AD 86-19-14
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Sikorsky Aircraft Corporation | S-76A | Airworthiness Directives; SIKORSKY AIRCRAFT Model S-76A and S-76B Helicopters |
| aircraft | Sikorsky Aircraft Corporation | S-76B | Airworthiness Directives; SIKORSKY AIRCRAFT Model S-76A and S-76B Helicopters |
Unsafe Condition
The use of improperly manufactured tail rotor assemblies/spars could result in possible operation with an unsafe tail rotor assembly.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Remove the listed serial numbered tail rotor assemblies/spars and replace with serviceable parts. Aircraft may be ferried under FAR Sections 21.197 and 21.199 to a base for AD compliance. Alternate means of compliance may be approved upon request.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Prior to further flight after receipt of this AD
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Affected Aircraft
Sikorsky Aircraft Corporation Model S-76A (serial numbers A1 37-00766, -00774, -00775, -00779, -00781, -00783, and -00785) and S-76B (serial numbers A245-00025, -00026, -00027, -00028, -00037, -00040, -00041, and -00047) helicopters equipped with specified tail rotor blade assemblies (part numbers 76101-05001, 76101-05101 for S-76A and 76101-05501 for S-76B).
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Tail Rotor Assembly
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_86-19-14.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 86-19-14 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; SIKORSKY AIRCRAFT Model S-76A and S-76B Helicopters Subject: Tail Rotor Assembly Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 01/30/1987 Make: Sikorsky Aircraft Corporation Model: S-76A | S-76B Product Type: Aircraft Product Subtype: Rotorcraft Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 86-19-14 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-5505 AD NUMBER: 86-19-14 SUBJECT HEADING: Airworthiness Directives; SIKORSKY AIRCRAFT Model S-76A and S-76B Helicopters ACTION: SUMMARY: DATES: Effective January 30, 1987. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 86-19-14 SIKORSKY AIRCRAFT: Amendment 39-5505. Applies to all Model S-76A and S-76B helicopters, certificated in any category, equipped with tail rotor blade assemblies as follows: MODEL PART NUMBERS SERIAL NUMBERS S-76A 76101-05001 or A1 37-00766, -00774, -00775, 76101-05101 -00779,-00781, -00783, and -00785 S-76B 76101-05501 A245-00025, -00026, -00027, -00028, -00037, -00040, -00041, and -00047 Compliance is required as indicated, unless already accomplished. To prevent possible operation with an improperly manufactured tail rotor assembly, accomplish the following: (a) Prior to further flight after receipt of this AD, remove the above listed serial numbered tail rotor assemblies/spars, and replace with a serviceable part. The above listed serial numbered tail rotor assemblies/spars marked with the suffix (X) are serviceable parts. (b) Aircraft may be ferried in accordance with the provisions of FAR Sections 21.197 and 21.199 to a base where the requirements of this AD may be accomplished. (c) Upon request, an alternate means of compliance which provides an equivalent level of safety with the requirements of this AD may be approved by the Manager, Boston Aircraft Certification Office, New England Region, Federal Aviation Administration, 12 New England Executive Park, Burlington, Massachusetts 01803, telephone (617) 273-7118. (d) Upon submission of substantiating data by an owner or operator, through an FAA maintenance inspector, the Manager, Boston Aircraft Certification Office, New England Region, Federal Aviation Administration, 12 New England Executive Park, Burlington, Massachusetts 01803, telephone (617) 273-7118, may adjust the compliance time specified in this AD. This amendment becomes effective January 30, 1987, as to all persons except those persons to whom it was made immediately effective by individual priority letter AD No. 86-19-l4 issued September 23, 1986, which contained this amendment. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_86-19-14.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 86-19-14 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; SIKORSKY AIRCRAFT Model S-76A and S-76B Helicopters Subject: Tail Rotor Assembly Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 01/30/1987 Make: Sikorsky Aircraft Corporation Model: S-76A | S-76B 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: 86-19-14 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-5505 AD NUMBER: 86-19-14 SUBJECT HEADING: Airworthiness Directives; SIKORSKY AIRCRAFT Model S-76A and S-76B Helicopters ACTION: SUMMARY: DATES: Effective January 30, 1987. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 86-19-14 SIKORSKY AIRCRAFT: Amendment 39-5505. Applies to all Model S-76A and S-76B helicopters, certificated in any category, equipped with tail rotor blade assemblies as follows: MODEL PART NUMBERS SERIAL NUMBERS S-76A 76101-05001 or A1 37-00766, -00774, -00775, 76101-05101 -00779,-00781, -00783, and -00785 S-76B 76101-05501 A245-00025, -00026, -00027, -00028, -00037, -00040, -00041, and -00047 Compliance is required as indicated, unless already accomplished. To prevent possible operation with an improperly manufactured tail rotor assembly, accomplish the following: (a) Prior to further flight after receipt of this AD, remove the above listed serial numbered tail rotor assemblies/spars, and replace with a serviceable part. The above listed serial numbered tail rotor assemblies/spars marked with the suffix (X) are serviceable parts. (b) Aircraft may be ferried in accordance with the provisions of FAR Sections 21.197 and 21.199 to a base where the requirements of this AD may be accomplished. (c) Upon request, an alternate means of compliance which provides an equivalent level of safety with the requirements of this AD may be approved by the Manager, Boston Aircraft Certification Office, New England Region, Federal Aviation Administration, 12 New England Executive Park, Burlington, Massachusetts 01803, telephone (617) 273-7118. (d) Upon submission of substantiating data by an owner or operator, through an FAA maintenance inspector, the Manager, Boston Aircraft Certification Office, New England Region, Federal Aviation Administration, 12 New England Executive Park, Burlington, Massachusetts 01803, telephone (617) 273-7118, may adjust the compliance time specified in this AD. This amendment becomes effective January 30, 1987, as to all persons except those persons to whom it was made immediately effective by individual priority letter AD No. 86-19-l4 issued September 23, 1986, which contained this amendment. FOOTER:
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Retrieved: Apr 8, 2026
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