B777-200
Human-Machine Interface; Other / Unknown
Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural Maintenance; Deviation / Discrepancy - Procedural Published Material / Policy
General Maintenance Action
Aircraft; Human Factors; Procedure
Captain reported that the CPDLC [Controller-Pilot Data Link Communications] accept and reject buttons were switched; this caused 2 occasions of erroneous reject responses being sent to ATC. On arrival switches were confirmed in the wrong place (IPC (Illustrated Parts Catalog) 31-10-51-02) and switched back (SWPM (Standard Wiring Practices Manual) 20-84-13). This report is to raise awareness that these switches can be inadvertently transposed.
Maintenance reported that CPDLC buttons were reversed.