AD 90-25-08
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 747-100 Series | BOEING Model 747 and 767 Series Airplanes |
| aircraft | The Boeing Company | 747-100B Series | BOEING Model 747 and 767 Series Airplanes |
| aircraft | The Boeing Company | 747-100B SUD Series | BOEING Model 747 and 767 Series Airplanes |
| aircraft | The Boeing Company | 747-200B Series | BOEING Model 747 and 767 Series Airplanes |
| aircraft | The Boeing Company | 747-200C Series | BOEING Model 747 and 767 Series Airplanes |
| aircraft | The Boeing Company | 747-200F Series | BOEING Model 747 and 767 Series Airplanes |
| aircraft | The Boeing Company | 747-300 Series | BOEING Model 747 and 767 Series Airplanes |
| aircraft | The Boeing Company | 747-400 Series | BOEING Model 747 and 767 Series Airplanes |
| aircraft | The Boeing Company | 747-400D Series | BOEING Model 747 and 767 Series Airplanes |
| aircraft | The Boeing Company | 747-400F Series | BOEING Model 747 and 767 Series Airplanes |
Unsafe Condition
A cargo compartment fire could migrate up behind the cargo liner in Class 'C' lower lobe cargo compartments without complete cargo compartment floors.
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Required Actions
Install a fire stop near the bottom of the sloping sidewall cargo compartment liner in accordance with an approved method. The fire stop material must meet FAR Part 25, Appendix F, Part III requirements. An alternate means of compliance or adjustment of compliance time may be approved by the FAA.
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Compliance Time
Within 30 months after the effective date of this AD, unless previously accomplished; except for airplanes subject to FAR 121.314, modifications shall not be accomplished prior to complying with FAR 121.314 requirements.
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Affected Aircraft
Boeing Model 747 and 767 series airplanes equipped with Class 'C' lower lobe cargo compartments that do not have complete cargo compartment floors.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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