AD 92-02-13
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
The potential for an uncontrollable fire in the aft lower lobe compartment.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Install a decompression panel and flapper valve in accordance with Boeing Alert Service Bulletin 747-21A2312 or Boeing Service Bulletin 747-21-2317, both dated May 30, 1991. An alternative method of compliance or adjustment of the compliance time may be used when approved by the FAA Manager, Seattle Aircraft Certification Office.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within the next 60 days after the effective date of this AD, unless previously accomplished
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Model 747 series airplanes as listed in Boeing Alert Service Bulletin 747-21A2312 and Boeing Service Bulletin 747-21-2317, both dated May 30, 1991, 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
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.