AD 90-25-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 707-100 Long Body | Airworthiness Directives; BOEING Model 707/720 Series Airplanes |
| aircraft | The Boeing Company | 707-100B Long Body | Airworthiness Directives; BOEING Model 707/720 Series Airplanes |
| aircraft | The Boeing Company | 707-100B Short Body | Airworthiness Directives; BOEING Model 707/720 Series Airplanes |
| aircraft | The Boeing Company | 707-200 | Airworthiness Directives; BOEING Model 707/720 Series Airplanes |
| aircraft | The Boeing Company | 707-300 Series | Airworthiness Directives; BOEING Model 707/720 Series Airplanes |
| aircraft | The Boeing Company | 707-300B Series | Airworthiness Directives; BOEING Model 707/720 Series Airplanes |
| aircraft | The Boeing Company | 707-300C Series | Airworthiness Directives; BOEING Model 707/720 Series Airplanes |
| aircraft | The Boeing Company | 707-400 Series | Airworthiness Directives; BOEING Model 707/720 Series Airplanes |
| aircraft | The Boeing Company | 720 Series | Airworthiness Directives; BOEING Model 707/720 Series Airplanes |
| aircraft | The Boeing Company | 720B Series | Airworthiness Directives; BOEING Model 707/720 Series Airplanes |
Unsafe Condition
Corrosion in Model 707/720 series airplanes could lead to structural failure if not controlled through an approved corrosion prevention and control program.
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Required Actions
Revise the FAA-approved maintenance program to include Boeing Document D6-54928 within one year after the AD's effective date. Report Level 3 corrosion findings within 7 days and inspect fleet or submit adjustment proposals to the Seattle ACO. Submit quarterly reports for Level 2 corrosion and follow-up for Level 3 corrosion. Maintain or shorten existing corrosion inspection intervals without approval.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within one year after the effective date of this AD
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Affected Aircraft
All Model 707/720 series airplanes, certificated in any category.
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
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