AD 59-07-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | L. B. Smith Aircraft Corporation | C-46A | CURTISS-WRIGHT Model C46 Aircraft |
| aircraft | L. B. Smith Aircraft Corporation | C-46D | CURTISS-WRIGHT Model C46 Aircraft |
| aircraft | L. B. Smith Aircraft Corporation | C-46F | CURTISS-WRIGHT Model C46 Aircraft |
Unsafe Condition
The auxiliary hydraulic pump is unsatisfactory for use in compliance with the minimum gear retraction time.
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Required Actions
Remove the auxiliary hydraulic pump and motor from the hydraulic system and replace with a hydraulic by-pass system per L.B. Smith Aircraft Corporation Report No. RX5.130.01 or equivalent. Install Airplane Flight Manual Revision dated July 11, 1958.
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Compliance Time
not later than August 1, 1959
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Affected Aircraft
L. B. Smith C46/CW20-T aircraft not having the modification incorporated.
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Federal Register Abstract
Auxiliary Hydraulic Pump
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_59-07-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 59-07-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: CURTISS-WRIGHT Model C46 Aircraft Subject: Auxiliary Hydraulic Pump Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: L. B. Smith Aircraft Corporation Model: C-46A | C-46D | C-46F Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 59-07-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 59-07-02 SUBJECT HEADING: CURTISS-WRIGHT Model C46 Aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 59-07-02 CURTISS-WRIGHT: Applies to all L.B. Smith C46/CW20-T aircraft not having this modification incorporated. To be accomplished not later than August 1, 1959. Service experience has indicated that the auxiliary hydraulic pump is unsatisfactory for use in compliance with the minimum gear retraction time. To provide reliable continuous hydraulic pressure during landing gear retraction, the auxiliary hydraulic pump and motor must be removed from the hydraulic system and replaced by a hydraulic by-pass system in accordance with L. B. Smith Aircraft Corporation Report No. RX5.130.01 dated April 16, 1958, or an equivalent system. Airplane Flight Manual Revision, dated July 11, 1958, is required with this modification. (L. B. Smith Service Modification No. SM20T-6 dated June 23, 1958, covers this same subject.) FOOTER:
Document Text
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AD Final Rules - DRS_59-07-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 59-07-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: CURTISS-WRIGHT Model C46 Aircraft Subject: Auxiliary Hydraulic Pump Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: L. B. Smith Aircraft Corporation Model: C-46A | C-46D | C-46F 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: 59-07-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 59-07-02 SUBJECT HEADING: CURTISS-WRIGHT Model C46 Aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 59-07-02 CURTISS-WRIGHT: Applies to all L.B. Smith C46/CW20-T aircraft not having this modification incorporated. To be accomplished not later than August 1, 1959. Service experience has indicated that the auxiliary hydraulic pump is unsatisfactory for use in compliance with the minimum gear retraction time. To provide reliable continuous hydraulic pressure during landing gear retraction, the auxiliary hydraulic pump and motor must be removed from the hydraulic system and replaced by a hydraulic by-pass system in accordance with L. B. Smith Aircraft Corporation Report No. RX5.130.01 dated April 16, 1958, or an equivalent system. Airplane Flight Manual Revision, dated July 11, 1958, is required with this modification. (L. B. Smith Service Modification No. SM20T-6 dated June 23, 1958, covers this same subject.) FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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