AD 62-12-01
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
Fires originating in the electrical system of the d.c. type toilet flushing motor due to moisture exposure and prolonged d.c. voltage exposure.
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Required Actions
Rework the toilet motor electrical circuit by: (a) modifying timer wiring to apply voltage only during flushing, (b) relocating the connector to a moisture-protected bracket, (c) improving moisture seals with trimmed shielding and thermo fit sleeving, and (d) replacing potting compound with resilient inserts, grommets, and cable clamps.
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Compliance Time
Within 360 hours' time in service for paragraph (a) and 1,000 hours' time in service for paragraphs (b), (c), and (d) after the effective date of this AD.
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Affected Aircraft
All Models 707 and 720 Series Aircraft with DC type toilet flushing motor installed.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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