AD 47-33-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Textron Aviation Inc. | Army AT-11 | Airworthiness Directives; Beech Models AT-11 and C18S Airplanes |
| aircraft | Textron Aviation Inc. | C18S | Airworthiness Directives; Beech Models AT-11 and C18S Airplanes |
Unsafe Condition
The absence of proper drain holes in the tail cone and fuselage bulkhead No. 15 may lead to inadequate drainage, potentially causing corrosion or structural damage.
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Required Actions
Add two drain holes in the tail cone and two 1/4-inch drain holes in fuselage bulkhead No. 15 as specified in Figure 2. Compliance with Beech Service Bulletin No. C18-7 is acceptable.
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Compliance Time
prior to certification or, if certificated, on next periodic inspection but not later than November 1, 1947
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Affected Aircraft
Textron Aviation Inc. Models AT-11 and C18S
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Federal Register Abstract
Tail Cone Drain Holes
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_47-33-03.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 47-33-03 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Beech Models AT-11 and C18S Airplanes Subject: Tail Cone Drain Holes Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Textron Aviation Inc. Model: Army AT-11 | C18S Product Type: Aircraft Product Subtype: Small Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 47-33-03 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 47-33-03 SUBJECT HEADING: Airworthiness Directives; Beech Models AT-11 and C18S Airplanes ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 47-33-03 BEECH: (Was Mandatory Note 5 of AD-757-2 and Mandatory Note 4 of AD- 582-2.) Applies to AT-11 and C18S Aircraft. To be accomplished prior to certification or, if certificated, on next periodic inspection but not later than November 1, 1947. In order to provide better tail cone drainage, add two drain holes in the tail cone and two 1/4-inch drain holes in the fuselage bulkhead No. 15 as shown in Figure 2. (Beech Service Bulletin No. C18-7 covers this same subject.) FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_47-33-03.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 47-33-03 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Beech Models AT-11 and C18S Airplanes Subject: Tail Cone Drain Holes Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Textron Aviation Inc. Model: Army AT-11 | C18S 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: 47-33-03 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 47-33-03 SUBJECT HEADING: Airworthiness Directives; Beech Models AT-11 and C18S Airplanes ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 47-33-03 BEECH: (Was Mandatory Note 5 of AD-757-2 and Mandatory Note 4 of AD- 582-2.) Applies to AT-11 and C18S Aircraft. To be accomplished prior to certification or, if certificated, on next periodic inspection but not later than November 1, 1947. In order to provide better tail cone drainage, add two drain holes in the tail cone and two 1/4-inch drain holes in the fuselage bulkhead No. 15 as shown in Figure 2. (Beech Service Bulletin No. C18-7 covers this same subject.) FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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