INFLIGHT CHOPPER – 2531 lego guide 7 years ago BUILDING INSTRUCTIONS FOR 2531, INFLIGHT CHOPPER, City Special Products Set Number: 2531 Theme: City Special Products Launch Year: 1998 INFLIGHT CHOPPER – 2531 File Size – 1.1 Mb Description – BUILDING INSTR. FOR 2531Download INFLIGHT CHOPPER – 2531 building instruction Print Versions Building instructions labeled “NA” or “V39” may be printed on US standard letter size paper Building instructions labeled “IN” or “V29” may be printed on EU standard A4 paper