AD 71-21-04
final rule
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Kelowna Flightcraft R & D Ltd. | 340 | Airworthiness Directives; GENERAL DYNAMICS Models 340, 440 and C- 131E Airplanes |
| aircraft | Kelowna Flightcraft R & D Ltd. | 440 | Airworthiness Directives; GENERAL DYNAMICS Models 340, 440 and C- 131E Airplanes |
| aircraft | Kelowna Flightcraft R & D Ltd. | Military C-131E | Airworthiness Directives; GENERAL DYNAMICS Models 340, 440 and C- 131E Airplanes |
Unsafe Condition
Failure of lockpins retaining the piston upper bearing and possible subsequent loss of the piston assembly from the main landing gear.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect piston upper bearing retaining lockpins on main landing gears with single or unknown lockpin configurations within 300 hours' time in service from the AD's effective date (or within last 1200 hours if already done) and every 1500 hours thereafter. For gears with more than a single lockpin configuration, inspect within 1000 hours' time in service (or within last 2000 hours if already done) and every 3000 hours thereafter. Replace loose or damaged lockpins before further flight. Inspections intervals may be extended to 8000 hours with approved rework or adjusted by FAA upon request.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Effective October 28, 1971
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
GENERAL DYNAMICS Models 340, 440, and C-131E Airplanes, including those using turbopropeller power.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Piston Bearing Lock Pins
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_71-21-04.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 71-21-04 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; GENERAL DYNAMICS Models 340, 440 and C- 131E Airplanes Subject: Piston Bearing Lock Pins Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 10/28/1971 Make: Kelowna Flightcraft R & D Ltd. Model: 340 | 440 | Military C-131E Product Type: Aircraft Product Subtype: Large 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: 71-21-04 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-1308 AD NUMBER: 71-21-04 SUBJECT HEADING: Airworthiness Directives; GENERAL DYNAMICS Models 340, 440 and C- 131E Airplanes ACTION: SUMMARY: DATES: Effective October 28, 1971. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 71-21-04 GENERAL DYNAMICS: Amdt. 39-1308. Applies to Models 340, 440 and C- 131E Airplanes including those using turbopropeller power. Compliance required as indicated. To prevent failure of lockpins retaining the piston upper bearing and possible subsequent loss of the piston assembly from the main landing gear, accomplish the following: (a) Within the next 300 hours' time in service from the effective date of this AD, unless already accomplished within the last 1200 hours' time in service, and at intervals not to exceed 1500 hours' time in service thereafter, inspect the piston upper bearing retaining lockpins on those main landing gears known to have a single lockpin configuration or unknown lockpin configuration. 1. If loose or damaged lockpin(s) are discovered, replace lockpins before further flight. 2. Aircraft may be flown per FAR 21.197 to a base for rework. (b) Within 1000 hours' time in service from the effective date of this AD, unless already accomplished within the last 2000 hours' time in service, and thereafter at intervals not to exceed 3000 hours' time in service, inspect the piston upper bearing retaining lockpins on those main landing gears known to have more than a single lockpin configuration. 1. If loose or damaged lockpin(s) are discovered, replace lockpins before further flight. 2. Aircraft may be flown per FAR 21.197 to a base for rework. (c) The repetitive inspection intervals in (a) and (b) may be extended to 8000 hours when rework has been accomplished per Paragraph 2B, General Dynamics/Convair Service Bulletin No. 32-5, dated 3 September 1971, or later FAA approved revision, or a rework approved by the Chief, Aircraft Engineering Division, FAA Western Region. (d) Upon request of the operator, an FAA Air Carrier Maintenance Inspector, subject to prior approval of the Chief, Aircraft Engineering Division, FAA Western Region, may adjust the repetitive inspection intervals specified in this AD to permit compliance at an established inspection period of the operator if the request contains substantiating data to justify the increase for that operator. This amendment becomes effective October 28, 1971. FOOTER:
Document Text
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AD Final Rules - DRS_71-21-04.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 71-21-04 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; GENERAL DYNAMICS Models 340, 440 and C- 131E Airplanes Subject: Piston Bearing Lock Pins Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 10/28/1971 Make: Kelowna Flightcraft R & D Ltd. Model: 340 | 440 | Military C-131E Product Type: Aircraft Product Subtype: Large 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: 71-21-04 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-1308 AD NUMBER: 71-21-04 SUBJECT HEADING: Airworthiness Directives; GENERAL DYNAMICS Models 340, 440 and C- 131E Airplanes ACTION: SUMMARY: DATES: Effective October 28, 1971. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 71-21-04 GENERAL DYNAMICS: Amdt. 39-1308. Applies to Models 340, 440 and C- 131E Airplanes including those using turbopropeller power. Compliance required as indicated. To prevent failure of lockpins retaining the piston upper bearing and possible subsequent loss of the piston assembly from the main landing gear, accomplish the following: (a) Within the next 300 hours' time in service from the effective date of this AD, unless already accomplished within the last 1200 hours' time in service, and at intervals not to exceed 1500 hours' time in service thereafter, inspect the piston upper bearing retaining lockpins on those main landing gears known to have a single lockpin configuration or unknown lockpin configuration. 1. If loose or damaged lockpin(s) are discovered, replace lockpins before further flight. 2. Aircraft may be flown per FAR 21.197 to a base for rework. (b) Within 1000 hours' time in service from the effective date of this AD, unless already accomplished within the last 2000 hours' time in service, and thereafter at intervals not to exceed 3000 hours' time in service, inspect the piston upper bearing retaining lockpins on those main landing gears known to have more than a single lockpin configuration. 1. If loose or damaged lockpin(s) are discovered, replace lockpins before further flight. 2. Aircraft may be flown per FAR 21.197 to a base for rework. (c) The repetitive inspection intervals in (a) and (b) may be extended to 8000 hours when rework has been accomplished per Paragraph 2B, General Dynamics/Convair Service Bulletin No. 32-5, dated 3 September 1971, or later FAA approved revision, or a rework approved by the Chief, Aircraft Engineering Division, FAA Western Region. (d) Upon request of the operator, an FAA Air Carrier Maintenance Inspector, subject to prior approval of the Chief, Aircraft Engineering Division, FAA Western Region, may adjust the repetitive inspection intervals specified in this AD to permit compliance at an established inspection period of the operator if the request contains substantiating data to justify the increase for that operator. This amendment becomes effective October 28, 1971. FOOTER:
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