AD 47-42-09

47-42-09 DOUGLAS: (Was Mandatory Note 6 of AD-781-1.) Applies to DC-6 Serial Numbers 42854, 42855, 42858 Through 42865, 42869 Through 42880, 42882 Through 42891, 43000 Through 43009, 43055 and 43056.

To be accomplished not later than next No. 3 inspection (or not later than next 150 hours for noncarrier operations).

Certain cases have been found where the aileron hinge plates at wing Stations 421, 485, 585, and 675 were fabricated from overgage stock resulting in an interference fit between the plate and the clevis fitting. The following hinge plates and fittings should be inspected to determine whether or not they conform with the tolerances listed below. If plates are found which exceed the widths noted below, they should be reworked with emery cloth to specified limits and touched up with zinc chromate primer. Fittings which have been installed over an oversize plate should be anodized and carefully inspected before being reinstalled.

Hinge

Station No. Plate Thickness Fitting Width 421 1 3320118 0.249 4334619 0.249

0.237

0.254 485 2 3323460 0.238* 4345756 0.334

0.243

0.350 585 3 3323461 0.311 4345755 0.311

0.297

0.316 575 4 3323462 0.249 4345754 0.249

0.237

0.254

*Thickness of 0.093 angle not included. Total thickness should not exceed 0.334.

(Douglas Service Letter A-214-529.004/RLT dated July 21, 1947, and attached sketches cover this same subject.)