It was the very last sector of my final check ride to get my third stripe as a FO on B727. We were cruising FL 3xx. One of the bulbs (387?) of the green LH gear light was blown. I asked the Check CPT to change the bulb, he agreed. After pushing the light assy back I switched on the master annunciator lights test switch (without asking....)oops
All green gear lights on, all red gear lights on, all three low oil pressure warning lights on, plus some others, can't rememeber. My face became red, dark red...
The CPT wasn't amused, so was the FE...
Okay, check ride passed, because my flying wasn't bad, but lesson learned.
What I didn't know was that this happened a few times before on our fleet and somewhere it was written to do the master ann light test only on ground
