AD 74-07-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | MD Helicopters, Inc. | 369A | Airworthiness Directives; Hughes Models 369A, 369H, 369HE, 369HS and 369HM Helicopters |
| aircraft | MD Helicopters, Inc. | 369H | Airworthiness Directives; Hughes Models 369A, 369H, 369HE, 369HS and 369HM Helicopters |
| aircraft | MD Helicopters, Inc. | 369HE | Airworthiness Directives; Hughes Models 369A, 369H, 369HE, 369HS and 369HM Helicopters |
| aircraft | MD Helicopters, Inc. | 369HM | Airworthiness Directives; Hughes Models 369A, 369H, 369HE, 369HS and 369HM Helicopters |
| aircraft | MD Helicopters, Inc. | 369HS | Airworthiness Directives; Hughes Models 369A, 369H, 369HE, 369HS and 369HM Helicopters |
Unsafe Condition
Mismatched aluminum tail rotor blade serial numbers (P/N 369A1613-3 serial numbers 0001 through 0156 mated with blade serial numbers 0157 and subsequent) could result in tail rotor failure.
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Required Actions
Inspect the tail rotor assembly to verify blade serial numbers are not mismatched. Replace mismatched tail rotor blades before further flight. Note the AD inspection in Aircraft Maintenance Records.
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Compliance Time
before further flight
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Affected Aircraft
Hughes Models 369A, 369H, 369HE, 369HS, and 369HM helicopters equipped with aluminum tail rotor blade P/N 369A1613-3, all serial numbers.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Aluminum Tail Rotor Blades
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_74-07-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 74-07-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Hughes Models 369A, 369H, 369HE, 369HS and 369HM Helicopters Subject: Aluminum Tail Rotor Blades Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 03/26/1974 Make: MD Helicopters, Inc. Model: 369A | 369H | 369HE | 369HM | 369HS Product Type: Aircraft Product Subtype: Rotorcraft Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 74-07-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-1802 AD NUMBER: 74-07-02 SUBJECT HEADING: Airworthiness Directives; Hughes Models 369A, 369H, 369HE, 369HS and 369HM Helicopters ACTION: SUMMARY: DATES: Effective March 26, 1974 for all persons except those to whom it was made effective by airmail letter, dated February 25, 1974, which contained this amendment. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 74-07-02 HUGHES: Amendment 39-1802. Applies to Hughes Models 369A, 369H, 369HE, 369HS and 369HM Helicopters certificated in all categories. "Pursuant to the authority of the Federal Aviation Act of 1958, delegated to me by the Administrator, the following airworthiness directive applicable to operators of Hughes Model 369A, 369H, 369HE, 369HS and 369HM Helicopters, equipped with aluminum tail rotor blade P/N 369A1613-3, certificated in all categories is effective immediately upon receipt of this airmail letter. Before further flight, unless already accomplished, and upon any installation or replacement of aluminum tail rotor blade P/N 369A1613-3, inspect the tail rotor assembly to verify that the rotor blade P/N 369A1613-3 serial numbers 0001 through 0156 are not mated with blade serial numbers 0157 and subsequent. Replace mismatched tail rotor blade(s) before further flight. Note AD inspection in Aircraft Maintenance Records. Forthcoming Service Bulletin, No. HN-65 covers the same subject." This amendment is effective March 26, 1974 for all persons except those to whom it was made effective by airmail letter, dated February 25, 1974, which contained this amendment. FOOTER:
Document Text
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AD Final Rules - DRS_74-07-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 74-07-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Hughes Models 369A, 369H, 369HE, 369HS and 369HM Helicopters Subject: Aluminum Tail Rotor Blades Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 03/26/1974 Make: MD Helicopters, Inc. Model: 369A | 369H | 369HE | 369HM | 369HS 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: 74-07-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-1802 AD NUMBER: 74-07-02 SUBJECT HEADING: Airworthiness Directives; Hughes Models 369A, 369H, 369HE, 369HS and 369HM Helicopters ACTION: SUMMARY: DATES: Effective March 26, 1974 for all persons except those to whom it was made effective by airmail letter, dated February 25, 1974, which contained this amendment. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 74-07-02 HUGHES: Amendment 39-1802. Applies to Hughes Models 369A, 369H, 369HE, 369HS and 369HM Helicopters certificated in all categories. "Pursuant to the authority of the Federal Aviation Act of 1958, delegated to me by the Administrator, the following airworthiness directive applicable to operators of Hughes Model 369A, 369H, 369HE, 369HS and 369HM Helicopters, equipped with aluminum tail rotor blade P/N 369A1613-3, certificated in all categories is effective immediately upon receipt of this airmail letter. Before further flight, unless already accomplished, and upon any installation or replacement of aluminum tail rotor blade P/N 369A1613-3, inspect the tail rotor assembly to verify that the rotor blade P/N 369A1613-3 serial numbers 0001 through 0156 are not mated with blade serial numbers 0157 and subsequent. Replace mismatched tail rotor blade(s) before further flight. Note AD inspection in Aircraft Maintenance Records. Forthcoming Service Bulletin, No. HN-65 covers the same subject." This amendment is effective March 26, 1974 for all persons except those to whom it was made effective by airmail letter, dated February 25, 1974, which contained this amendment. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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