AD 46-13-01
final rule
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Lockheed Aircraft Corporation | 18 | Airworthiness Directives; Lockheed Model 18 Series Aircraft |
Unsafe Condition
Longer ferrules on landing gear actuating cylinder flexible hose P/N 55252-3 may cause hose damage by the landing gear scissors.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Compare ferrule lengths when replacing hose P/N 55252-3. Insert an elbow between the hose and cylinder aft port if longer ferrules are found to prevent hose damage.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Lockheed Model 18 Series Aircraft, all serial numbers.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Landing Gear Hose Ferrules
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_46-13-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 46-13-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Lockheed Model 18 Series Aircraft Subject: Landing Gear Hose Ferrules Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Lockheed Aircraft Corporation Model: 18 Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 46-13-01 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 46-13-01 SUBJECT HEADING: Airworthiness Directives; Lockheed Model 18 Series Aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 46-13-01 LOCKHEED: (Was Service Note 2 of AD-723-2.) Applies to All Model 18 Aircraft. When replacing the landing gear actuating cylinder flexible hose, P/N 55252-3, the length of ferrules should be compared. If longer ferrules are found on the new hoses, an elbow should be inserted between the hose and the cylinder aft port, to prevent possible damage to the hose by the landing gear scissors. (Lockheed Service Letter No. 18-28, dated June 15, 1945, revised December 10, 1945, covers this same subject.) FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_46-13-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 46-13-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Lockheed Model 18 Series Aircraft Subject: Landing Gear Hose Ferrules Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Lockheed Aircraft Corporation Model: 18 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: 46-13-01 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 46-13-01 SUBJECT HEADING: Airworthiness Directives; Lockheed Model 18 Series Aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 46-13-01 LOCKHEED: (Was Service Note 2 of AD-723-2.) Applies to All Model 18 Aircraft. When replacing the landing gear actuating cylinder flexible hose, P/N 55252-3, the length of ferrules should be compared. If longer ferrules are found on the new hoses, an elbow should be inserted between the hose and the cylinder aft port, to prevent possible damage to the hose by the landing gear scissors. (Lockheed Service Letter No. 18-28, dated June 15, 1945, revised December 10, 1945, covers this same subject.) FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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