Garmin Diamond DA 40 Maintenance Manual page 114

7.5.3 GTX 33 Test
Operation of the GTX 33 Mode-S transponder is accomplished using the G1000 PFD. Refer to Garmin
part number 190-00324-00, G1000 for DA40 Cockpit Reference Guide, for basic operation. Perform a
basic operational check on the transponder.
The integrated transponder/altitude reporting system must be verified in accordance with Title 14 of the
Code of Federal Regulations (CFR) §§ 91.411 and 91.413. This test requires the use of a Mode S ramp
generator. Specific instructions for operating the ramp tester are contained in the applicable operator's
manual. Refer to Title 14 CFR Part 43 Appendix F for testing criteria.
If no other service is to be performed, continue to the return-to-service checks in Section 8.
Page 7-20 G1000/DA40 System Maintenance Manual
Revision 6 190-00303-03