AD 70-09-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Sikorsky Aircraft Corporation | S-61A | Airworthiness Directives; Sikorsky Model S-61 Type Helicopters |
| aircraft | Sikorsky Aircraft Corporation | S-61D | Airworthiness Directives; Sikorsky Model S-61 Type Helicopters |
| aircraft | Sikorsky Aircraft Corporation | S-61E | Airworthiness Directives; Sikorsky Model S-61 Type Helicopters |
| aircraft | Sikorsky Aircraft Corporation | S-61L | Airworthiness Directives; Sikorsky Model S-61 Type Helicopters |
| aircraft | Sikorsky Aircraft Corporation | S-61N | Airworthiness Directives; Sikorsky Model S-61 Type Helicopters |
| aircraft | Sikorsky Aircraft Corporation | S-61NM | Airworthiness Directives; Sikorsky Model S-61 Type Helicopters |
| aircraft | Sikorsky Aircraft Corporation | S-61R | Airworthiness Directives; Sikorsky Model S-61 Type Helicopters |
| aircraft | Sikorsky Aircraft Corporation | S-61V | Airworthiness Directives; Sikorsky Model S-61 Type Helicopters |
Unsafe Condition
Failure of P/N S6135-66649 and S6137-66704 series tail gear box pitch beams
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Within the next 10 days or 25 hours in service, whichever occurs first, and thereafter at intervals not exceeding 90 days or 240 hours in service, perform inspections of the bore area of the pitch beam per Sikorsky Service Bulletin 61B35-7 or equivalent method. If a crack is found, remove the pitch beam from service prior to further flight.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within the next 10 days or 25 hours in service, whichever occurs first after the effective date of this AD
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Sikorsky Model S-61A, S-61D, S-61E, S-61L, S-61N, S-61NM, S-61R, S-61V helicopters
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Tail Gear Box Pitch Beams
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_70-09-03.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 70-09-03 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Sikorsky Model S-61 Type Helicopters Subject: Tail Gear Box Pitch Beams Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 05/08/1970 Make: Sikorsky Aircraft Corporation Model: S-61A | S-61D | S-61E | S-61L | S-61N | S-61NM | S-61R | S-61V 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: 70-09-03 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-980 AD NUMBER: 70-09-03 SUBJECT HEADING: Airworthiness Directives; Sikorsky Model S-61 Type Helicopters ACTION: SUMMARY: DATES: Effective May 8, 1970. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 70-09-03 SIKORSKY: Amdt. 39-980. Applies to S-61 Type Helicopters. To prevent failure of P/N S6135-66649 and S6137-66704 series tail gear box pitch beams accomplish the following: (a) Within the next 10 days or 25 hours in service, whichever occurs first after the effective date of this AD, unless already accomplished, and thereafter at intervals not to exceed 90 days or 240 hours in service, whichever occurs first, from the last inspection perform the inspections of the bore area of the pitch beam in accordance with Sikorsky Service Bulletin No. 61B35-7 dated 12 February 1970 or later revisions or an equivalent method approved by the Chief, Engineering and Manufacturing Branch, FAA Eastern Region. If a crack is found, remove the pitch beam from service prior to further flight. This amendment is effective May 8, 1970. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_70-09-03.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 70-09-03 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Sikorsky Model S-61 Type Helicopters Subject: Tail Gear Box Pitch Beams Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 05/08/1970 Make: Sikorsky Aircraft Corporation Model: S-61A | S-61D | S-61E | S-61L | S-61N | S-61NM | S-61R | S-61V 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: 70-09-03 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-980 AD NUMBER: 70-09-03 SUBJECT HEADING: Airworthiness Directives; Sikorsky Model S-61 Type Helicopters ACTION: SUMMARY: DATES: Effective May 8, 1970. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 70-09-03 SIKORSKY: Amdt. 39-980. Applies to S-61 Type Helicopters. To prevent failure of P/N S6135-66649 and S6137-66704 series tail gear box pitch beams accomplish the following: (a) Within the next 10 days or 25 hours in service, whichever occurs first after the effective date of this AD, unless already accomplished, and thereafter at intervals not to exceed 90 days or 240 hours in service, whichever occurs first, from the last inspection perform the inspections of the bore area of the pitch beam in accordance with Sikorsky Service Bulletin No. 61B35-7 dated 12 February 1970 or later revisions or an equivalent method approved by the Chief, Engineering and Manufacturing Branch, FAA Eastern Region. If a crack is found, remove the pitch beam from service prior to further flight. This amendment is effective May 8, 1970. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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