Narrative:

Upon touchdown the #1 thrust reverser (TR) would not unlock initially. Deployed the #2 normally but had to pull three times to get the #1 TR to unlock. Both thrust levers were against the idle stop. Logbook entry made. This airplane had some other curious electrical issues this day that make me wonder if there has been a recent lightning strike or other electrical anomaly. Earlier; when we did our before start originating checklist; the first officer and I both recall verifying the autothrottle switch in the off position. However; upon being cleared for takeoff and advancing the thrust levers when I engaged toga; the autothrottles engaged and we found the switch in the on position. I could possibly have bumped the switch at some point; but I don't think I did. I certainly don't recall being close to it at any point. Later on; the TCAS failed on both transponders. I cycled the TCAS circuit breaker once and the system returned to normal. On the next leg we received a 'single FMC' message. I placed the FMC switch to 'both on 1'; stayed there for a moment and then back on both and the FMC system operated normally the remainder of the evening. I made no logbook entries on these issues as they were spurious; one time events; which corrected themselves so they couldn't be duplicated. When taken together though over the course of the three legs; it appears there may be some spurious electrical anomaly in the aircraft.

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Original NASA ASRS Text

Title: A recalcitrant left reverser on a B737-700 reminds the flight crew of previous spurious problems with the aircraft.

Narrative: Upon touchdown the #1 Thrust Reverser (TR) would not unlock initially. Deployed the #2 normally but had to pull three times to get the #1 TR to unlock. Both Thrust Levers were against the idle stop. Logbook entry made. This airplane had some other curious electrical issues this day that make me wonder if there has been a recent lightning strike or other electrical anomaly. Earlier; when we did our Before Start Originating checklist; the First Officer and I both recall verifying the autothrottle switch in the OFF position. However; upon being cleared for takeoff and advancing the thrust levers when I engaged TOGA; the autothrottles engaged and we found the switch in the ON position. I could possibly have bumped the switch at some point; but I don't think I did. I certainly don't recall being close to it at any point. Later on; the TCAS failed on both transponders. I cycled the TCAS circuit breaker once and the system returned to normal. On the next leg we received a 'Single FMC' message. I placed the FMC switch to 'Both on 1'; stayed there for a moment and then back on both and the FMC system operated normally the remainder of the evening. I made no logbook entries on these issues as they were spurious; one time events; which corrected themselves so they couldn't be duplicated. When taken together though over the course of the three legs; it appears there may be some spurious electrical anomaly in the aircraft.

Data retrieved from NASA's ASRS site as of April 2012 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.