AD 74-14-06
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Piper Aircraft Inc. | PA-36-285 | Airworthiness Directives; Piper Model PA-36-285 Airplanes |
Unsafe Condition
Bolts installed in the wing spar carry through assembly could be subject to deformation.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Remove four AN 4C-11A bolts and corresponding nuts and washers from the spar center section carry through left and right end vertical stiffeners. Enlarge the four holes to 5/16" +.005 -.001 diameter and install AN5-11A bolts with specified washers and nuts, torqued to 100-140 inch pounds. If hole elongation or wear persists, replace or repair damaged parts per FAA approval.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within the next 25 hours time in service after the effective date of this AD unless already accomplished
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Piper Model PA-36-285 airplanes, serial numbers 36-7360001 through 36-7460016
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Wing Spar
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_74-14-06.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 74-14-06 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Piper Model PA-36-285 Airplanes Subject: Wing Spar Status: Current Citation: This information is not available. Citation Publish Date: 07/05/1974 Effective Date: 07/08/1974 Make: Piper Aircraft Inc. Model: PA-36-285 Product Type: Aircraft Product Subtype: Small Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: AIR-700: Compliance & Airworthiness Division Office of Primary Responsibility: AIR-720: Operational Safety Branch CFR Part Reference: Part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: 74-14-06 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-1885 AD NUMBER: 74-14-06 SUBJECT HEADING: Airworthiness Directives; Piper Model PA-36-285 Airplanes ACTION: SUMMARY: DATES: Effective July 8, 1974. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 74-14-06 PIPER: Amendment 39-1885. Applies to all Model PA-36-285 airplanes, S/N 36-7360001 through 36-7460016 certificated in all categories. Compliance required within the next 25 hours time in service after the effective date of this AD unless already accomplished. To preclude the possibility of having bolts installed in the wing spar carry through assembly which could be subject to deformation, accomplish the following: (a) Remove a total of four AN 4C-11A bolts and corresponding nuts and washers from the spar center section carry through left and right end vertical stiffeners. (b) Enlarge these four holes to 5/16" + .005 - .001 diameter. If the maximum hole size above does not eliminate evidence of elongation or wear, damaged parts should be replaced or further repaired in a method approved by the Chief, Engineering and Manufacturing Branch, FAA Southern Region. (c) Install an AN5-11A bolt, AN960-516L washer under bolt head, MS20365-524C nut and an AN960-516 washer under nut in each of the four holes. Torque to 100-140 inch pounds. Piper Service Bulletin No. 425 pertains to this same subject. This amendment becomes effective July 8, 1974. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_74-14-06.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 74-14-06 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Piper Model PA-36-285 Airplanes Subject: Wing Spar Status: Current Citation: This information is not available. Citation Publish Date: 07/05/1974 Effective Date: 07/08/1974 Make: Piper Aircraft Inc. Model: PA-36-285 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: 74-14-06 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-1885 AD NUMBER: 74-14-06 SUBJECT HEADING: Airworthiness Directives; Piper Model PA-36-285 Airplanes ACTION: SUMMARY: DATES: Effective July 8, 1974. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 74-14-06 PIPER: Amendment 39-1885. Applies to all Model PA-36-285 airplanes, S/N 36-7360001 through 36-7460016 certificated in all categories. Compliance required within the next 25 hours time in service after the effective date of this AD unless already accomplished. To preclude the possibility of having bolts installed in the wing spar carry through assembly which could be subject to deformation, accomplish the following: (a) Remove a total of four AN 4C-11A bolts and corresponding nuts and washers from the spar center section carry through left and right end vertical stiffeners. (b) Enlarge these four holes to 5/16" + .005 - .001 diameter. If the maximum hole size above does not eliminate evidence of elongation or wear, damaged parts should be replaced or further repaired in a method approved by the Chief, Engineering and Manufacturing Branch, FAA Southern Region. (c) Install an AN5-11A bolt, AN960-516L washer under bolt head, MS20365-524C nut and an AN960-516 washer under nut in each of the four holes. Torque to 100-140 inch pounds. Piper Service Bulletin No. 425 pertains to this same subject. This amendment becomes effective July 8, 1974. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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