AD 84-10-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Sikorsky Aircraft Corporation | S-76A | Airworthiness Directives; SIKORSKY AIRCRAFT Model S-76A Series Helicopters |
Unsafe Condition
Cracked main rotor spar due to operation with more than 600 hours time in service.
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Required Actions
Inspect the main rotor blade spar for cracks in accordance with the Sikorsky S-76 Composite Materials Manual, SA-4047-76-5, paragraph 2-7 or 2-7A. Replace the main rotor blade with a new or serviceable component before further flight if a spar crack is found.
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Compliance Time
within the next 25 hours time in service after the effective date of this AD, unless previously accomplished and thereafter at intervals not to exceed 500 hours time in service
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Affected Aircraft
Sikorsky Aircraft Corporation Model S-76A series helicopters with main rotor blades, Part Number 76150-09000 or 76150-09100, with more than 600 hours time in service
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Federal Register Abstract
Main Rotor Blade Spar
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_84-10-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 84-10-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; SIKORSKY AIRCRAFT Model S-76A Series Helicopters Subject: Main Rotor Blade Spar Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 06/18/1984 Make: Sikorsky Aircraft Corporation Model: S-76A Product Type: Aircraft Product Subtype: Rotorcraft Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 84-10-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-4802 AD NUMBER: 84-10-02 SUBJECT HEADING: Airworthiness Directives; SIKORSKY AIRCRAFT Model S-76A Series Helicopters ACTION: SUMMARY: DATES: ; Effective June 18, 1984. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 84-10-02 SIKORSKY AIRCRAFT: Amendment 39-4802. Applies to Model S-76A series helicopters certificated in all categories. To prevent operation with a cracked main rotor spar, accomplish the following: Applies to main rotor blades, Part Number (P/N) 76150-09000 or 76150-09100, with more than 600 hours time in service. Compliance required within the next 25 hours time in service after the effective date of this AD, unless previously accomplished and thereafter at intervals not to exceed 500 hours time in service. (a) Inspect the main rotor blade spar for cracks in accordance with the Sikorsky S-76 Composite Materials Manual, SA-4047-76-5, paragraph 2-7 or 2-7A. (b) If a spar crack is found, replace the main rotor blade with a new or serviceable component before further flight. (c) Paragraphs 2-7 and 2-7A of the Sikorsky S-76 Composite Materials Manual, that are specified in paragraph (a) of this AD, are 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, Division of United Technologies Corporation, North Main Street, Stratford, Connecticut 06602. These documents may also be examined at the FAA, New England Region, 12 New England Executive Park, Burlington, Massachusetts 01803, and at the Office of the Regional Counsel, FAA, Southwest Region, Fort Worth, Texas. (d) Upon request from the operator, an FAA maintenance inspector may adjust the repetitive inspection interval in this AD if the request contains data to justify the increase and provided the Manager, Boston Aircraft Certification Office, FAA, New England Region, approves the increase. This amendment supersedes Amendment 39-4019 (46 FR 3498), AD 80-23-51, that was effective January 15, 1981, for all persons except those to whom it was made effective by telegram dated November 7, 1980. This amendment becomes effective June 18, 1984. FOOTER:
Document Text
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AD Final Rules - DRS_84-10-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 84-10-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; SIKORSKY AIRCRAFT Model S-76A Series Helicopters Subject: Main Rotor Blade Spar Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 06/18/1984 Make: Sikorsky Aircraft Corporation Model: S-76A 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: 84-10-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-4802 AD NUMBER: 84-10-02 SUBJECT HEADING: Airworthiness Directives; SIKORSKY AIRCRAFT Model S-76A Series Helicopters ACTION: SUMMARY: DATES: ; Effective June 18, 1984. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 84-10-02 SIKORSKY AIRCRAFT: Amendment 39-4802. Applies to Model S-76A series helicopters certificated in all categories. To prevent operation with a cracked main rotor spar, accomplish the following: Applies to main rotor blades, Part Number (P/N) 76150-09000 or 76150-09100, with more than 600 hours time in service. Compliance required within the next 25 hours time in service after the effective date of this AD, unless previously accomplished and thereafter at intervals not to exceed 500 hours time in service. (a) Inspect the main rotor blade spar for cracks in accordance with the Sikorsky S-76 Composite Materials Manual, SA-4047-76-5, paragraph 2-7 or 2-7A. (b) If a spar crack is found, replace the main rotor blade with a new or serviceable component before further flight. (c) Paragraphs 2-7 and 2-7A of the Sikorsky S-76 Composite Materials Manual, that are specified in paragraph (a) of this AD, are 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, Division of United Technologies Corporation, North Main Street, Stratford, Connecticut 06602. These documents may also be examined at the FAA, New England Region, 12 New England Executive Park, Burlington, Massachusetts 01803, and at the Office of the Regional Counsel, FAA, Southwest Region, Fort Worth, Texas. (d) Upon request from the operator, an FAA maintenance inspector may adjust the repetitive inspection interval in this AD if the request contains data to justify the increase and provided the Manager, Boston Aircraft Certification Office, FAA, New England Region, approves the increase. This amendment supersedes Amendment 39-4019 (46 FR 3498), AD 80-23-51, that was effective January 15, 1981, for all persons except those to whom it was made effective by telegram dated November 7, 1980. This amendment becomes effective June 18, 1984. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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