AD 64-22-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 707-100 Long Body | BOEING Model 707, 720 and 727 Series Aircraft |
| aircraft | The Boeing Company | 707-100B Long Body | BOEING Model 707, 720 and 727 Series Aircraft |
| aircraft | The Boeing Company | 707-100B Short Body | BOEING Model 707, 720 and 727 Series Aircraft |
| aircraft | The Boeing Company | 707-200 | BOEING Model 707, 720 and 727 Series Aircraft |
| aircraft | The Boeing Company | 707-300 Series | BOEING Model 707, 720 and 727 Series Aircraft |
| aircraft | The Boeing Company | 707-300B Series | BOEING Model 707, 720 and 727 Series Aircraft |
| aircraft | The Boeing Company | 707-300C Series | BOEING Model 707, 720 and 727 Series Aircraft |
| aircraft | The Boeing Company | 707-400 Series | BOEING Model 707, 720 and 727 Series Aircraft |
| aircraft | The Boeing Company | 720 Series | BOEING Model 707, 720 and 727 Series Aircraft |
| aircraft | The Boeing Company | 720B Series | BOEING Model 707, 720 and 727 Series Aircraft |
Unsafe Condition
Overheating of the cove light ballast units due to use of Day-Ray Ballasts Type 62-37 with serial numbers below 5639 or Servo Mechanism Ballast Type 562859.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Deactivate cabin fluorescent cove light systems by securing circuit breakers in the off position with a clip-on guard. Reactivate only after installing Day-Ray ballasts type 62-37 (serial numbers 5639 and above), Servo mechanism ballasts type 563116, or an equivalent approved by FAA.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within 50 hours' time in service after the effective date of this AD unless already accomplished
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Boeing Model 707, 720, and 727 Series Aircraft with fluorescent cabin cove lights using Day-Ray Ballasts Type 62-37 (serial numbers below 5639) or Servo Mechanism Ballast Type 562859
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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