AD 92-04-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 747-100 Series | Airworthiness Directives; 92-04-05 BOEING Model 747 Series Airplanes |
| aircraft | The Boeing Company | 747-100B Series | Airworthiness Directives; 92-04-05 BOEING Model 747 Series Airplanes |
| aircraft | The Boeing Company | 747-100B SUD Series | Airworthiness Directives; 92-04-05 BOEING Model 747 Series Airplanes |
| aircraft | The Boeing Company | 747-200B Series | Airworthiness Directives; 92-04-05 BOEING Model 747 Series Airplanes |
| aircraft | The Boeing Company | 747-200C Series | Airworthiness Directives; 92-04-05 BOEING Model 747 Series Airplanes |
| aircraft | The Boeing Company | 747-200F Series | Airworthiness Directives; 92-04-05 BOEING Model 747 Series Airplanes |
| aircraft | The Boeing Company | 747-300 Series | Airworthiness Directives; 92-04-05 BOEING Model 747 Series Airplanes |
| aircraft | The Boeing Company | 747-400 Series | Airworthiness Directives; 92-04-05 BOEING Model 747 Series Airplanes |
| aircraft | The Boeing Company | 747-400D Series | Airworthiness Directives; 92-04-05 BOEING Model 747 Series Airplanes |
| aircraft | The Boeing Company | 747-400F Series | Airworthiness Directives; 92-04-05 BOEING Model 747 Series Airplanes |
Unsafe Condition
APU pneumatic duct contact with the elevator control rod in the event of a duct rupture could damage the elevator control system and result in a reduced ability to control the pitch of the airplane.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Install an APU pneumatic duct restraint per Boeing Alert Service Bulletin 747-36A2087 dated June 6, 1991. Alternative methods or compliance time adjustments may be approved by the Manager, Seattle Aircraft Certification Office. Special flight permits may be issued under FAR 21.197 and 21.199.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within one year after the effective date of this AD
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Affected Aircraft
Boeing Model 747 series airplanes; line numbers 1 through 856 except line numbers 679 and 685
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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