Missed approach due "indicator"
Flying as SLF about row 16 around 2200 last night into YSSY aboard a 737-400 heard odd resonance from around port main gear followed by about 102% N2 and a quick climb into the inky murk over the Pacific. Climbing through about 10,000 ft Capt Speaking advises slight problem with an indicator and they would be talking to Engineering... Then FO Dave comes down the aisle with his flashlight and starts ripping up carpet which seemed surreal. We then did the shake, rattle, half roll thing, presumably ring to shake free whatever was bothering them. Some time later after apparent attempts to recycle the gear and flaps several times, there's that nice thumping sound accompanied by customary slipstream whistle... sounded good, but Dave reappeared, counted windows past the exit and then ripped the carpet up some more, this time finding the insp hatch. Purser Mavis charges down and shouts into poor Dave's arse "he's got a green light and he wants you back!". Dave looks relieved, flustered. We land 40 min late.
Questions from this experience... What's the SOP if the gear is sticking? How often does this happen? I noted the rego and I'm not sure whether to avoid the equipment if I'm booked on it another time - or should I assume it will be all the safer for getting written up?
If the gear never came down, apart from praying, what is the advised procedure for bringing the SLF home?