Instruction Manual

G1000 / GFC 700 System Maintenance Manual - 200/B200 Series King Air Page 7-13
190-00915-01 Revision 9
7.5.2 GTX 33( ) or GTX 3000 Test
Operation of the GTX () or GTX 3000 Mode-S transponder is accomplished using PFD 1, PFD 2 or the
MFD. Refer to G1000 in King Air 200/B200 Cockpit Reference Guide, listed in Table 1-2, for basic
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. 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 14 CFR Part 43
Appendices E and F for testing criteria.
Note that for GTX 33D or GTX 3000 units, the aircraft must be put on jacks to simulate an in-air
condition in order to test the Mode S diversity transmission channel isolation.
If no other service is to be performed, continue to the return-to-service checks in Section 8.
7.6 GDC 74B or GDC 7400 Air Data Computer
Original GDC unit is Reinstalled
No software or configuration loading is required if the removed GDC 74B or GDC 7400 is re-installed.
This does not include units that were returned for repair as their software and configuration files are
deleted during the repair testing process. Continue to GDC 74B or GDC 7400 Test (Section 7.6.1).
Original GDC unit Installed in Opposite Locations for Troubleshooting
No software loading is required if the original GDC #1 and GDC #2 are installed in opposite locations.
Continue to GDC 74B or GDC 7400 Test (Section 7.6.1).
New, Repaired or Exchange GDC unit is Installed
If a new, repaired or exchange GDC unit is installed, the correct software and configuration files must be
loaded to the unit. See Section 3.9, and then continue to GDC 74B or GDC 7400 Test (Section 7.6.1).
New GDC 74B Configuration Module is Installed
The correct configuration files must be loaded if the GDC 74B configuration module has been replaced.
See Section 3.9, and then continue to GDC 74B or GDC 7400 Test (Section 7.6.1).
7.6.1 Air Data Test (GDC 74B or GDC 7400)
The G1000 system must be maintained in accordance with the G1000 System Maintenance Manual listed
in Table 1-3 and appropriate regulations. When the GDC unit is tested in accordance with 14 CFR Part
43, Appendix E, note the following exceptions:
• For paragraph (b)(1)(i) Scale Error, use Table 7-5 of this section instead of Appendix E, Table I
• Do not perform paragraph (b)(1)(iv) Friction
• Do not perform paragraph (b)(1)(vi) Barametric Scale Error
The following Air Data Test is to be performed in addition to or in conjunction with any other regulated
tests. This test must be performed on both pilot and copilot systems with a calibrated Air Data Test Set
(ADTS) with a combined accuracy/repeatability specification of less than ±20 feet for the test altitude
range.
1. Perform pitot static system leak check of each system as described in the King Air 200 Series
Maintenance Manual, 34-00-00, with the following changes:
a. For the pitot leak check, set the air data test unit to an indicated airspeed of 200 knots with the
static system vented to ambient pressure conditions (ground). Pitot leak rate is not to exceed 1
knot in 1 minute.
b. For the static leak check, set the air data test set to 30,000 feet and an indicated airspeed of 120
knots. Static leak rate is not to exceed 300 feet in 1 minute.
2. Connect the pitot/static tester to the aircraft left and right pitot and static ports. Note that the
standby altimeter and airspeed indicator are connected to the copilot side pitot and static lines.