What was found
AT FLIGHT LEVEL 220, RECEIVED A STRONG ODOR OF BURNING METAL, THIS CONTINUED FOR ABOUT 10 MINUTES. DECLARED AN EMERGENCY & LANDED. PERFORMED ETN-EM-72-034, NO DEFECTS NOTED AT THIS TIME. R & R NR 2 PACK ACM IAW AMM 21-51-03. OPS CHECKED GOOD.