AD 55-16-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Martin-Marietta Corporation | 202 | MARTIN Models 202, 202A, and 404 Aircraft |
| aircraft | Martin-Marietta Corporation | 202A | MARTIN Models 202, 202A, and 404 Aircraft |
| aircraft | Martin-Marietta Corporation | 404 | MARTIN Models 202, 202A, and 404 Aircraft |
Unsafe Condition
Flexible hose components of propeller feathering lines forward of the firewall may fail due to damage from a powerplant fire, compromising fire-resistance integrity.
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Required Actions
Replace all flexible hose components of propeller feathering lines forward of the firewall with fire-resistant lines and fittings meeting current requirements, using acceptable hose assemblies such as Aeroquip 680-12S with protective sleeves, Resistoflex SSFR-3800-10, or Aeroquip 309009-12S.
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Compliance Time
By first scheduled engine change after November 1, 1955, but not later than November 1, 1956.
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Affected Aircraft
Martin-Marietta Corporation Models 202, 202A, and 404 aircraft equipped with Hamilton Standard propellers.
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Federal Register Abstract
Fire Resistant Prop. Feathering Lines
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_55-16-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 55-16-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: MARTIN Models 202, 202A, and 404 Aircraft Subject: Fire Resistant Prop. Feathering Lines Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Martin-Marietta Corporation Model: 202 | 202A | 404 Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 55-16-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 55-16-02 SUBJECT HEADING: MARTIN Models 202, 202A, and 404 Aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 55-16-02 MARTIN: Applies to Models 202, 202A, and 404 Aircraft Equipped With Hamilton Standard Propellers. Compliance required by first scheduled engine change after November 1, 1955, but not later than November 1, 1956. To increase the fire-resistance integrity of the propeller feathering system against damage by a powerplant fire, all flexible hose components of propeller feathering lines forward of the firewall must be replaced with lines and fittings which will meet current fire-resistant requirements. The following hose assemblies are considered acceptable for this application: (a) Aeroquip 680-12S hose assemblies with Aeroquip 304 protective sleeves over end fittings (Aeroquip assembly P/N 304000-12S). (b) Resistoflex SSFR-3800-10 hose assemblies utilizing -12 connections. (c) Aeroquip 309009-12S hose assemblies. FOOTER:
Document Text
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AD Final Rules - DRS_55-16-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 55-16-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: MARTIN Models 202, 202A, and 404 Aircraft Subject: Fire Resistant Prop. Feathering Lines Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Martin-Marietta Corporation Model: 202 | 202A | 404 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: 55-16-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 55-16-02 SUBJECT HEADING: MARTIN Models 202, 202A, and 404 Aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 55-16-02 MARTIN: Applies to Models 202, 202A, and 404 Aircraft Equipped With Hamilton Standard Propellers. Compliance required by first scheduled engine change after November 1, 1955, but not later than November 1, 1956. To increase the fire-resistance integrity of the propeller feathering system against damage by a powerplant fire, all flexible hose components of propeller feathering lines forward of the firewall must be replaced with lines and fittings which will meet current fire-resistant requirements. The following hose assemblies are considered acceptable for this application: (a) Aeroquip 680-12S hose assemblies with Aeroquip 304 protective sleeves over end fittings (Aeroquip assembly P/N 304000-12S). (b) Resistoflex SSFR-3800-10 hose assemblies utilizing -12 connections. (c) Aeroquip 309009-12S hose assemblies. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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