A319
Flight Crew Air Transport Pilot (ATP)
Flight Crew Type 926
Situational Awareness
Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural Published Material / Policy
Flight Crew Overcame Equipment Problem
Human Factors
In climb out; my Captain was lowering his sun visor in anticipation of climbing through clouds and mistakenly turned off our Inertial Reference 1 (IR1) just like what was described in [a recent company] newsletter. QRH procedures were followed; and we arrested the climb and requested FL280 as final to avoid RVSM airspace. Options were discussed using great CRM and Dispatch was informed. We were flying to [a destination] where the weather was VFR and we kept a constant plan in case of emergency descent since we lost EGPWS. This is mostly an informational report since it is a known problem so that these incidents can be tracked and a fix may be found to this known risk.
A319 First Officer reported the Captain inadvertently turned off Inertial Reference system #1 while deploying the sun visor.