Someone just sent me this link to a story with pictures about what happened to a United Airlines Boeing 767 that had just been refurbished with an all new interior and passenger entertainment system. It was sitting in the maintenance hangar in Chicago, almost ready to be released back to the line, when the hangar fire suppression system activated. It was the third erroneous activation of the system in as many weeks.
Now a hangar full of airplanes needs some serious firefighting capability. An airplane pulled in off the line with a problem may have thousands of pounds of jet fuel inside it, and a fire could kill dozens of workers. So this is not a sprinkler like the one in your office. This is an automatic deluge of thousand p.s.i. water cannons, blowing through eleven side windows and destroying the new interior, and the entertainment system. The list of resulting maintenance issues at the bottom of the page shows that the cockpit was also drenched, with radios and numerous avionics destroyed, including multiple computer display screens. Everything will need to be removed and cleaned, and a lot replaced, and likely the airplane will suffer from irritating avionics problems for years to come.
Word is that the fire system contract went to the lowest bidder.