GFC 600 AFCS Part 23 AML STC Maintenance Manual Page 19
190-01938-00 Revision 13
4.5.3 Electrical Bonding Procedure
Using one of the two measurement methods in Section 4.5.2 record the bonding measurement
for the following equipment. Some equipment in the list is optional and may not be installed.
Ensure that the measurements do not exceed the values shown in Table 2-2. If the values
exceed those listed, perform the reconditioning procedure in Section 2.4.
• GMC 605 case: __________ mΩ
• GI 285 case: __________ mΩ
• GSA 87/80/81 (Roll) chassis: __________ mΩ
• GSA 87/80/81 (Pitch) chassis: __________ mΩ
• GSA 87/80/81 (Pitch Trim) chassis: __________ mΩ
• GSA 87/80/81 (Yaw Damper) chassis: __________ mΩ
• GSA 87 (Yaw Trim) chassis: : __________ mΩ
• GTA 82 (Trim Adapter) chassis: __________ mΩ
• GSM 86 (Roll) chassis: __________ mΩ
• GSM 86 (Pitch) chassis: __________ mΩ
• GSM 86 (Pitch Trim) chassis: __________ mΩ
• GSM 86 (Yaw Damper) chassis: __________ mΩ
4.6 Sonalert Functional Test
If a Sonalert is installed, perform the Sonalert Functional Test at the intervals specified in Table
4-1.
1. Apply external electrical power to the aircraft and avionics systems.
2. Ensure that the GFC 600 AFCS passes PFT.
3. Engage the autopilot by pressing the AP button on the GMC 605.
4. Disengage the autopilot by pressing the AP DISC/TRIM INT switch on the pilot’s flight
controls.
5. Verify that the normal autopilot disconnect tone plays through the sonalert. NOTE: The
normal autopilot disconnect sonalert tone is a continuous 2000 Hz tone that plays for
approximately 10 seconds.
6. Engage the autopilot by pressing the AP button on the GMC 605.
7. Pull the AUTOPILOT circuit breaker.
8. Verify that the abnormal autopilot disconnect tone plays through the sonalert until the
GMC 605 powers down completely. NOTE: The abnormal autopilot disconnect sonalert
tone is a continuous 2000 Hz tone.