AD 96-14-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 747-200B Series | Airworthiness Directives; Boeing Model 747-200 ("Combi") and 747-300 ("Combi") Airplanes |
| aircraft | The Boeing Company | 747-200C Series | Airworthiness Directives; Boeing Model 747-200 ("Combi") and 747-300 ("Combi") Airplanes |
| aircraft | The Boeing Company | 747-200F Series | Airworthiness Directives; Boeing Model 747-200 ("Combi") and 747-300 ("Combi") Airplanes |
| aircraft | The Boeing Company | 747-300 Series | Airworthiness Directives; Boeing Model 747-200 ("Combi") and 747-300 ("Combi") Airplanes |
Unsafe Condition
Omission of a gasket seal in the oxygen hose assembly installed on Boeing Model 747-200 and -300 'combi' airplanes modified with Heath Tecna STC SA2365NM or SA5108NM could cause oxygen leakage from the passenger oxygen supply lines, preventing adequate oxygen flow to passengers during mask deployment.
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Required Actions
Remove specified oxygen hose assembly components (P/N 173479-16, bushings, tube, nuts) and install a new union-bulkhead (P/N MS21924D10) and oxygen hose assembly (P/N 45901-10-0200). Perform an oxygen system leak test per Boeing 747 Maintenance Manual Chapter 35.21.
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Compliance Time
Within 15 months after the effective date of this AD (July 22, 1996)
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Affected Aircraft
Boeing Model 747-200 'combi' and 747-300 'combi' airplanes modified with Heath Tecna Supplemental Type Certificate (STC) SA2365NM or STC SA5108NM.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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