AD 79-20-10
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Piper Aircraft Inc. | PA-24 | Airworthiness Directives; Piper Model PA-24, PA-24-250, PA-24-260, PA-24-400, PA-30, and PA-39 Airplanes |
| aircraft | Piper Aircraft Inc. | PA-24-250 | Airworthiness Directives; Piper Model PA-24, PA-24-250, PA-24-260, PA-24-400, PA-30, and PA-39 Airplanes |
| aircraft | Piper Aircraft Inc. | PA-24-260 | Airworthiness Directives; Piper Model PA-24, PA-24-250, PA-24-260, PA-24-400, PA-30, and PA-39 Airplanes |
| aircraft | Piper Aircraft Inc. | PA-24-400 | Airworthiness Directives; Piper Model PA-24, PA-24-250, PA-24-260, PA-24-400, PA-30, and PA-39 Airplanes |
| aircraft | Piper Aircraft Inc. | PA-30 | Airworthiness Directives; Piper Model PA-24, PA-24-250, PA-24-260, PA-24-400, PA-30, and PA-39 Airplanes |
| aircraft | Piper Aircraft Inc. | PA-39 | Airworthiness Directives; Piper Model PA-24, PA-24-250, PA-24-260, PA-24-400, PA-30, and PA-39 Airplanes |
Unsafe Condition
Failure of the horizontal stabilizer due to fatigue cracking in the spar cap or spar web of the horizontal stabilizer.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the horizontal stabilizer spar cap and spar web in accordance with Service Letter No. 850 dated April 18, 1979, Parts 1, 2, 3, 4a, b, and c. Perform inspections within the next 50 hours in service and at intervals not exceeding 100 hours in service thereafter. Terminate inspections upon incorporation of Piper Kit No. 763 893 or equivalent.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the next 50 hours in service after the effective date of this AD, unless already accomplished within the past 50 hours in service.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Piper Model PA-24, PA-24-250, PA-24-260, PA-24-400, PA-30, and PA-39 airplanes with serial numbers as specified: PA-24 (24-1 and up), PA-24-250 (24-1 and up), PA-24-260 (24-3642, 24-4000 and up), PA-24-400 (26-1 and up), PA-30 (30-1 and up), PA-39 (39-1 and up), except those incorporating Piper Kit Part No. 763 893.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Piper Kit 763 893
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_79-20-10.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 79-20-10 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Piper Model PA-24, PA-24-250, PA-24-260, PA-24-400, PA-30, and PA-39 Airplanes Subject: Piper Kit 763 893 Status: Current Citation: This information is not available. Citation Publish Date: 10/01/1979 Effective Date: 10/04/1979 Make: Piper Aircraft Inc. Model: PA-24 | PA-24-250 | PA-24-260 | PA-24-400 | PA-30 | PA-39 Product Type: Aircraft Product Subtype: Small Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: AIR-700: Compliance & Airworthiness Division Office of Primary Responsibility: AIR-720: Operational Safety Branch CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 79-20-10 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-3579 AD NUMBER: 79-20-10 SUBJECT HEADING: Airworthiness Directives; Piper Model PA-24, PA-24-250, PA-24-260, PA-24-400, PA-30, and PA-39 Airplanes ACTION: SUMMARY: DATES: Effective October 4, 1979. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 79-20-10 PIPER: Amendment 39-3579. Applies to the following Piper Model airplanes: PA-24 Serial Nos. 24-1 and up PA-24-250 Serial Nos. 24-1 and up PA-24-260 Serial Nos. 24-3642, 24-4000 and up PA-24-400 Serial Nos. 26-1 and up PA-30 Serial Nos. 30-1 and up PA-39 Serial Nos. 39-1 and up, certificated in all categories except airplanes incorporating Piper Kit Part No. 763 893: (a) Within the next 50 hours in service, after the effective date of this AD, unless already accomplished within the past 50 hours in service and at intervals not to exceed 100 hours in service thereafter, inspect in accordance with paragraph "Instructions" in Service Letter No. 850 dated April 18, 1979, Parts 1, 2, 3, 4a, b and c or equivalent inspection. (b) Upon incorporation of Piper Kit No. 763 893 or equivalent, compliance with this AD may be terminated. (c) Equivalent parts and inspections and alterations must be approved by the Chief, Engineering and Manufacturing Branch, FAA, Eastern Region. (d) Upon submittal of substantiating data by an owner or operator through an FAA Maintenance Inspector, the Chief, Engineering and Manufacturing Branch, FAA, Eastern Region, may adjust the inspection intervals specified in this AD. This supersedes AD 74-10-03. This amendment is effective October 4, 1979. FOOTER:
Document Text
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AD Final Rules - DRS_79-20-10.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 79-20-10 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Piper Model PA-24, PA-24-250, PA-24-260, PA-24-400, PA-30, and PA-39 Airplanes Subject: Piper Kit 763 893 Status: Current Citation: This information is not available. Citation Publish Date: 10/01/1979 Effective Date: 10/04/1979 Make: Piper Aircraft Inc. Model: PA-24 | PA-24-250 | PA-24-260 | PA-24-400 | PA-30 | PA-39 Product Type: Aircraft Product Subtype: Small Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: AIR-700: Compliance & Airworthiness Division Office of Primary Responsibility: AIR-720: Operational Safety Branch CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 79-20-10 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-3579 AD NUMBER: 79-20-10 SUBJECT HEADING: Airworthiness Directives; Piper Model PA-24, PA-24-250, PA-24-260, PA-24-400, PA-30, and PA-39 Airplanes ACTION: SUMMARY: DATES: Effective October 4, 1979. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 79-20-10 PIPER: Amendment 39-3579. Applies to the following Piper Model airplanes: PA-24 Serial Nos. 24-1 and up PA-24-250 Serial Nos. 24-1 and up PA-24-260 Serial Nos. 24-3642, 24-4000 and up PA-24-400 Serial Nos. 26-1 and up PA-30 Serial Nos. 30-1 and up PA-39 Serial Nos. 39-1 and up, certificated in all categories except airplanes incorporating Piper Kit Part No. 763 893: (a) Within the next 50 hours in service, after the effective date of this AD, unless already accomplished within the past 50 hours in service and at intervals not to exceed 100 hours in service thereafter, inspect in accordance with paragraph "Instructions" in Service Letter No. 850 dated April 18, 1979, Parts 1, 2, 3, 4a, b and c or equivalent inspection. (b) Upon incorporation of Piper Kit No. 763 893 or equivalent, compliance with this AD may be terminated. (c) Equivalent parts and inspections and alterations must be approved by the Chief, Engineering and Manufacturing Branch, FAA, Eastern Region. (d) Upon submittal of substantiating data by an owner or operator through an FAA Maintenance Inspector, the Chief, Engineering and Manufacturing Branch, FAA, Eastern Region, may adjust the inspection intervals specified in this AD. This supersedes AD 74-10-03. This amendment is effective October 4, 1979. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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