AD 99-24-08
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 737-100 Series | Airworthiness Directives; BOEING Model 737-100, -200, -300, -400, and -500 Series Airplanes |
| aircraft | The Boeing Company | 737-200 Series | Airworthiness Directives; BOEING Model 737-100, -200, -300, -400, and -500 Series Airplanes |
| aircraft | The Boeing Company | 737-300 Series | Airworthiness Directives; BOEING Model 737-100, -200, -300, -400, and -500 Series Airplanes |
| aircraft | The Boeing Company | 737-400 Series | Airworthiness Directives; BOEING Model 737-100, -200, -300, -400, and -500 Series Airplanes |
| aircraft | The Boeing Company | 737-500 Series | Airworthiness Directives; BOEING Model 737-100, -200, -300, -400, and -500 Series Airplanes |
Unsafe Condition
Failure of all electrically powered airplane systems due to a combination of a weak or depleted battery and the failure of diode CR910 of the Generator Control Units (GCU).
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Required Actions
Replace the airplane battery with a new or reconditioned battery in accordance with Chapter 20-20-111 of the Boeing 737 Airplane Maintenance Manual. Perform the 'Alternative Test of Diode CR910' as specified in Boeing Telex Message M-7200-99-01528. Replace the battery charger with a new or serviceable battery charger for certain airplanes.
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Compliance Time
Before further flight
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Affected Aircraft
Boeing Model 737-100, -200, -300, -400, and -500 series airplanes equipped with battery chargers having Boeing part numbers 10-60701-1 or 10-60701-3.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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