What you will study
Trace aiding and identify the installed generation
Follow AHRS, magnetometer, GNSS and air-data relationships to the actual displayed function. Keep GRS 77, GRS 79, GMU 44 and GMU 44B task applicability explicit; a shared unit-family name does not transfer historical test criteria to a different installed branch.
Turn magnetic and installation evidence into a useful next check
Connect recorded three-axis deviations and actual electrical-load timing. Separate unit retention, rack-to-airframe geometry and configuration-module identity. Retain failed vibration history and later installation changes instead of letting a new view or favorable status hide them.
Prepare and verify the named aircraft calibration
Distinguish main-AHRS calibration, left/right aircraft magnetometer direction and the separate heading-offset follow-up. Required setup and actual completed task evidence remain visible; selecting a calibration state does not perform physical work.
Understand the configured GI 275 and its battery evidence
Use the supplied Model 208/208B software 3.10 profiles to distinguish installed defaults from optional family capability. Interpret completed rundown, full-charge preparation, temperature-qualified repeat and restoration as separate requirements.
Complete the Rev A diagnostic learning path
Complete eight lesson checks, six prediction-and-Apply exercises, eight two-stage cases and six fixed records with 20 classifications before the 12-question independent review. The lab has 24 completion requirements; the review requires at least 80% and all eight critical decisions correct in one attempt. Pass the separate 40-question final with at least 32 correct. Online completion and supervised practical qualification remain separate.
Learning outcomes
- Identify the installed AHRS/magnetometer/software branch before applying a test criterion.
- Interpret aiding/status, timed magnetic and installation evidence without losing an unresolved finding.
- Select the source-qualified calibration and heading-offset evidence.
- Distinguish configured GI 275 function, completed battery endurance and final restoration.
Aircraft and course applicability
Advanced diagnostic study of the named Caravan GRS 77/79, GMU 44/44B and configured GI 275 branches using Cessna D2078 Revision 42, June 2024, and Garmin 190-02135-00 Revision 1, April 2017. Each exercise identifies the installed equipment and selected task. Historical GRS 79/GMU 44 criteria are not transferred to GMU 44B. The GI 275 examples use the actual supplied Model 208/208B software 3.10 profiles. Current applicable aircraft/supplier data and installation effectivity govern aircraft work. Supplied editions are identified study references, not a claim of source currency in October 2026. Online completion does not qualify physical calibration, battery work or aircraft release.
WWAOG provides independent training. Online completion records knowledge and simulation achievement; it does not replace observed practical qualification, employer authorization or applicable licensing. Use current aircraft-effective maintenance instructions for physical work.
