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.
AI-generated summary from the source AD text. Verify against the official source before acting.
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.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within 350 hours of airplane time in service after the effective date of this directive
AI-generated summary from the source AD text. Verify against the official source before acting.
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.
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.