AD 92-27-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 747-100 Series | Airworthiness Directives; BOEING Model 747 Series Airplanes |
| aircraft | The Boeing Company | 747-100B Series | Airworthiness Directives; BOEING Model 747 Series Airplanes |
| aircraft | The Boeing Company | 747-100B SUD Series | Airworthiness Directives; BOEING Model 747 Series Airplanes |
| aircraft | The Boeing Company | 747-200B Series | Airworthiness Directives; BOEING Model 747 Series Airplanes |
| aircraft | The Boeing Company | 747-200C Series | Airworthiness Directives; BOEING Model 747 Series Airplanes |
| aircraft | The Boeing Company | 747-200F Series | Airworthiness Directives; BOEING Model 747 Series Airplanes |
| aircraft | The Boeing Company | 747-300 Series | Airworthiness Directives; BOEING Model 747 Series Airplanes |
| aircraft | The Boeing Company | 747-400 Series | Airworthiness Directives; BOEING Model 747 Series Airplanes |
| aircraft | The Boeing Company | 747-400D Series | Airworthiness Directives; BOEING Model 747 Series Airplanes |
| aircraft | The Boeing Company | 747-400F Series | Airworthiness Directives; BOEING Model 747 Series Airplanes |
Unsafe Condition
Degradation of the structural capability of the airplane due to aging-related issues requiring inspections as specified in Boeing Document D6-35999, Revision C.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Accomplish inspections specified in Section 4 of Boeing Document D6-35999, Revision C, within the times specified in the AD, and thereafter at intervals not exceeding those in the corresponding service bulletins. Corrective actions must be done prior to further flight if discrepancies are found. Modifications per service bulletins are required as terminating actions.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the later of (1) the threshold inspection time specified in the corresponding service bulletin (measured as flight cycles or time-in-service) or (2) the phase-in period from the AD's effective date (January 20, 1993).
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Boeing Model 747 series airplanes listed in Section 4 of Boeing Document D6-35999, Revision C, certificated in any category.
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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