A maintenance technician repositioned switches in the flight deck to conduct a test procedure; and a...

Narrative:

[I received] a pilot call for relamping first officer's FMC annunciator. Relamping was no help so I conducted a flight control system fault check. I noticed that the left FCC had a fault. After I reset the circuit breaker; the FMC annunciator started to work. [In order] to explain this to the captain and first officer I had to [position] the test switch (autopilot disengage) in disengage position and FMC switch on overhead on both on left and do the test again because they were not sure that they wanted to fly this airplane. I left assuming that the pilot saw the switches in test position and would restore them back to normal. All the correct positions of all switches on the overhead and on the center pedestal should be covered by the checklist. Otherwise if any switches are in the wrong position [this will] cause a problem.

Original NASA ASRS Text

Title: A Maintenance Technician repositioned switches in the flight deck to conduct a test procedure; and assumed that the pilots would recognize it and change them back to the normal position.

Narrative: [I received] a pilot call for relamping First Officer's FMC annunciator. Relamping was no help so I conducted a flight control system fault check. I noticed that the left FCC had a fault. After I reset the circuit breaker; the FMC annunciator started to work. [In order] to explain this to the Captain and First Officer I had to [position] the test switch (autopilot disengage) in disengage position and FMC switch on overhead on both on left and do the test again because they were not sure that they wanted to fly this airplane. I left assuming that the pilot saw the switches in test position and would restore them back to normal. All the correct positions of all switches on the overhead and on the center pedestal should be covered by the checklist. Otherwise if any switches are in the wrong position [this will] cause a problem.

Data retrieved from NASA's ASRS site as of July 2013 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.

Attributes
ACN	1121463
Time
Date	201310
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Light	Daylight
Aircraft 1
Make Model Name	B737-800
Operating Under FAR Part	Part 121
Flight Phase	Parked
Component
Aircraft Component	FMS/FMC
Person 1
Function	Technician
Qualification	Maintenance Airframe Maintenance Avionics Maintenance Powerplant
Experience	Maintenance Avionics 43 Maintenance Technician 43
Events
Anomaly	Deviation - Procedural Published Material / Policy

A maintenance technician repositioned switches in the flight deck to conduct a test procedure; and assumed that the pilots would recognize it and change them back to the normal position.