page 107 Bombardier Inc. Annual Report 2003-04 12 ACCOUNTS PAYABLE AND ACCRUED LIABILITIES Product warranties Accounts payable and accrued liabilities were as follows as at January 31: Product warranties in the aerospace segment typically range from one to five years  except for structural warranties which extend up to  20 years  and from one to five years in the transportation segment.  The following table summarizes product warranty activity during the year ended January 31  2004: 2004 2003 Bombardier Accounts payable $2 849 $3 233 Sales incentives and related provisions 1 575 1 127 Warranty provision 1 236 1 269 Accrued liabilities 1 178 1 243 Payroll related liabilities 477 481 Severance and other involuntary termination obligations  237 148 Interest payable 153 177 Other  963 816 8 668 8 494 BC Accounts payable and accrued liabilities 111 130 Interest payable 57 88 Income taxes payable 25 4 Other 139 190 332 412 $9 000 $8 906 AEROSPACE TRANSPORTATION TOTAL Balance as at January 31  2003 $ 312 $ 957 $1 269 Current expense 171 556 727 Changes in estimates 106 (24) 82 Cash paid (235) (574) (809) Effect of foreign currency exchange rate changes (9) (24) (33) Balance as at January 31  2004 $ 345 $ 891 $1 236