AD 60-24-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Sikorsky Aircraft Corporation | S-58A | Airworthiness Directives; Sikorsky All Model S-58 Helicopters |
| aircraft | Sikorsky Aircraft Corporation | S-58B | Airworthiness Directives; Sikorsky All Model S-58 Helicopters |
| aircraft | Sikorsky Aircraft Corporation | S-58BT | Airworthiness Directives; Sikorsky All Model S-58 Helicopters |
| aircraft | Sikorsky Aircraft Corporation | S-58C | Airworthiness Directives; Sikorsky All Model S-58 Helicopters |
| aircraft | Sikorsky Aircraft Corporation | S-58D | Airworthiness Directives; Sikorsky All Model S-58 Helicopters |
| aircraft | Sikorsky Aircraft Corporation | S-58DT | Airworthiness Directives; Sikorsky All Model S-58 Helicopters |
| aircraft | Sikorsky Aircraft Corporation | S-58E | Airworthiness Directives; Sikorsky All Model S-58 Helicopters |
| aircraft | Sikorsky Aircraft Corporation | S-58ET | Airworthiness Directives; Sikorsky All Model S-58 Helicopters |
| aircraft | Sikorsky Aircraft Corporation | S-58F | Airworthiness Directives; Sikorsky All Model S-58 Helicopters |
| aircraft | Sikorsky Aircraft Corporation | S-58FT | Airworthiness Directives; Sikorsky All Model S-58 Helicopters |
| aircraft | Sikorsky Aircraft Corporation | S-58G | Airworthiness Directives; Sikorsky All Model S-58 Helicopters |
| aircraft | Sikorsky Aircraft Corporation | S-58H | Airworthiness Directives; Sikorsky All Model S-58 Helicopters |
| aircraft | Sikorsky Aircraft Corporation | S-58HT | Airworthiness Directives; Sikorsky All Model S-58 Helicopters |
| aircraft | Sikorsky Aircraft Corporation | S-58J | Airworthiness Directives; Sikorsky All Model S-58 Helicopters |
| aircraft | Sikorsky Aircraft Corporation | S-58JT | Airworthiness Directives; Sikorsky All Model S-58 Helicopters |
Unsafe Condition
Breakage of the cable connected to the L(plus) terminal of Eclipse Pioneer Voltage Regulator P/N 1597-1, resulting in complete loss of electrical power and excessive battery fumes.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Remove existing clamp securing voltage regulator cables to the airframe 12 inches from the regulator base; install cable clamp MS 21919DG5 or equivalent to secure cables to regulator base using an existing hole, ensuring cable slack relieves terminal lug tension without altering routing; add additional clamp if unsupported cable length remains beyond the regulator, ensuring regulator shockmount motion is not restricted.
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Compliance Time
within the next 50 hours' time in service after effective date
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Affected Aircraft
Sikorsky S-58A, S-58B, S-58BT, S-58C, S-58D, S-58DT, S-58E, S-58ET, S-58F, S-58FT, S-58G, S-58H helicopters
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Electrical Cable
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_60-24-04.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 60-24-04 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Sikorsky All Model S-58 Helicopters Subject: Electrical Cable Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 11/28/1960 Make: Sikorsky Aircraft Corporation Model: S-58A | S-58B | S-58BT | S-58C | S-58D | S-58DT | S-58E | S-58ET | S-58F | S-58FT | S-58G | S-58H | ...Show more 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: 60-24-04 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 60-24-04 SUBJECT HEADING: Airworthiness Directives; Sikorsky All Model S-58 Helicopters ACTION: SUMMARY: DATES: Effective November 28, 1960. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 60-24-04 SIKORSKY: Amdt. 221 Part 507 Federal Register November 11, 1960. Applies to All S-58 Helicopters. Compliance required within the next 50 hours' time in service after effective date. Complete loss of electrical power and excessive battery fumes have resulted from the breakage of the cable connected to the L(plus) terminal of Eclipse Pioneer Voltage Regulator P/N 1597-1. In order to preclude the breakage of the L(plus) cable and the resulting loss of electrical power, the following is required unless already accomplished: (a) Remove the existing clamp securing the voltage regulator cables to the airframe at a distance of approximately 12 inches from the regulator base. (b) Install cable clamp MS 21919DG5, or equivalent, to secure the regulator cables to the regulator base utilizing an existing hole in the corner of the regulator base. This should be accomplished while providing enough cable slack to relieve tension on the terminal lugs but without changing the cable routing. (c) If, in some installations, there is an unduly long length of unsupported cable existing beyond the voltage regulator after compliance with (a) and (b), an additional clamp of the same type should be provided to attach the cable to the airframe with care being exercised so that the motion of the regulator on its shockmount is not restricted. (Sikorsky Service Bulletin No. 58B55-1 covers this same subject.) This directive effective November 28, 1960. FOOTER:
Document Text
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AD Final Rules - DRS_60-24-04.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 60-24-04 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Sikorsky All Model S-58 Helicopters Subject: Electrical Cable Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 11/28/1960 Make: Sikorsky Aircraft Corporation Model: S-58A | S-58B | S-58BT | S-58C | S-58D | S-58DT | S-58E | S-58ET | S-58F | S-58FT | S-58G | S-58H | ...Show more 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: 60-24-04 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 60-24-04 SUBJECT HEADING: Airworthiness Directives; Sikorsky All Model S-58 Helicopters ACTION: SUMMARY: DATES: Effective November 28, 1960. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 60-24-04 SIKORSKY: Amdt. 221 Part 507 Federal Register November 11, 1960. Applies to All S-58 Helicopters. Compliance required within the next 50 hours' time in service after effective date. Complete loss of electrical power and excessive battery fumes have resulted from the breakage of the cable connected to the L(plus) terminal of Eclipse Pioneer Voltage Regulator P/N 1597-1. In order to preclude the breakage of the L(plus) cable and the resulting loss of electrical power, the following is required unless already accomplished: (a) Remove the existing clamp securing the voltage regulator cables to the airframe at a distance of approximately 12 inches from the regulator base. (b) Install cable clamp MS 21919DG5, or equivalent, to secure the regulator cables to the regulator base utilizing an existing hole in the corner of the regulator base. This should be accomplished while providing enough cable slack to relieve tension on the terminal lugs but without changing the cable routing. (c) If, in some installations, there is an unduly long length of unsupported cable existing beyond the voltage regulator after compliance with (a) and (b), an additional clamp of the same type should be provided to attach the cable to the airframe with care being exercised so that the motion of the regulator on its shockmount is not restricted. (Sikorsky Service Bulletin No. 58B55-1 covers this same subject.) This directive effective November 28, 1960. FOOTER:
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