Section 1. GROUND OPERATIONAL CHECKS FOR …
9/27/01AC CHG 1Par 12-38Page 12-13SECTION 3. GROUND OPERATIONAL CHECKS FOR avionics equipment (NON ELECTRICAL)12-37. COMPASS SWING must be per-formed whenever any ferrous component ofthe system ( flux valve compensator, orStandby Compass) is installed, removed, re-paired, or a new compass is installed. Themagnetic compass can be checked for accuracyby using a compass rose located on an compass swing is normally effected byplacing the aircraft on various magnetic head-ings and comparing the deviations with thoseon the deviation cards. Refer to CFR14, , 14 CFR , and the equipmentor aircraft manufacturer's A compass swing must be performed onthe following occasions:(1) When the accuracy of the compassis suspected.(2) After any cockpit modification ormajor replacement involving ferrous metal.(3) Whenever a compass has been sub-jected to a shock; for example, after a hardlanding or turbulence.
9/27/01 AC 43.13-1B CHG 1 Par 12-38 Page 12-13 SECTION 3. GROUND OPERATIONAL CHECKS FOR AVIONICS EQUIPMENT (NON ELECTRICAL) 12-37. COMPASS SWING must be per- formed whenever any ferrous component of
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