80-19-19 JET ELECTRONICS AND TECHNOLOGY, INC.: Amendment 39-3919. Applies to all Model DAC-2000 and DAC-7000 Area Navigation (RNAV) Systems.
Compliance is required as indicated unless already accomplished. To prevent possible conflict with other IFR traffic, accomplish the following:
Prior to next flight, install a placard (1/4" letters) adjacent to the control display unit to read as follows: "RNAV IFR OPERATION NOT AUTHORIZED."
Once these systems have been modified in accordance with Jet Service Bulletin No. SB501-1279-4, SB501-1280-4, or SB501-1207-10, as applicable, and an appropriate aircraft records entry made, the placard required by this AD may be removed.
This amendment becomes effective September 25, 1980, as to all persons except those to whom it was made immediately effective by airmail letter dated April 24, 1980, which contained this amendment.