GTX 330/33 with ADS-B Out
190-00734-11
Maintenance Manual with ICA
Rev. 1
8-2
8.4 GTX
TEST
Operation of the GTX 330/330D/33 or 33D Mode-S transponder is accomplished using either the
faceplate of the unit (on the GTX 330 series See Section 3.1) or a GTN 6XX/7XX unit (on the GTX 33
series). Refer to the operational documents listed in Table 2 and Table 3 for basic GTX 33 series
operation.
The integrated transponder/altitude reporting system must be verified in accordance with Title 14 of the
Code of Federal Regulations (14 CFR) §§ 91.411 and 91.413,
every 24 calendar months
, or any time the
transponder is removed/replaced/modified.
Additionally, the ADS-B Out parameters must be verified in accordance with Title 14 of the Code of
Federal Regulations (14 CFR) § 91.227 any time the position source (GPS) is replaced/modified.
The test is typically done as a ramp test using a transponder ramp test set, such as the IFR ATC-601A or
TIC TR-220 (S/W v5.30 or later). Specific instructions for operating the ramp tester are contained in the
applicable operator's manual.
Reference Part 43 Appendix F for testing criteria. The ramp test includes checks as follows:
1.
Reply Frequency
2.
Suppression
3.
Receiver Sensitivity
4.
Reply RF Output Power
5.
Mode S Diversity Channel Isolation (if applicable)
6.
Mode S Address
7.
Mode S Formats
8.
Mode S All-Call
9.
ATCRBS –Only All Call
10.
Squitter
Reference AC 43-6B and 14 CFR Part 43, Appendix E (c) for testing criteria. The ramp test includes
checks as follows:
1.
Altitude Reporting
Reference Advisory Circular 20-165A and 14 CFR Part 91.227 for the following ADS-B Out parameters:
1.
NAC
P
≥
8
2.
NIC
≥
7
3.
NACv
≥
1
4.
SIL
≥
3
5.
SDA
≥
2
6.
Ensure all 14 CFR 91.227(d) parameters are populated and transmitted.
If no other service is to be performed, continue to the return-to-service checks in Section 9.
The document reference is online, please check the correspondence between the online documentation and the printed version.
