AD 63-16-01
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
Inadvertent aft thrust reverser sleeve actuation due to insufficient clearance between the upper latch lock hook and the latch roller support structure.
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Required Actions
Inspect the upper latch lock hook for clearance with the roller support structure using a feeler gauge, rework the latch installation by replacing the pivot bearing or latch assembly with specified parts, install washers, and provide an indexing stripe. Later, install a new latch pivot bearing and anti-jamming means, and perform post-engine replacement checks.
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Compliance Time
Within 300 hours' time in service after March 4, 1964, and every 500 hours thereafter until (d); (d) must be done within 2,400 hours' time in service after March 4, 1964. Engine replacements after (d) require post-replacement checks.
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Affected Aircraft
Boeing Models 707 and 720 Series aircraft equipped with Pratt & Whitney JT3D-1 or -3 engines.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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