AD 74-17-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Columbia Helicopters, Inc. | 107-II | Airworthiness Directives; VERTOL Model 107-II type Helicopters |
Unsafe Condition
Failure of the rotor blade inspection system could result in blade separation or structural failure of the rotor blades.
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Required Actions
Initiate an approved rotor blade inspection program prior to the next flight after August 13, 1974. The program must include inspections and maintenance per Boeing Vertol Service Bulletin 107-329 or later FAA-approved revisions, with pilot-performed visual checks of the rotor blade pressure indicators.
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Compliance Time
prior to the next flight after the effective date of this AD (August 13, 1974)
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Affected Aircraft
VERTOL Model 107-II type helicopters certificated in all categories.
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Federal Register Abstract
Rotor Blade Inspection System
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_74-17-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 74-17-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; VERTOL Model 107-II type Helicopters Subject: Rotor Blade Inspection System Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 08/13/1974 Make: Columbia Helicopters, Inc. Model: 107-II Product Type: Aircraft Product Subtype: Rotorcraft Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 74-17-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-1915 AD NUMBER: 74-17-02 SUBJECT HEADING: Airworthiness Directives; VERTOL Model 107-II type Helicopters ACTION: SUMMARY: DATES: Effective August 13, 1974. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 74-17-02 VERTOL: Amendment 39-1915. Applies to Vertol Model 107-II type helicopters certificated in all categories. 1. Prior to the next flight after the effective date of this AD, unless already accomplished, an inspection program for the rotor blades which has been approved by the Chief, Engineering and Manufacturing Branch, FAA, Eastern Region, subsequent to March 28, 1974 must be initiated. 2. An acceptable program is one afforded by forward and aft rotor blades altered, inspected and maintained in accordance with Boeing Vertol Service Bulletin 107-329 or later FAA approved revisions. The visual checks of the rotor blade pressure indicator required by paragraph 2 of this AD may be performed by the pilot. This amendment is effective August 13, 1974. FOOTER:
Document Text
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AD Final Rules - DRS_74-17-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 74-17-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; VERTOL Model 107-II type Helicopters Subject: Rotor Blade Inspection System Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 08/13/1974 Make: Columbia Helicopters, Inc. Model: 107-II 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: 74-17-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-1915 AD NUMBER: 74-17-02 SUBJECT HEADING: Airworthiness Directives; VERTOL Model 107-II type Helicopters ACTION: SUMMARY: DATES: Effective August 13, 1974. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 74-17-02 VERTOL: Amendment 39-1915. Applies to Vertol Model 107-II type helicopters certificated in all categories. 1. Prior to the next flight after the effective date of this AD, unless already accomplished, an inspection program for the rotor blades which has been approved by the Chief, Engineering and Manufacturing Branch, FAA, Eastern Region, subsequent to March 28, 1974 must be initiated. 2. An acceptable program is one afforded by forward and aft rotor blades altered, inspected and maintained in accordance with Boeing Vertol Service Bulletin 107-329 or later FAA approved revisions. The visual checks of the rotor blade pressure indicator required by paragraph 2 of this AD may be performed by the pilot. This amendment is effective August 13, 1974. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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