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.
AI-generated summary from the source AD text. Verify against the official source before acting.
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.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within the next 250 hours time in service after the effective date of this AD
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Boeing Model 737 series airplanes including 737-100, 737-200, 737-200C, 737-300, 737-400, 737-500 series
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Operation Of Battery Switch
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_70-09-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 70-09-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: BOEING Model 737 Series Airplanes Subject: Operation Of Battery Switch Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 04/23/1970 Make: The Boeing Company Model: 737-100 Series | 737-200 Series | 737-200C Series | 737-300 Series | 737-400 Series | 737-500 Series...Show more Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 70-09-01 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-976 AD NUMBER: 70-09-01 SUBJECT HEADING: BOEING Model 737 Series Airplanes ACTION: SUMMARY: DATES: Effective April 23, 1970. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 70-09-01 BOEING: Amdt. 39-976. Applies to Model 737 series airplanes. Compliance required within the next 250 hours time in service after the effective date of this ad, unless already accomplished. As a result of FAA evaluations of the 737 electrical system sufficient cause has been found to prevent inadvertent operation of the battery switch located on the forward overhead panel. Inadvertent operation of the battery switch during some operating conditions could result in loss of the standby electrical system. To prevent inadvertent operation of the battery switch on the forward overhead panel on the subject 737 series airplanes, accomplish one of the following: (1) Install a switch guard and light plate per the Boeing Service Bulletin No. 24- 1010 Revision (1) dated April 24, 1970, or later FAA approved revisions. (2) Replace the battery switch with a detent lock type switch, P/N MS 24659-23D or an equivalent MS type, provided the galley switch is a toggle type. (3) Perform an equivalent installation approved by the Chief, Aircraft Engineering Division, FAA, Western Region. This amendment becomes effective April 23, 1970. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_70-09-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 70-09-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: BOEING Model 737 Series Airplanes Subject: Operation Of Battery Switch Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 04/23/1970 Make: The Boeing Company Model: 737-100 Series | 737-200 Series | 737-200C Series | 737-300 Series | 737-400 Series | 737-500 Series...Show more Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 70-09-01 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-976 AD NUMBER: 70-09-01 SUBJECT HEADING: BOEING Model 737 Series Airplanes ACTION: SUMMARY: DATES: Effective April 23, 1970. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 70-09-01 BOEING: Amdt. 39-976. Applies to Model 737 series airplanes. Compliance required within the next 250 hours time in service after the effective date of this ad, unless already accomplished. As a result of FAA evaluations of the 737 electrical system sufficient cause has been found to prevent inadvertent operation of the battery switch located on the forward overhead panel. Inadvertent operation of the battery switch during some operating conditions could result in loss of the standby electrical system. To prevent inadvertent operation of the battery switch on the forward overhead panel on the subject 737 series airplanes, accomplish one of the following: (1) Install a switch guard and light plate per the Boeing Service Bulletin No. 24- 1010 Revision (1) dated April 24, 1970, or later FAA approved revisions. (2) Replace the battery switch with a detent lock type switch, P/N MS 24659-23D or an equivalent MS type, provided the galley switch is a toggle type. (3) Perform an equivalent installation approved by the Chief, Aircraft Engineering Division, FAA, Western Region. This amendment becomes effective April 23, 1970. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.
Related Airworthiness Directives
2025-02-02 Recurring
final ruleAirworthiness Directives; The Boeing Company Airplanes
Unsafe Condition: cracks in the frame inner chord and web at station (STA) 727 between S-11L and S-13L, which could result in the inability of a principal structural element to sustain limit load, and adversely affe...
2023-13-12 Recurring
final ruleAirworthiness Directives; The Boeing Company Airplanes
Unsafe Condition: premature aging of certain passenger chemical oxygen generators, which could fail to deliver oxygen during an emergency, possibly resulting in injury to the airplane occupants.
2023-12-13
final ruleAirworthiness Directives; The Boeing Company Airplanes
Unsafe Condition: Radio altimeters cannot be relied upon to perform their intended function if they experience interference from wireless broadband operations in the 5G C-Band. This interference can cause other airp...
2023-10-02
final ruleAirworthiness Directives; Transport and Commuter Category Airplanes
Unsafe Condition: Radio altimeter anomalies that are undetected by the automation or pilot, particularly close to the ground (e.g., landing flare), could lead to loss of continued safe flight and landing. Additional...