AD 62-24-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 707-100 Long Body | BOEING 707/720 Airplanes |
| aircraft | The Boeing Company | 707-100B Long Body | BOEING 707/720 Airplanes |
| aircraft | The Boeing Company | 707-100B Short Body | BOEING 707/720 Airplanes |
| aircraft | The Boeing Company | 707-200 | BOEING 707/720 Airplanes |
| aircraft | The Boeing Company | 707-300 Series | BOEING 707/720 Airplanes |
| aircraft | The Boeing Company | 707-300B Series | BOEING 707/720 Airplanes |
| aircraft | The Boeing Company | 707-300C Series | BOEING 707/720 Airplanes |
| aircraft | The Boeing Company | 707-400 Series | BOEING 707/720 Airplanes |
| aircraft | The Boeing Company | 720 Series | BOEING 707/720 Airplanes |
| aircraft | The Boeing Company | 720B Series | BOEING 707/720 Airplanes |
Unsafe Condition
Hydraulic system motor operated valves, Whittaker P/N 146505-1, have failed in service due to stress corrosion in the end cover retaining nut, with all failures occurring in parts with the original heat treatment.
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Required Actions
Modify all valves by installing new end covers and nuts with blue anodized color; replace valve shear seals and bearing with new longer seals and a new bearing.
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Compliance Time
within 350 hours of airplane time in service after the effective date of this directive
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Affected Aircraft
Boeing 707/720 airplanes with serial numbers 18385-18397, 18400-18404, 18374, 18414-18419, 18411, 18372, 18373, 18335-18339, 18079-18082, 18423-18425, 18376, 18377, 18451-18453; also airplanes modified with Motor Operated Valves per Boeing Service Bulletins 1414, 1483, 1484, 1489, 1490, 1491, 1492, or 1493.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Hydraulic System Motor Operated Valves
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_62-24-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 62-24-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: BOEING 707/720 Airplanes Subject: Hydraulic System Motor Operated Valves Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 11/10/1962 Make: The Boeing Company Model: 707-100 Long Body | 707-100B Long Body | 707-100B Short Body | 707-200 | 707-300 Series | 707-300B S...Show more Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 62-24-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 62-24-02 SUBJECT HEADING: BOEING 707/720 Airplanes ACTION: SUMMARY: DATES: Effective November 10, 1962. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 62-24-02 BOEING: Amdt. 506 Part 507 Federal Register November 10, 1962. Applies to 707/720 Airplanes, Serial Nos. 18385-18397, 18400-18404, 18374, 18414-18419, 18411, 18372, 18373, 18335-18339, 18079-18082, 18423-18425, 18376, 18377, 18451-18453 Inclusive; Also Applies to Airplanes Which Have Been Modified By Operators to Incorporate Motor Operated Valves Per Boeing Service Bulletins 1414, 1483, 1484, 1489, 1490, 1491, 1492 and 1493. Compliance required within 350 hours of airplane time in service after the effective date of this directive, unless already accomplished. Hydraulic system motor operated valves, Whittaker P/N 146505-1, incorporated in both the utility and auxiliary hydraulic systems, have failed in service due to stress corrosion in the end cover retaining nut. All failures have occurred in parts with the original heat treatment. To prevent such failures: (1) Modify all valves by installing new end covers and nuts of the same Whittaker part number but identified by a blue anodized color; and (2) Replace the valve shear seals and the bearing with new longer seals and a new bearing. (Whittaker Service Bulletin SBC 2021 covers this same subject.) This directive effective November 10, 1962. FOOTER:
Document Text
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AD Final Rules - DRS_62-24-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 62-24-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: BOEING 707/720 Airplanes Subject: Hydraulic System Motor Operated Valves Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 11/10/1962 Make: The Boeing Company Model: 707-100 Long Body | 707-100B Long Body | 707-100B Short Body | 707-200 | 707-300 Series | 707-300B S...Show more Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 62-24-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 62-24-02 SUBJECT HEADING: BOEING 707/720 Airplanes ACTION: SUMMARY: DATES: Effective November 10, 1962. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 62-24-02 BOEING: Amdt. 506 Part 507 Federal Register November 10, 1962. Applies to 707/720 Airplanes, Serial Nos. 18385-18397, 18400-18404, 18374, 18414-18419, 18411, 18372, 18373, 18335-18339, 18079-18082, 18423-18425, 18376, 18377, 18451-18453 Inclusive; Also Applies to Airplanes Which Have Been Modified By Operators to Incorporate Motor Operated Valves Per Boeing Service Bulletins 1414, 1483, 1484, 1489, 1490, 1491, 1492 and 1493. Compliance required within 350 hours of airplane time in service after the effective date of this directive, unless already accomplished. Hydraulic system motor operated valves, Whittaker P/N 146505-1, incorporated in both the utility and auxiliary hydraulic systems, have failed in service due to stress corrosion in the end cover retaining nut. All failures have occurred in parts with the original heat treatment. To prevent such failures: (1) Modify all valves by installing new end covers and nuts of the same Whittaker part number but identified by a blue anodized color; and (2) Replace the valve shear seals and the bearing with new longer seals and a new bearing. (Whittaker Service Bulletin SBC 2021 covers this same subject.) This directive effective November 10, 1962. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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