AD 98-18-23
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
Cracking on all surfaces of the upper recesses in certain 7079-T6 aluminum latch support fittings of the cargo doorway could result in the cargo door opening in flight, causing rapid decompression.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Within 18 months after the effective date of this AD, replace all 7079-T6 aluminum latch support fittings with new 7075-T73 fittings. Prior to further flight, replace any cracked fittings found during HFEC inspections. Repeat inspections every 18 months until the replacement is done.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 18 months after the effective date of this AD
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Affected Aircraft
Boeing Model 747 series airplanes, line numbers 1 through 200 inclusive; having 7079-T6 aluminum latch support fittings.
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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