AD 61-06-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | DC-8-11 | Airworthiness Directives; DOUGLAS All DC-8 Series Aircraft |
| aircraft | The Boeing Company | DC-8-12 | Airworthiness Directives; DOUGLAS All DC-8 Series Aircraft |
| aircraft | The Boeing Company | DC-8-21 | Airworthiness Directives; DOUGLAS All DC-8 Series Aircraft |
| aircraft | The Boeing Company | DC-8-31 | Airworthiness Directives; DOUGLAS All DC-8 Series Aircraft |
| aircraft | The Boeing Company | DC-8-32 | Airworthiness Directives; DOUGLAS All DC-8 Series Aircraft |
| aircraft | The Boeing Company | DC-8-33 | Airworthiness Directives; DOUGLAS All DC-8 Series Aircraft |
| aircraft | The Boeing Company | DC-8-41 | Airworthiness Directives; DOUGLAS All DC-8 Series Aircraft |
| aircraft | The Boeing Company | DC-8-42 | Airworthiness Directives; DOUGLAS All DC-8 Series Aircraft |
| aircraft | The Boeing Company | DC-8-43 | Airworthiness Directives; DOUGLAS All DC-8 Series Aircraft |
| aircraft | The Boeing Company | DC-8-51 | Airworthiness Directives; DOUGLAS All DC-8 Series Aircraft |
| aircraft | The Boeing Company | DC-8-52 | Airworthiness Directives; DOUGLAS All DC-8 Series Aircraft |
| aircraft | The Boeing Company | DC-8-53 | Airworthiness Directives; DOUGLAS All DC-8 Series Aircraft |
| aircraft | The Boeing Company | DC-8-55 | Airworthiness Directives; DOUGLAS All DC-8 Series Aircraft |
| aircraft | The Boeing Company | DC-8-61 | Airworthiness Directives; DOUGLAS All DC-8 Series Aircraft |
| aircraft | The Boeing Company | DC-8-61F | Airworthiness Directives; DOUGLAS All DC-8 Series Aircraft |
| aircraft | The Boeing Company | DC-8-62 | Airworthiness Directives; DOUGLAS All DC-8 Series Aircraft |
| aircraft | The Boeing Company | DC-8-62F | Airworthiness Directives; DOUGLAS All DC-8 Series Aircraft |
| aircraft | The Boeing Company | DC-8-63 | Airworthiness Directives; DOUGLAS All DC-8 Series Aircraft |
| aircraft | The Boeing Company | DC-8-63F | Airworthiness Directives; DOUGLAS All DC-8 Series Aircraft |
| aircraft | The Boeing Company | DC-8-71 | Airworthiness Directives; DOUGLAS All DC-8 Series Aircraft |
| aircraft | The Boeing Company | DC-8-71F | Airworthiness Directives; DOUGLAS All DC-8 Series Aircraft |
| aircraft | The Boeing Company | DC-8-72 | Airworthiness Directives; DOUGLAS All DC-8 Series Aircraft |
| aircraft | The Boeing Company | DC-8-72F | Airworthiness Directives; DOUGLAS All DC-8 Series Aircraft |
| aircraft | The Boeing Company | DC-8-73 | Airworthiness Directives; DOUGLAS All DC-8 Series Aircraft |
| aircraft | The Boeing Company | DC-8-73F | Airworthiness Directives; DOUGLAS All DC-8 Series Aircraft |
| aircraft | The Boeing Company | DC-8F-54 | Airworthiness Directives; DOUGLAS All DC-8 Series Aircraft |
| aircraft | The Boeing Company | DC-8F-55 | Airworthiness Directives; DOUGLAS All DC-8 Series Aircraft |
Unsafe Condition
Loosened rudder boost piston end assembly locknut P/N NAS 509-16 and improper installation or safetying of lockwasher P/N NAS 513-16, which may allow piston rotation out of proper position.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Visually inspect locknut P/N NAS 509-16 and lockwasher P/N NAS 513-16 for looseness, proper installation, and safetying. Ensure lockwasher is not installed backwards and tang engages piston end notch. Correct discrepancies per DC-8 Overhaul Manual and Douglas Alert Bulletin before further flight.
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Compliance Time
within the next 20 hours' time in service
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Affected Aircraft
Douglas DC-8 Series Aircraft including models DC-8-11, DC-8-12, DC-8-21, DC-8-31, DC-8-32, DC-8-33, DC-8-41, DC-8-42, DC-8-43, DC-8-51, and others as listed.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Rudder Boost Piston Locknut
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_61-06-05.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 61-06-05 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; DOUGLAS All DC-8 Series Aircraft Subject: Rudder Boost Piston Locknut Status: Current Citation: (Federal Register: March 23, 1961) Citation Publish Date: 03/23/1961 Effective Date: 03/23/1961 Make: The Boeing Company Model: DC-8-11 | DC-8-12 | DC-8-21 | DC-8-31 | DC-8-32 | DC-8-33 | DC-8-41 | DC-8-42 | DC-8-43 | DC-8-51 | ...Show more 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: AIRWORTHINESS DIRECTIVES FINAL RULES: 61-06-05 CITATION: [Federal Register: March 23, 1961] PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 61-06-05 SUBJECT HEADING: Airworthiness Directives; DOUGLAS All DC-8 Series Aircraft ACTION: SUMMARY: DATES: Effective March 23, 1961 ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 61-06-05 DOUGLAS: Amdt. 270 Part 507 Federal Register March 23, 1961. Applies to All DC-8 Series Aircraft. Compliance required within the next 20 hours' time in service, unless already accomplished in accordance with Douglas Alert Bulletin dated February 24, 1961. As a result of reported instances of loosened rudder boost piston end assembly locknut, the following must be accomplished. Refer to DC-8 Overhaul Manual, Chapter 27-19-2, page 18. Visually inspect for loose locknut P/N NAS 509-16 and proper installation and safetying to locknut of lockwasher P/N NAS 513-16. Insure that lockwasher is not installed backwards and that tang on lockwasher is engaged in notch in piston end and that piston has not rotated out of its proper position. If any discrepancies are found, they must be corrected in accordance with the DC-8 Overhaul Manual and Douglas Alert Bulletin dated February 24, 1961, prior to further flight. This directive becomes effective upon publication in the Federal Register for all person except those to whom it was made effective immediately by individual telegrams dated March 8, 1961. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_61-06-05.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 61-06-05 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; DOUGLAS All DC-8 Series Aircraft Subject: Rudder Boost Piston Locknut Status: Current Citation: (Federal Register: March 23, 1961) Citation Publish Date: 03/23/1961 Effective Date: 03/23/1961 Make: The Boeing Company Model: DC-8-11 | DC-8-12 | DC-8-21 | DC-8-31 | DC-8-32 | DC-8-33 | DC-8-41 | DC-8-42 | DC-8-43 | DC-8-51 | ...Show more 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: AIRWORTHINESS DIRECTIVES FINAL RULES: 61-06-05 CITATION: [Federal Register: March 23, 1961] PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 61-06-05 SUBJECT HEADING: Airworthiness Directives; DOUGLAS All DC-8 Series Aircraft ACTION: SUMMARY: DATES: Effective March 23, 1961 ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 61-06-05 DOUGLAS: Amdt. 270 Part 507 Federal Register March 23, 1961. Applies to All DC-8 Series Aircraft. Compliance required within the next 20 hours' time in service, unless already accomplished in accordance with Douglas Alert Bulletin dated February 24, 1961. As a result of reported instances of loosened rudder boost piston end assembly locknut, the following must be accomplished. Refer to DC-8 Overhaul Manual, Chapter 27-19-2, page 18. Visually inspect for loose locknut P/N NAS 509-16 and proper installation and safetying to locknut of lockwasher P/N NAS 513-16. Insure that lockwasher is not installed backwards and that tang on lockwasher is engaged in notch in piston end and that piston has not rotated out of its proper position. If any discrepancies are found, they must be corrected in accordance with the DC-8 Overhaul Manual and Douglas Alert Bulletin dated February 24, 1961, prior to further flight. This directive becomes effective upon publication in the Federal Register for all person except those to whom it was made effective immediately by individual telegrams dated March 8, 1961. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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