AD 78-05-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Sikorsky Aircraft Corporation | S-61N | Airworthiness Directives; Sikorsky Model S-61N Rotorcraft |
Unsafe Condition
Inadvertent landing gear retraction due to insufficient protection in the main landing gear electrical system.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Modify the main landing gear electrical system in accordance with Sikorsky Service Bulletin 61B55-40 or later FAA approved revision.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within the next 300 hours time in service after the effective date of this AD
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Affected Aircraft
Sikorsky Model S-61N rotorcraft prior to and including Sikorsky Serial No. 61805.
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_78-05-07.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 78-05-07 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Sikorsky Model S-61N Rotorcraft Subject: Main Landing Gear Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 04/13/1978 Make: Sikorsky Aircraft Corporation Model: S-61N Product Type: Aircraft Product Subtype: Rotorcraft Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 78-05-07 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-3147 AD NUMBER: 78-05-07 SUBJECT HEADING: Airworthiness Directives; Sikorsky Model S-61N Rotorcraft ACTION: SUMMARY: DATES: Effective April 13, 1978. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 78-05-07 SIKORSKY: Amendment 39-3147. Applies to Model S-61N rotorcraft prior to and including Sikorsky Serial No. 61805. Compliance required within the next 300 hours time in service after the effective date of this AD, unless already accomplished. To prevent inadvertent landing gear retraction, modify the main landing gear electrical system in accordance with Sikorsky Service Bulletin 61B55-40 or later FAA approved revision. The manufacturer's service bulletin identified and described in this directive is incorporated herein and made a part hereof pursuant to 5 U.S.C. 552(a)(1). All persons affected by this directive who have not already received these documents from the manufacturer may obtain copies upon request to Sikorsky Aircraft, Commercial Customer Service, Stratford, Connecticut 06602. These documents may also be examined at the Office of the Regional Counsel, New England Region, Federal Aviation Administration, 12 New England Executive Park, Burlington, Massachusetts 01803. This amendment becomes effective April 13, 1978. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_78-05-07.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 78-05-07 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Sikorsky Model S-61N Rotorcraft Subject: Main Landing Gear Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 04/13/1978 Make: Sikorsky Aircraft Corporation Model: S-61N Product Type: Aircraft Product Subtype: Rotorcraft Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 78-05-07 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-3147 AD NUMBER: 78-05-07 SUBJECT HEADING: Airworthiness Directives; Sikorsky Model S-61N Rotorcraft ACTION: SUMMARY: DATES: Effective April 13, 1978. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 78-05-07 SIKORSKY: Amendment 39-3147. Applies to Model S-61N rotorcraft prior to and including Sikorsky Serial No. 61805. Compliance required within the next 300 hours time in service after the effective date of this AD, unless already accomplished. To prevent inadvertent landing gear retraction, modify the main landing gear electrical system in accordance with Sikorsky Service Bulletin 61B55-40 or later FAA approved revision. The manufacturer's service bulletin identified and described in this directive is incorporated herein and made a part hereof pursuant to 5 U.S.C. 552(a)(1). All persons affected by this directive who have not already received these documents from the manufacturer may obtain copies upon request to Sikorsky Aircraft, Commercial Customer Service, Stratford, Connecticut 06602. These documents may also be examined at the Office of the Regional Counsel, New England Region, Federal Aviation Administration, 12 New England Executive Park, Burlington, Massachusetts 01803. This amendment becomes effective April 13, 1978. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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