5 of AD-780-3.) Applies to PA-12 Aircraft Serial Numbers 12-221, 12-236, 12-239, 12-244, 12-250 and Up to 12-3561 and 12-3901 to 12- 3988. Compliance required prior to January 15, 1948. Reinforce the upper end of the tie strap on the landing gear with a 4130 steel plate (Piper No. 10028-13). Install over end of strap by edge welding. As further reinforcement, install a trapezoidal gusset plate (Piper No. 10028-14) on each side of this upper strap attachment by forming and edge welding on assembly. (Piper Service Bulletin No. 97 dated July 10, 1947, covers this same subject.) FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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