| AD Number | 47-51-02 | Status | Active |
| Effective Date | Not specified | Issue Date | Not specified |
| Docket Number | Unknown | Amendment | N/A |
| Product Type | ["Aircraft"] | Product Subtype | ["Large Airplane"] |
| CFR Part | --- - Part 39 | CFR Section | N/A |
| Citation | This information is not available. | ||
| Manufacturer(s) | Airlift International, Inc. Curtiss-Wright Corporation Flying Tiger Line, Inc. L. B. Smith Aircraft Corporation Skyways International Trading and Transport Co. Tempo Design Corporation |
| Model(s) | C-46A C-46D C-46F C-46R C-46E C-46A C-46D C-46E C-46F C-46A C-46D C-46F C-46F C-46/CW20-T Super C-46/CW20-T |
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 eachof 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.