AD 87-24-09
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 747-100 Series | Airworthiness Directives; BOEING Model 747 and Model 767 Series Airplanes |
| aircraft | The Boeing Company | 747-100B Series | Airworthiness Directives; BOEING Model 747 and Model 767 Series Airplanes |
| aircraft | The Boeing Company | 747-100B SUD Series | Airworthiness Directives; BOEING Model 747 and Model 767 Series Airplanes |
| aircraft | The Boeing Company | 747-200B Series | Airworthiness Directives; BOEING Model 747 and Model 767 Series Airplanes |
| aircraft | The Boeing Company | 747-200C Series | Airworthiness Directives; BOEING Model 747 and Model 767 Series Airplanes |
| aircraft | The Boeing Company | 747-200F Series | Airworthiness Directives; BOEING Model 747 and Model 767 Series Airplanes |
| aircraft | The Boeing Company | 747-300 Series | Airworthiness Directives; BOEING Model 747 and Model 767 Series Airplanes |
| aircraft | The Boeing Company | 747-400 Series | Airworthiness Directives; BOEING Model 747 and Model 767 Series Airplanes |
| aircraft | The Boeing Company | 747-400D Series | Airworthiness Directives; BOEING Model 747 and Model 767 Series Airplanes |
| aircraft | The Boeing Company | 747-400F Series | Airworthiness Directives; BOEING Model 747 and Model 767 Series Airplanes |
Unsafe Condition
Electromagnetic interference may cause misleading localizer deviation indications to the flight crew.
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Required Actions
Replace existing weather radar receiver-transmitters with modified units per Boeing Service Bulletins 747-34A2286 or 767-34A0055, or later FAA-approved revision. Alternate compliance may be approved by the Manager, Seattle Aircraft Certification Office.
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Compliance Time
within 12 months after the effective date of this AD
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Affected Aircraft
Boeing Model 747 and Model 767 series airplanes specified in Boeing Service Bulletins 747-34A2286 and 767-34A0055, Revision 1, dated April 30, 1987, and September 17, 1987 respectively.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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