AD 62-08-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 707-100 Long Body | BOEING Models 707 and 720 Series Aircraft |
| aircraft | The Boeing Company | 707-100B Long Body | BOEING Models 707 and 720 Series Aircraft |
| aircraft | The Boeing Company | 707-100B Short Body | BOEING Models 707 and 720 Series Aircraft |
| aircraft | The Boeing Company | 707-200 | BOEING Models 707 and 720 Series Aircraft |
| aircraft | The Boeing Company | 707-300 Series | BOEING Models 707 and 720 Series Aircraft |
| aircraft | The Boeing Company | 707-300B Series | BOEING Models 707 and 720 Series Aircraft |
| aircraft | The Boeing Company | 707-300C Series | BOEING Models 707 and 720 Series Aircraft |
| aircraft | The Boeing Company | 707-400 Series | BOEING Models 707 and 720 Series Aircraft |
| aircraft | The Boeing Company | 720 Series | BOEING Models 707 and 720 Series Aircraft |
| aircraft | The Boeing Company | 720B Series | BOEING Models 707 and 720 Series Aircraft |
Unsafe Condition
Cracking of the magnesium skin on the horizontal stabilizer balance panel covers.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Conduct close visual inspections of upper and lower horizontal stabilizer balance panel covers with magnesium skin to detect skin cracks. Repaired, replaced, or modified cracked covers prior to further flight using specified methods, including repair per Structural Repair Manual, replacement with new magnesium or aluminum alloy covers, honeycomb panel construction covers with specific part numbers, or FAA-approved technical data. Inspect bonding between cover skin and supporting structure during repairs or major overhauls and repair bond separation with specified rivets if needed.
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Compliance Time
Within 85 hours' time in service following the effective date of this AD unless already accomplished within the last 85 hours, and thereafter at periods not to exceed 170 hours' time in service from the last inspection.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Boeing Models 707 and 720 Series Aircraft which incorporate magnesium skin on the horizontal stabilizer balance panel covers.
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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