AD 70-09-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 737-100 Series | BOEING Model 737 Series Airplanes |
| aircraft | The Boeing Company | 737-200 Series | BOEING Model 737 Series Airplanes |
| aircraft | The Boeing Company | 737-200C Series | BOEING Model 737 Series Airplanes |
| aircraft | The Boeing Company | 737-300 Series | BOEING Model 737 Series Airplanes |
| aircraft | The Boeing Company | 737-400 Series | BOEING Model 737 Series Airplanes |
| aircraft | The Boeing Company | 737-500 Series | BOEING Model 737 Series Airplanes |
| aircraft | The Boeing Company | 737-600 Series | BOEING Model 737 Series Airplanes |
| aircraft | The Boeing Company | 737-700 Series | BOEING Model 737 Series Airplanes |
| aircraft | The Boeing Company | 737-800 Series | BOEING Model 737 Series Airplanes |
Unsafe Condition
Inadvertent operation of the battery switch during some operating conditions could result in loss of the standby electrical system.
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Required Actions
Install a switch guard and light plate per Boeing Service Bulletin 24-1010 Rev 1 or later FAA-approved revisions; replace the battery switch with a detent lock type switch (P/N MS 24659-23D or equivalent MS type) with a toggle-type galley switch; or perform an equivalent installation approved by the FAA Chief, Aircraft Engineering Division, Western Region.
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Compliance Time
within the next 250 hours time in service after the effective date of this AD
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Affected Aircraft
Boeing Model 737 series airplanes including 737-100, 737-200, 737-200C, 737-300, 737-400, 737-500 series
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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