AD 97-23-16
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 777-200 Series | Airworthiness Directives; Boeing Model 777-200 Series Airplanes |
Unsafe Condition
Overheating of the transformers located in the overhead electronics units (OEU) could cause a fire in the transformer assembly and/or electronic components and smoke to enter the passenger cabin.
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Required Actions
Replace OEU's with part numbers 285W0029-3, 285W0029-3 MOD A, and 285W0029-3 MOD B with modified OEU's having part numbers 285W0029-5, 285W0029-5 MOD A, and 285W0029-5 MOD B, following Boeing Alert Service Bulletin 777-23A0027. Ensure no installation of non-compliant OEU's after the effective date.
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Compliance Time
Within 6 months after the effective date of this AD (December 22, 1997).
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Affected Aircraft
Boeing Model 777-200 series airplanes listed in Boeing Alert Service Bulletin 777-23A0027, dated February 13, 1997.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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