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.
AI-generated summary from the source AD text. Verify against the official source before acting.
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.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
not later than August 21, 1959
AI-generated summary from the source AD text. Verify against the official source before acting.
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)
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.