AD 81-23-06
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Piper Aircraft Inc. | PA-31P | Airworthiness Directives; Piper Model PA-31P, PA-31T and Model PA-31T1 Airplanes |
| aircraft | Piper Aircraft Inc. | PA-31T | Airworthiness Directives; Piper Model PA-31P, PA-31T and Model PA-31T1 Airplanes |
| aircraft | Piper Aircraft Inc. | PA-31T1 | Airworthiness Directives; Piper Model PA-31P, PA-31T and Model PA-31T1 Airplanes |
Unsafe Condition
Cracks in the outboard flap track, attachment angles, wing rib flange, and the rear spar web could cause possible hazards in flight.
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Required Actions
Inspect, repair, and alter the flap track structure in accordance with Piper Kit No. 763 986 or equivalent. Alternate inspections, repairs, or alterations approved by the Chief, Engineering and Manufacturing Branch, FAA, Eastern Region may be used. Adjusted inspection intervals may be approved upon submission of substantiating data through an FAA Maintenance Inspector.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the next 50 hours in service from the effective date of this AD or upon the attainment of 1000 hours in service, whichever is later
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Affected Aircraft
Piper Model PA-31P (Serial Nos. 31P-1 thru 31P-7730012), PA-31T (Serial Nos. 31T-7400002 thru 31T-8020086), and PA-31T1 (Serial Nos. 31T-7804001 thru 31T-8104001) except aircraft incorporating Piper Kit No. 763 986.
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Federal Register Abstract
Flap Track Structure
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_81-23-06.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 81-23-06 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Piper Model PA-31P, PA-31T and Model PA-31T1 Airplanes Subject: Flap Track Structure Status: Current Citation: This information is not available. Citation Publish Date: 11/08/1981 Effective Date: 11/16/1981 Make: Piper Aircraft Inc. Model: PA-31P | PA-31T | PA-31T1 Product Type: Aircraft Product Subtype: Small Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: AIR-700: Compliance & Airworthiness Division Office of Primary Responsibility: AIR-720: Operational Safety Branch CFR Part Reference: Part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: 81-23-06 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-4254 AD NUMBER: 81-23-06 SUBJECT HEADING: Airworthiness Directives; Piper Model PA-31P, PA-31T and Model PA-31T1 Airplanes ACTION: SUMMARY: DATES: Effective November 16, 1981. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 81-23-06 PIPER: Amendment 39-4254. Applies to Model PA-31P, Serial Nos. 31P-1 thru 31P-7730012, Model PA-31T, Serial Nos. 31T-7400002 thru 31T-8020086 and Model PA-31T1 Serial Nos. 31T-7804001 thru 31T-8104001 certificated in all categories except aircraft incorporating Piper Kit No. 763 986. To prevent possible hazards in flight associated with cracks in the outboard flap track, attachment angles, wing rib flange and the rear spar web accomplish the following: a. Within the next 50 hours in service from the effective date of this AD or upon the attainment of 1000 hours in service, whichever is later, inspect, repair and alter the flap track structure in accordance with Piper Kit No. 763 986 or equivalent. b. Alternate inspections, repairs or alterations which provide an equivalent level of safety may be used when approved by the Chief, Engineering and Manufacturing Branch, FAA, Eastern Region. c. Upon submission 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. (Piper Service Bulletin No. 647A dated November 24, 1980, refers to this subject.) This amendment is effective November 16, 1981. FOOTER:
Document Text
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AD Final Rules - DRS_81-23-06.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 81-23-06 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Piper Model PA-31P, PA-31T and Model PA-31T1 Airplanes Subject: Flap Track Structure Status: Current Citation: This information is not available. Citation Publish Date: 11/08/1981 Effective Date: 11/16/1981 Make: Piper Aircraft Inc. Model: PA-31P | PA-31T | PA-31T1 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: 81-23-06 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-4254 AD NUMBER: 81-23-06 SUBJECT HEADING: Airworthiness Directives; Piper Model PA-31P, PA-31T and Model PA-31T1 Airplanes ACTION: SUMMARY: DATES: Effective November 16, 1981. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 81-23-06 PIPER: Amendment 39-4254. Applies to Model PA-31P, Serial Nos. 31P-1 thru 31P-7730012, Model PA-31T, Serial Nos. 31T-7400002 thru 31T-8020086 and Model PA-31T1 Serial Nos. 31T-7804001 thru 31T-8104001 certificated in all categories except aircraft incorporating Piper Kit No. 763 986. To prevent possible hazards in flight associated with cracks in the outboard flap track, attachment angles, wing rib flange and the rear spar web accomplish the following: a. Within the next 50 hours in service from the effective date of this AD or upon the attainment of 1000 hours in service, whichever is later, inspect, repair and alter the flap track structure in accordance with Piper Kit No. 763 986 or equivalent. b. Alternate inspections, repairs or alterations which provide an equivalent level of safety may be used when approved by the Chief, Engineering and Manufacturing Branch, FAA, Eastern Region. c. Upon submission 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. (Piper Service Bulletin No. 647A dated November 24, 1980, refers to this subject.) This amendment is effective November 16, 1981. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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