AD 59-16-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 707-100 Long Body | BOEING 707-100 series aircraft |
| aircraft | The Boeing Company | 707-100B Long Body | BOEING 707-100 series aircraft |
| aircraft | The Boeing Company | 707-100B Short Body | BOEING 707-100 series aircraft |
Unsafe Condition
Complete loss of fluid during service operation of the utility hydraulic system, primarily due to failure of engine driven hydraulic pump.
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Required Actions
Install new pump Vickers No. AS-61689-L-2E in place of AS-61689-L-2B or -2C, or install pump external by-pass valve No. A-90073-Y6 with the -2B or -2C pump and replace shaft seal on each hydraulic pump. Install return line filter.
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Compliance Time
not later than August 21, 1959
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Affected Aircraft
Boeing 707-100 series aircraft with serial numbers: Model 707-121 (17586-17591), Model 707-124 (17609), Model 707-123 (17628-17643), Model 707-131 (17659-17672), Model VC-137A (17925-17927)
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Federal Register Abstract
Utility Hydraulic System
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_59-16-05.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 59-16-05 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: BOEING 707-100 series aircraft Subject: Utility Hydraulic System Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: The Boeing Company Model: 707-100 Long Body | 707-100B Long Body | 707-100B Short Body Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 59-16-05 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 59-16-05 SUBJECT HEADING: BOEING 707-100 series aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 59-16-05 BOEING: Applies to 707-100 series aircraft with the following serial numbers: Model 707-121 serial numbers 17586 through 17591, Model 707-124 serial number 17609, Model 707-123 serial numbers 17628 through 17643, Model 707-131 serial numbers 17659 through 17672, Model VC-137A serial numbers 17925 through 17927. Compliance required not later than August 21, 1959. As a result of complete loss of fluid during service operation of the utility hydraulic system, primarily due to failure of engine driven hydraulic pump the following must be accomplished: (a) Install new pump, Vickers No. AS-61689-L-2E, in place of the AS-61689-L-2B or - 2C, or install pump external by-pass valve No. A-90073-Y6 with the -2B or -2C pump. If the pump external by-pass valve is installed the shaft seal on each hydraulic pump must be replaced at the same time. (b) Install return line filter. Boeing Service Bulletin No. 379 and Vickers Service Letter dated June 17, 1959, pertain to item (a). Boeing Service Bulletins Nos. 69 and 213 pertain to item (b). FOOTER:
Document Text
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AD Final Rules - DRS_59-16-05.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 59-16-05 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: BOEING 707-100 series aircraft Subject: Utility Hydraulic System Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: The Boeing Company Model: 707-100 Long Body | 707-100B Long Body | 707-100B Short Body 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: 59-16-05 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 59-16-05 SUBJECT HEADING: BOEING 707-100 series aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 59-16-05 BOEING: Applies to 707-100 series aircraft with the following serial numbers: Model 707-121 serial numbers 17586 through 17591, Model 707-124 serial number 17609, Model 707-123 serial numbers 17628 through 17643, Model 707-131 serial numbers 17659 through 17672, Model VC-137A serial numbers 17925 through 17927. Compliance required not later than August 21, 1959. As a result of complete loss of fluid during service operation of the utility hydraulic system, primarily due to failure of engine driven hydraulic pump the following must be accomplished: (a) Install new pump, Vickers No. AS-61689-L-2E, in place of the AS-61689-L-2B or - 2C, or install pump external by-pass valve No. A-90073-Y6 with the -2B or -2C pump. If the pump external by-pass valve is installed the shaft seal on each hydraulic pump must be replaced at the same time. (b) Install return line filter. Boeing Service Bulletin No. 379 and Vickers Service Letter dated June 17, 1959, pertain to item (a). Boeing Service Bulletins Nos. 69 and 213 pertain to item (b). FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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