AD 48-14-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | C54-DC | Airworthiness Directives;DOUGLAS C-54 |
| aircraft | The Boeing Company | C54A-DC | Airworthiness Directives;DOUGLAS C-54 |
| aircraft | The Boeing Company | C54B-DC | Airworthiness Directives;DOUGLAS C-54 |
| aircraft | The Boeing Company | C54D-DC | Airworthiness Directives;DOUGLAS C-54 |
| aircraft | The Boeing Company | C54E-DC | Airworthiness Directives;DOUGLAS C-54 |
Unsafe Condition
Fire hazard due to flame from a zone 1 fire entering the engine accessory section through the space between the tailpipe shroud and cowling.
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Required Actions
Install a tailpipe shroud deflector on each tailpipe shroud assembly. AN 3-3A bolts may be substituted for AN 3C-3A bolts as per Service Bulletin C-54-289 addendum.
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Compliance Time
November 1, 1948
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Affected Aircraft
Douglas C-54 Series Aircraft Prior to Model C-54G
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Federal Register Abstract
Tailpipe Shroud Deflector
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_48-14-04.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 48-14-04 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives;DOUGLAS C-54 Subject: Tailpipe Shroud Deflector 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C54-DC | C54A-DC | C54B-DC | C54D-DC | C54E-DC Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 48-14-04 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 48-14-04 SUBJECT HEADING: Airworthiness Directives;DOUGLAS C-54 ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 48-14-04 DOUGLAS: Applies to All C-54 Series Aircraft Prior to Model C-54G. Compliance required by November 1, 1948. Because of fire hazard install a tailpipe shroud deflector on each tailpipe shroud assembly to prevent flame from a zone 1 fire entering the engine accessory section through the space existing between the shroud and cowling. AN 3-3A bolts may be substituted for the AN 3C-3A bolts called out in the Service Bulletin. (Douglas Service Bulletin C-54-289 addendum covers this same subject.) FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_48-14-04.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 48-14-04 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives;DOUGLAS C-54 Subject: Tailpipe Shroud Deflector 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 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: 48-14-04 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 48-14-04 SUBJECT HEADING: Airworthiness Directives;DOUGLAS C-54 ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 48-14-04 DOUGLAS: Applies to All C-54 Series Aircraft Prior to Model C-54G. Compliance required by November 1, 1948. Because of fire hazard install a tailpipe shroud deflector on each tailpipe shroud assembly to prevent flame from a zone 1 fire entering the engine accessory section through the space existing between the shroud and cowling. AN 3-3A bolts may be substituted for the AN 3C-3A bolts called out in the Service Bulletin. (Douglas Service Bulletin C-54-289 addendum 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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