AD 66-06-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 707-200 | BOEING Model 707-200 and -300 Series Airplanes |
| aircraft | The Boeing Company | 707-300 Series | BOEING Model 707-200 and -300 Series Airplanes |
| aircraft | The Boeing Company | 707-300B Series | BOEING Model 707-200 and -300 Series Airplanes |
| aircraft | The Boeing Company | 707-300C Series | BOEING Model 707-200 and -300 Series Airplanes |
Unsafe Condition
Loose B-nut on the thrust reverser P(s4) lines due to stainless steel 17-4 PH CRES sleeves.
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Required Actions
Replace P(s4) tube assemblies with case-hardened 316 CRES sleeves per Boeing Service Bulletin 2228, or first use nickel/silver plated carbon steel sleeves then later replace with 316 CRES sleeves as per Boeing Service Letter 6-7161-4-8966 and subsequent Service Bulletin.
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Compliance Time
Within the next 1,200 hours' time in service after February 22, 1966, and for the second step in option (b), within the next 3,000 hours' time in service after the same date.
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Affected Aircraft
Boeing Model 707-200 and -300 Series airplanes equipped with Pratt & Whitney JT4 engines.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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