Regional Jet 700 ER/LR (CRJ700)
Flight Crew Air Transport Pilot (ATP)
Communication Breakdown; Confusion; Situational Awareness; Training / Qualification
Aircraft Equipment Problem Critical; Deviation / Discrepancy - Procedural FAR; Deviation / Discrepancy - Procedural Maintenance; Deviation / Discrepancy - Procedural Published Material / Policy
Incorrect / Not Installed / Unavailable Part; Procedure; Aircraft; Human Factors
March 2012; Flights ABCD and ABBE were both operated with the [same] issue; without notice until halfway through Flight YYY when the Flight Attendant (F/A) notified me that Row 10-CD had two speaker panels and Row 9-CD had two [Passenger] Oxygen (O2) panels. Which means that Row 10-CD would not have had O2 if there had been an emergency. During some kind of maintenance; the panels of O2 and speaker panes were installed wrong.
A Pilot reports a Flight Attendant notified him halfway through their second flight that Row 10-CD had two speaker panes and Row 9-CD had two Oxygen (O2) panels on their CRJ-700 aircraft.  If an emergency had occurred; Oxygen would not have been available to passengers in Row 10-CD.