AD 64-02-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Twin Commander Aircraft LLC | 500-A | Airworthiness Directives; Aero Commander Model 500A, 500B, 560F, 680F and 680FL Aircraft |
| aircraft | Twin Commander Aircraft LLC | 500-B | Airworthiness Directives; Aero Commander Model 500A, 500B, 560F, 680F and 680FL Aircraft |
| aircraft | Twin Commander Aircraft LLC | 560-F | Airworthiness Directives; Aero Commander Model 500A, 500B, 560F, 680F and 680FL Aircraft |
| aircraft | Twin Commander Aircraft LLC | 680-FL | Airworthiness Directives; Aero Commander Model 500A, 500B, 560F, 680F and 680FL Aircraft |
| aircraft | Twin Commander Aircraft LLC | 680-F(P) | Airworthiness Directives; Aero Commander Model 500A, 500B, 560F, 680F and 680FL Aircraft |
Unsafe Condition
Loosened set screws and rotation of the upper retaining bearing on the main landing gear could cause gear extension exceeding 9.125±0.125 inches, leading to structural failure.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Within 25 hours' time in service after the effective date, inspect the main landing gear per Service Bulletin No. 83 Part I. If extension exceeds tolerance, modify both gears per Part II within 50 hours' time in service and stamp 'A' on data plates.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 25 hours' time in service after the effective date (inspection) and within 50 hours' time in service after the effective date (modification)
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Affected Aircraft
Aero Commander Models 500A, 500B, 560F, 680F, 680FL with serial numbers 871, 875, and 893 through 1329 excluding 916, 953, 1162, 1186, 1207, 1224, 1234, 1293, 1303, 1325, 1327, and 1328.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Main Landing Gear
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_64-02-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 64-02-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Aero Commander Model 500A, 500B, 560F, 680F and 680FL Aircraft Subject: Main Landing Gear Status: Current Citation: Federal Register: January 21, 1964 Citation Publish Date: 01/21/1964 Effective Date: 02/20/1964 Make: Twin Commander Aircraft LLC Model: 500-A | 500-B | 560-F | 680-FL | 680-F(P) 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: Updated RGL applicability to match AD applicability; CAR C-11-185 AIRWORTHINESS DIRECTIVES FINAL RULES: 64-02-01 CITATION: [Federal Register: January 21, 1964] PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 64-02-01 SUBJECT HEADING: Airworthiness Directives; Aero Commander Model 500A, 500B, 560F, 680F and 680FL Aircraft ACTION: SUMMARY: DATES: Effective February 20, 1964. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 64-02-01 AERO COMMANDER: Amdt. 676 Part 507 Federal Register January 21, 1964. Applies to Models 500A, 500B, 560F, 680F (Pressurized) and 680FL Aircraft Serial Numbers 871, 875, and 893 through 1329 Except Serial Numbers 916, 953, 1162, 1186, 1207, 1224, 1234, 1293, 1303, 1325, 1327, and 1328. Compliance required as indicated. To detect loosened set screws and to preclude rotation of the upper retaining bearing on the main landing gear accomplish the following: (a) Within 25 hours' time in service after the effective date of this AD, inspect the main landing gear in accordance with Part I of Aero Commander Service Bulletin No. 83 dated September 13, 1963, or FAA approved equivalent. If the extension of either gear exceeds 9.125 plus or minus 0.125 inches, accomplish the modification specified in (b) for both main landing gears before further flight. (b) Within 50 hours' time in service after the effective date of this AD, modify the landing gear in accordance with Part II of Aero Commander Service Bulletin No. 83 dated September 13, 1963, or FAA approved equivalent. Stamp the letter "A" after the design number on each landing gear data plate after the modification is made. This directive effective February 20, 1964. FOOTER:
Document Text
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AD Final Rules - DRS_64-02-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 64-02-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Aero Commander Model 500A, 500B, 560F, 680F and 680FL Aircraft Subject: Main Landing Gear Status: Current Citation: Federal Register: January 21, 1964 Citation Publish Date: 01/21/1964 Effective Date: 02/20/1964 Make: Twin Commander Aircraft LLC Model: 500-A | 500-B | 560-F | 680-FL | 680-F(P) 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: Updated RGL applicability to match AD applicability; CAR C-11-185 AIRWORTHINESS DIRECTIVES FINAL RULES: 64-02-01 CITATION: [Federal Register: January 21, 1964] PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 64-02-01 SUBJECT HEADING: Airworthiness Directives; Aero Commander Model 500A, 500B, 560F, 680F and 680FL Aircraft ACTION: SUMMARY: DATES: Effective February 20, 1964. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 64-02-01 AERO COMMANDER: Amdt. 676 Part 507 Federal Register January 21, 1964. Applies to Models 500A, 500B, 560F, 680F (Pressurized) and 680FL Aircraft Serial Numbers 871, 875, and 893 through 1329 Except Serial Numbers 916, 953, 1162, 1186, 1207, 1224, 1234, 1293, 1303, 1325, 1327, and 1328. Compliance required as indicated. To detect loosened set screws and to preclude rotation of the upper retaining bearing on the main landing gear accomplish the following: (a) Within 25 hours' time in service after the effective date of this AD, inspect the main landing gear in accordance with Part I of Aero Commander Service Bulletin No. 83 dated September 13, 1963, or FAA approved equivalent. If the extension of either gear exceeds 9.125 plus or minus 0.125 inches, accomplish the modification specified in (b) for both main landing gears before further flight. (b) Within 50 hours' time in service after the effective date of this AD, modify the landing gear in accordance with Part II of Aero Commander Service Bulletin No. 83 dated September 13, 1963, or FAA approved equivalent. Stamp the letter "A" after the design number on each landing gear data plate after the modification is made. This directive effective February 20, 1964. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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