AD 46-11-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | C54-DC | DOUGLAS Model C-54 Series Aircraft |
| aircraft | The Boeing Company | C54A-DC | DOUGLAS Model C-54 Series Aircraft |
| aircraft | The Boeing Company | C54B-DC | DOUGLAS Model C-54 Series Aircraft |
| aircraft | The Boeing Company | C54D-DC | DOUGLAS Model C-54 Series Aircraft |
| aircraft | The Boeing Company | C54E-DC | DOUGLAS Model C-54 Series Aircraft |
| aircraft | The Boeing Company | C54G-DC | DOUGLAS Model C-54 Series Aircraft |
Unsafe Condition
The copilot oxygen regulator's current position below the autopilot control handle creates a fire hazard and contamination risk if hydraulic fluid drips from the autopilot control valve onto the regulator.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Relocate the copilot oxygen regulator to Station 101 aft of the windshield defroster control plate and knob to eliminate the fire hazard and contamination risk.
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Compliance Time
not later than July 1, 1948
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Affected Aircraft
The Boeing Company Model C54-DC, C54A-DC, C54B-DC, C54D-DC, C54E-DC, C54G-DC aircraft
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Federal Register Abstract
Copilot Oxygen Regulator
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_46-11-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 46-11-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: DOUGLAS Model C-54 Series Aircraft Subject: Copilot Oxygen Regulator Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: The Boeing Company Model: C54-DC | C54A-DC | C54B-DC | C54D-DC | C54E-DC | C54G-DC Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 46-11-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 46-11-02 SUBJECT HEADING: DOUGLAS Model C-54 Series Aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 46-11-02 DOUGLAS: (Was Mandatory Note 1 of AD-762-7.) Applies to All C-54 Series Aircraft. To be accomplished not later than July 1, 1948. The copilot oxygen regulator must be relocated from its position below the autopilot control handle to Station 101 aft of the windshield defroster control plate and knob, in order to eliminate a fire hazard and contamination of the oxygen regulator in the event hydraulic fluid drips on the regulator from the autopilot control valve. (Douglas Service Bulletin No. C-54-247 dated November 16, 1945, covers this same subject.) FOOTER:
Document Text
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AD Final Rules - DRS_46-11-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 46-11-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: DOUGLAS Model C-54 Series Aircraft Subject: Copilot Oxygen Regulator Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: The Boeing Company Model: C54-DC | C54A-DC | C54B-DC | C54D-DC | C54E-DC | C54G-DC 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: 46-11-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 46-11-02 SUBJECT HEADING: DOUGLAS Model C-54 Series Aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 46-11-02 DOUGLAS: (Was Mandatory Note 1 of AD-762-7.) Applies to All C-54 Series Aircraft. To be accomplished not later than July 1, 1948. The copilot oxygen regulator must be relocated from its position below the autopilot control handle to Station 101 aft of the windshield defroster control plate and knob, in order to eliminate a fire hazard and contamination of the oxygen regulator in the event hydraulic fluid drips on the regulator from the autopilot control valve. (Douglas Service Bulletin No. C-54-247 dated November 16, 1945, covers this same subject.) 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.
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