AD 51-21-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | FS 2003 Corp. | PA-12 | Airworthiness Directives; Piper All Model PA-12 Airplanes |
| aircraft | FS 2003 Corp. | PA-12S | Airworthiness Directives; Piper All Model PA-12 Airplanes |
Unsafe Condition
Cracks at the bend between the channel and flat portions of the aileron hinge brackets to false spar attachment fittings, part number N10931.
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Required Actions
Inspect aileron hinge brackets to false spar attachment fittings (P/N N10931) for cracks at the bend. If cracks are found, install reinforcement bracket P/N 12047. Discontinue inspections if reinforcement brackets are installed.
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Compliance Time
Not later than October 15, 1951, and each 100 hours of operation thereafter unless reinforcements are installed.
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Affected Aircraft
Piper All Model PA-12 Airplanes.
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Federal Register Abstract
Aileron Hinge Brackets
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_51-21-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 51-21-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Piper All Model PA-12 Airplanes Subject: Aileron Hinge Brackets Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: FS 2003 Corp. Model: PA-12 | PA-12S Product Type: Aircraft Product Subtype: Small Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 51-21-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 51-21-02 SUBJECT HEADING: Airworthiness Directives; Piper All Model PA-12 Airplanes ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 51-21-02 PIPER: Applies to All Model PA-12 Airplanes. Compliance required not later than October 15, 1951, and each 100 hours of operation thereafter unless reinforcements are installed. Carefully inspect aileron hinge brackets to false spar attachment fittings, P/N N10931, (3 per wing), for cracks at the bend between the channel and flat portions of the fittings. If cracked fittings are found, add reinforcement bracket P/N 12047. With reinforcement brackets P/N 12047 installed, special inspections may be discontinued. (Piper Service Bulletin No. 107, dated September 24, 1948, covers this same subject.) FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_51-21-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 51-21-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Piper All Model PA-12 Airplanes Subject: Aileron Hinge Brackets Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: FS 2003 Corp. Model: PA-12 | PA-12S 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: 51-21-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 51-21-02 SUBJECT HEADING: Airworthiness Directives; Piper All Model PA-12 Airplanes ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 51-21-02 PIPER: Applies to All Model PA-12 Airplanes. Compliance required not later than October 15, 1951, and each 100 hours of operation thereafter unless reinforcements are installed. Carefully inspect aileron hinge brackets to false spar attachment fittings, P/N N10931, (3 per wing), for cracks at the bend between the channel and flat portions of the fittings. If cracked fittings are found, add reinforcement bracket P/N 12047. With reinforcement brackets P/N 12047 installed, special inspections may be discontinued. (Piper Service Bulletin No. 107, dated September 24, 1948, covers this same subject.) FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.
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