AD 80-08-04

80-08-04 CHADWICK, INC.: Amendment 39-3736. Applies to all Hughes model 369 helicopters equipped with Chadwick model C-20 Auxiliary Fuel System installed as per STC SH129WE and Bell model 206 helicopters equipped with Chadwick, Inc. model C-22 Auxiliary Fuel System installed per STC SH139WE.

Compliance is required as indicated. To prevent a static discharge type of source ignition, accomplish the following:

A. Within 120 days after the effective date of this Airworthiness Directive, unless already accomplished, install the Chadwick, Inc. supplied appropriate bonding and grounding harness kit in accordance with Chadwick, Inc., Installation Instructions dated January 2, 1980, (for the C-20 installation) or December 27, 1979, (for the C-22 installation), or an equivalent modification approved by the Chief,

B. Conduct a continuity check every 100 hours time in service while equipped with the Chadwick, Inc. auxiliary fuel system, to assure proper grounding between attach points of bonding and grounding kits. Reference: AC 43.13.1A, Chapter 11, Section 3, Paragraph 452, Page 188.

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 Chadwick, Inc., 11969 Southwest Herman Road, Sherwood, Oregon 97140. These documents may also be examined at FAA Northwest Region, 9010 East Marginal Way South, Seattle, Washington 98108.

This amendment becomes effective April 17, 1980.