AD 98-09-29
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 |
Unsafe Condition
Overheating and heat damage of the APU battery grounds due to improper installation or maintenance, which could result in smoke or fire on the airplane.
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Required Actions
Reconfigure the APU battery grounds to a dual-direct ground, single-lug configuration in accordance with Boeing Alert Service Bulletin 747-24A2214. An alternative method of compliance may be used if approved by the Manager, Seattle Aircraft Certification Office.
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Compliance Time
Within 12 months after the effective date of this AD (June 10, 1998).
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Affected Aircraft
Boeing Model 747-400 series airplanes listed in Boeing Alert Service Bulletin 747-24A2214, including 747-400, 747-400D, and 747-400F series, certificated in any category.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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