AD 80-19-02

80-19-02 HILLER AVIATION: Amendment 39-3910. Applies to Hiller UH-12D and UH-12E (including 4-place) helicopters certificated in all categories which have been converted to turbine power under Soloy Conversions, Ltd. Supplemental Type Certificates SH177WE or SH178WE.

Compliance required within 500-hours operating time or 180 days, whichever occurs first, after the effective date of this AD.

To prevent engine, transmission, or driveline failure and the resultant loss of power, replace Soloy Part Number 560-2408-2 engine output coupling shaft with Soloy Part Number 660-2408-3 shaft in accordance with Soloy Service Bulletin Number 12-560 dated May, 21, 1980, or later FAA approved revisions.

Equivalent methods of compliance may be used when approved by the Chief, Engineering and Manufacturing Branch, FAA Northwest Region, 9010 East Marginal Way South, Seattle, Washington 98108.

The manufacturer's specifications and procedures identified and described in this directive are 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 these documents from the manufacturer, may obtain copies upon request to Soloy Conversions, Ltd., Post Office Box 60, Chehalis, Washington 98532. These documents may also be examined at FAA Northwest Region, 9010 East Marginal Way South, Seattle, Washington 98108.

This amendment becomes effective October 11, 1980.