AD 47-51-02
final rule
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Airlift International, Inc. | Curtiss-Wright Corporation | Flying Tiger Line, Inc. | L. B. Smith Aircraft Corporation | Skyways International Trading and Transport Co. | Tempo Design Corporation | C-46A | CURTISS-WRIGHT Model C-46 Series Aircraft |
| aircraft | Airlift International, Inc. | Curtiss-Wright Corporation | Flying Tiger Line, Inc. | L. B. Smith Aircraft Corporation | Skyways International Trading and Transport Co. | Tempo Design Corporation | C-46D | CURTISS-WRIGHT Model C-46 Series Aircraft |
| aircraft | Airlift International, Inc. | Curtiss-Wright Corporation | Flying Tiger Line, Inc. | L. B. Smith Aircraft Corporation | Skyways International Trading and Transport Co. | Tempo Design Corporation | C-46F | CURTISS-WRIGHT Model C-46 Series Aircraft |
| aircraft | Airlift International, Inc. | Curtiss-Wright Corporation | Flying Tiger Line, Inc. | L. B. Smith Aircraft Corporation | Skyways International Trading and Transport Co. | Tempo Design Corporation | C-46R | CURTISS-WRIGHT Model C-46 Series Aircraft |
| aircraft | Airlift International, Inc. | Curtiss-Wright Corporation | Flying Tiger Line, Inc. | L. B. Smith Aircraft Corporation | Skyways International Trading and Transport Co. | Tempo Design Corporation | C-46E | CURTISS-WRIGHT Model C-46 Series Aircraft |
| aircraft | Airlift International, Inc. | Curtiss-Wright Corporation | Flying Tiger Line, Inc. | L. B. Smith Aircraft Corporation | Skyways International Trading and Transport Co. | Tempo Design Corporation | C-46/CW20-T | CURTISS-WRIGHT Model C-46 Series Aircraft |
| aircraft | Airlift International, Inc. | Curtiss-Wright Corporation | Flying Tiger Line, Inc. | L. B. Smith Aircraft Corporation | Skyways International Trading and Transport Co. | Tempo Design Corporation | Super C-46/CW20-T | CURTISS-WRIGHT Model C-46 Series Aircraft |
Unsafe Condition
The attachment bolts in the elevator hinges and the spring and trim tab bellcranks, located in the stabilizer, tend to loosen with resultant elongation of the holes and grooving of the bolts.
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Required Actions
Replace specific hinge bolts with NAS or AN bolts as specified, fabricate and install spacers between hub bearings, and install shoulder bushings in the bracket.
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Compliance Time
within 100 hours' time in service after the effective date of this amendment unless already accomplished
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Affected Aircraft
Curtiss-Wright Model C-46 Series Aircraft equipped with Horizontal Stabilizer and Elevator Assemblies, P/N's 20-110-5001 and 20-130-5701 respectively.
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Federal Register Abstract
Elevator Hinge Bolts
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_47-51-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 47-51-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: CURTISS-WRIGHT Model C-46 Series Aircraft Subject: Elevator Hinge Bolts Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Airlift International, Inc. | Curtiss-Wright Corporation | Flying Tiger Line, Inc. | L. B. Smith Air...Show more Model: C-46A | C-46D | C-46F | C-46R | C-46E | C-46/CW20-T | Super C-46/CW20-T 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: 47-51-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 47-51-02 SUBJECT HEADING: CURTISS-WRIGHT Model C-46 Series Aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 47-51-02 CURTISS-WRIGHT Applies to Model C-46 Series Aircraft Equipped with Horizontal Stabilizer and Elevator Assemblies, Curtiss-Wright P/N's 20-110-5001 and 20-130- 5701, Respectively. Compliance required within 100 hours' time in service after the effective date of this amendment unless already accomplished. The attachment bolts in the elevator hinges and the spring and trim tab bellcranks, located in the stabilizer, tend to loosen with resultant elongation of the holes and grooving of the bolts. 1. Replace the eight AN 5-14 hinge bolts on the 20-130-5701 elevator installation with NAS 55-14 or AN 175-14 bolts. 2. Replace the eight AN 4-26 bolts on the 20-130-5700 elevator installation with NAS 54-26 or AN 174-26 bolts. 3. Replace four AN 23-11A and two AN 23-12A bolts through 20-110-5020 or 20- 110-5112 blocks on each of the outboard stabilizer ribs with four NAS 53A-7 or AN 173-7A and two NAS 53A-10 or AN 173-10A bolts. Replace six existing bolts on each of the inboard hinges with NAS 53A-7 or AN 173-7A bolts. 4. Fabricate spacers from 24ST material having an O.D. of 0.590 to 0.594 inch, 1.562 plus 0.005, minus 0.000 inches in length and drill concentric hole lengthwise 0.250 inch in diameter. Install spacer between the two hub bearings on "Idler Assem-Elev Trim Tab" P/N 20- 530-5722 and "Idler Assem-Elev Trim Tab (L.H.)" P/N 20-530-5775 so that the AN 24 bolts attaching the idlers to their mating bracket may be so tightened as to prevent rotation of the bolt in the inner bearing race or in the holes of the bracket. 5. Fabricate 0.75 diameter X1.012 inches plus 0.005, minus 0.000 spacers (Curtiss P/N 20-530-5709-1201) from 24ST alclad and drill 0.250. Install these spacers between the two hub bearings in the 20-530-5709 spring tab bellcranks. 6. P/N 1007-D-4-250 shoulder bushings should be installed in each 20-130-5775-2 bracket. Revised December 28, 1964. FOOTER:
Document Text
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AD Final Rules - DRS_47-51-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 47-51-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: CURTISS-WRIGHT Model C-46 Series Aircraft Subject: Elevator Hinge Bolts Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Airlift International, Inc. | Curtiss-Wright Corporation | Flying Tiger Line, Inc. | L. B. Smith Air...Show more Model: C-46A | C-46D | C-46F | C-46R | C-46E | C-46/CW20-T | Super C-46/CW20-T 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: 47-51-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 47-51-02 SUBJECT HEADING: CURTISS-WRIGHT Model C-46 Series Aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 47-51-02 CURTISS-WRIGHT Applies to Model C-46 Series Aircraft Equipped with Horizontal Stabilizer and Elevator Assemblies, Curtiss-Wright P/N's 20-110-5001 and 20-130- 5701, Respectively. Compliance required within 100 hours' time in service after the effective date of this amendment unless already accomplished. The attachment bolts in the elevator hinges and the spring and trim tab bellcranks, located in the stabilizer, tend to loosen with resultant elongation of the holes and grooving of the bolts. 1. Replace the eight AN 5-14 hinge bolts on the 20-130-5701 elevator installation with NAS 55-14 or AN 175-14 bolts. 2. Replace the eight AN 4-26 bolts on the 20-130-5700 elevator installation with NAS 54-26 or AN 174-26 bolts. 3. Replace four AN 23-11A and two AN 23-12A bolts through 20-110-5020 or 20- 110-5112 blocks on each of the outboard stabilizer ribs with four NAS 53A-7 or AN 173-7A and two NAS 53A-10 or AN 173-10A bolts. Replace six existing bolts on each of the inboard hinges with NAS 53A-7 or AN 173-7A bolts. 4. Fabricate spacers from 24ST material having an O.D. of 0.590 to 0.594 inch, 1.562 plus 0.005, minus 0.000 inches in length and drill concentric hole lengthwise 0.250 inch in diameter. Install spacer between the two hub bearings on "Idler Assem-Elev Trim Tab" P/N 20- 530-5722 and "Idler Assem-Elev Trim Tab (L.H.)" P/N 20-530-5775 so that the AN 24 bolts attaching the idlers to their mating bracket may be so tightened as to prevent rotation of the bolt in the inner bearing race or in the holes of the bracket. 5. Fabricate 0.75 diameter X1.012 inches plus 0.005, minus 0.000 spacers (Curtiss P/N 20-530-5709-1201) from 24ST alclad and drill 0.250. Install these spacers between the two hub bearings in the 20-530-5709 spring tab bellcranks. 6. P/N 1007-D-4-250 shoulder bushings should be installed in each 20-130-5775-2 bracket. Revised December 28, 1964. FOOTER:
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Retrieved: Apr 8, 2026
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