NWA appear to have thought about this...
Latest from USA Today...
Airline Mechanics Fraternal Association (AMFA) members still on the job at the strike deadline — 12:01 a.m. ET Saturday — quietly and quickly walked away from their posts and turned in their IDs and security badges before joining fellow union members on the picket lines.
But the nation's fourth-largest carrier said it has been preparing for the strike for more than a year and a half. Last week Northwest said it has 1,200 such replacements and 300 maintenance managers available for day-to-day repairs. Meanwhile, Northwest negotiated contracts with third-party maintenance vendors, both in the United States and overseas, to take on more heavy overhaul and component repair work. Most of those vendors, including KLM, the Dutch carrier that has been Northwest's long-time alliance partner, already handle much of that work for Northwest.
As a result, the strike appeared to have little impact on Northwest's operations as of late Saturday morning. The airline's busiest airports reported only a handful of delays or cancellations.