AD 78-03-01

78-03-01 BELL 47 SERIES AS MODIFIED BY STC SH357SW: Amendment 39- 3131. To preclude failure of the hopper upper support bracket, accomplish the following:

Within the next 25 hours flight time and at each 25 flight hours thereafter, inspect the hopper upper support bracket (P/N B630224) for cracks and/or deformation. If cracks and/or deformation are found, replace or repair. Inspections may be discontinued upon installation of Simplex Modification No. E201 (See Fig. 1), or equivalent modification or repair approved by an FAA Maintenance Inspector.

The manufacturer's repair, identified and described in this directive is incorporated herein and made a part hereof pursuant to 5 U.S.C. 552(a)(1).

All persons affected by this directive who have not already received the repair documents from the manufacturer, may obtain copies upon request to Simplex Manufacturing Company, 5224 N.E. 42nd Avenue, Portland, Oregon 97218. This repair document may also be examined at FAA Northwest Region, 9010 E. Marginal Way South, Seattle, Washington 98108.

This amendment becomes effective March 6, 1978.