AD 90-26-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 747-400 Series | Airworthiness Directives; BOEING Model 747-400 Series Airplanes |
| aircraft | The Boeing Company | 747-400D Series | Airworthiness Directives; BOEING Model 747-400 Series Airplanes |
| aircraft | The Boeing Company | 747-400F Series | Airworthiness Directives; BOEING Model 747-400 Series Airplanes |
| aircraft | The Boeing Company | 767-200 Series | Airworthiness Directives; BOEING Model 747-400 Series Airplanes |
| aircraft | The Boeing Company | 767-300 Series | Airworthiness Directives; BOEING Model 747-400 Series Airplanes |
| aircraft | The Boeing Company | 767-300F Series | Airworthiness Directives; BOEING Model 747-400 Series Airplanes |
| aircraft | The Boeing Company | 767-400ER Series | Airworthiness Directives; BOEING Model 747-400 Series Airplanes |
Unsafe Condition
Insufficient cargo fire protection, which could result in significant damage to the airplane in the event of a cargo compartment fire.
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Required Actions
Inspect cargo compartment fire extinguisher orifices in accordance with specified Boeing Alert Service Bulletins. Replace with correct part if part number does not match specified numbers in the service bulletins. Submit a report of findings within 10 days after inspection if discrepancies are found.
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Compliance Time
Within 30 days after October 1, 1990 (for Model 747-400 series and Model 767-300 series forward cargo compartments) or within 30 days after the effective date of this amendment (for other Model 767 series).
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Affected Aircraft
Boeing Model 747-400 Series, 747-400D Series, 747-400F Series, 767-200 Series, 767-300 Series, 767-300F Series airplanes listed in Boeing Alert Service Bulletins 747-26A2170 and 767-26A0068 (Revision 1).
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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