AD 44-52-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 247-D (Army C-73) | BOEING 247-D Aircraft |
Unsafe Condition
Cracks in the outer wing panel 17SRT aluminum alloy spar chord members could lead to structural failure.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect immediately and every 250 flight hours thereafter the outer wing panel 17SRT spar chord members for cracks. Repair or replace cracked members in a manner satisfactory to the FAA. Installing 24ST tubing replaces the need for further inspection.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
immediately
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Boeing 247-D (Army C-73) aircraft
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Outer Wing Panel
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_44-52-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 44-52-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: BOEING 247-D Aircraft Subject: Outer Wing Panel Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: The Boeing Company Model: 247-D (Army C-73) Product Type: Aircraft Product Subtype: Small Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 44-52-01 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 44-52-01 SUBJECT HEADING: BOEING 247-D Aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 44-52-01 BOEING: (Was Service Note 1 of AD-558-1 and Service Note 1 of AD-524-1.) Applies to 247-D Aircraft. Inspect immediately and every 250 hours thereafter the outer wing panel 17SRT aluminum alloy spar chord members for cracks. Unless special openings are installed, the outer panels may have to be removed to permit thorough inspection. If cracks are found, the members should be repaired or replaced in a manner satisfactory to the FAA. If replacement 24ST tubing is installed no further inspection will be necessary. Boeing Service Bulletin No. 1 of D-6134 describes a satisfactory method of installation of inspection openings in the lower surface of the outer wing. Boeing Service Bulletin No. 2 of D-6134 covers replacement of 17SRT spar chords with 24ST spar chords. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_44-52-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 44-52-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: BOEING 247-D Aircraft Subject: Outer Wing Panel Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: The Boeing Company Model: 247-D (Army C-73) Product Type: Aircraft Product Subtype: Small 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: 44-52-01 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 44-52-01 SUBJECT HEADING: BOEING 247-D Aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 44-52-01 BOEING: (Was Service Note 1 of AD-558-1 and Service Note 1 of AD-524-1.) Applies to 247-D Aircraft. Inspect immediately and every 250 hours thereafter the outer wing panel 17SRT aluminum alloy spar chord members for cracks. Unless special openings are installed, the outer panels may have to be removed to permit thorough inspection. If cracks are found, the members should be repaired or replaced in a manner satisfactory to the FAA. If replacement 24ST tubing is installed no further inspection will be necessary. Boeing Service Bulletin No. 1 of D-6134 describes a satisfactory method of installation of inspection openings in the lower surface of the outer wing. Boeing Service Bulletin No. 2 of D-6134 covers replacement of 17SRT spar chords with 24ST spar chords. 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.