AD 47-42-09
final rule
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | DC-6 | Airworthiness Directives; DOUGLAS DC-6 |
| aircraft | The Boeing Company | DC-6A | Airworthiness Directives; DOUGLAS DC-6 |
| aircraft | The Boeing Company | DC-6B | Airworthiness Directives; DOUGLAS DC-6 |
Unsafe Condition
Aileron hinge plates at wing Stations 421, 485, 585, and 675 were fabricated from overgage stock, causing an interference fit between the plate and the clevis fitting.
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Required Actions
Inspect hinge plates and fittings at specified stations to ensure they conform to specified tolerances. Rework plates exceeding width limits with emery cloth and apply zinc chromate primer. Anodize fittings installed over oversize plates and inspect before reinstallation.
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Compliance Time
not later than next No. 3 inspection (or not later than next 150 hours for noncarrier operations)
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Affected Aircraft
Douglas DC-6, DC-6A, DC-6B models with serial numbers 42854, 42855, 42858 through 42865, 42869 through 42880, 42882 through 42891, 43000 through 43009, 43055, and 43056.
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Federal Register Abstract
Aileron Hinge Plates
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_47-42-09.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 47-42-09 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; DOUGLAS DC-6 Subject: Aileron Hinge Plates Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: The Boeing Company Model: DC-6 | DC-6A | DC-6B Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 47-42-09 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 47-42-09 SUBJECT HEADING: Airworthiness Directives; DOUGLAS DC-6 ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 47-42-09 DOUGLAS: (Was Mandatory Note 6 of AD-781-1.) Applies to DC-6 Serial Numbers 42854, 42855, 42858 Through 42865, 42869 Through 42880, 42882 Through 42891, 43000 Through 43009, 43055 and 43056. To be accomplished not later than next No. 3 inspection (or not later than next 150 hours for noncarrier operations). Certain cases have been found where the aileron hinge plates at wing Stations 421, 485, 585, and 675 were fabricated from overgage stock resulting in an interference fit between the plate and the clevis fitting. The following hinge plates and fittings should be inspected to determine whether or not they conform with the tolerances listed below. If plates are found which exceed the widths noted below, they should be reworked with emery cloth to specified limits and touched up with zinc chromate primer. Fittings which have been installed over an oversize plate should be anodized and carefully inspected before being reinstalled. Hinge Station No. Plate Thickness Fitting Width 421 1 3320118 0.249 4334619 0.249 0.237 0.254 485 2 3323460 0.238* 4345756 0.334 0.243 0.350 585 3 3323461 0.311 4345755 0.311 0.297 0.316 575 4 3323462 0.249 4345754 0.249 0.237 0.254 *Thickness of 0.093 angle not included. Total thickness should not exceed 0.334. (Douglas Service Letter A-214-529.004/RLT dated July 21, 1947, and attached sketches cover this same subject.) FOOTER:
Document Text
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AD Final Rules - DRS_47-42-09.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 47-42-09 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; DOUGLAS DC-6 Subject: Aileron Hinge Plates Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: The Boeing Company Model: DC-6 | DC-6A | DC-6B 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: 47-42-09 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 47-42-09 SUBJECT HEADING: Airworthiness Directives; DOUGLAS DC-6 ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 47-42-09 DOUGLAS: (Was Mandatory Note 6 of AD-781-1.) Applies to DC-6 Serial Numbers 42854, 42855, 42858 Through 42865, 42869 Through 42880, 42882 Through 42891, 43000 Through 43009, 43055 and 43056. To be accomplished not later than next No. 3 inspection (or not later than next 150 hours for noncarrier operations). Certain cases have been found where the aileron hinge plates at wing Stations 421, 485, 585, and 675 were fabricated from overgage stock resulting in an interference fit between the plate and the clevis fitting. The following hinge plates and fittings should be inspected to determine whether or not they conform with the tolerances listed below. If plates are found which exceed the widths noted below, they should be reworked with emery cloth to specified limits and touched up with zinc chromate primer. Fittings which have been installed over an oversize plate should be anodized and carefully inspected before being reinstalled. Hinge Station No. Plate Thickness Fitting Width 421 1 3320118 0.249 4334619 0.249 0.237 0.254 485 2 3323460 0.238* 4345756 0.334 0.243 0.350 585 3 3323461 0.311 4345755 0.311 0.297 0.316 575 4 3323462 0.249 4345754 0.249 0.237 0.254 *Thickness of 0.093 angle not included. Total thickness should not exceed 0.334. (Douglas Service Letter A-214-529.004/RLT dated July 21, 1947, and attached sketches cover this same subject.) FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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