EX-99 2 amac2003_11.htm EXHIBIT


WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
Series: AMAC.0311
Distribution Date: 04/26/2004
 
Class Cusip Orig Prin Bal Begin Prin Bal Int Rate Accrued Int Rate Paid Int Dist Prin Dist Int Shortfall Prin Loss Deferred Interest Int Reimbursed Unscheduled Int Prin Reimbursed Subsequent Recoveries Total Dist Ending Class Bal
A1 000780ML7 $97,300,000.00 $94,758,333.92 4.2500000000% 4.2500000000% $335,602.43 $577,279.55 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $912,881.98 $94,181,054.37
A2 000780MM5 $31,717,181.00 $30,888,667.07 5.5000000000% 5.5000000000% $141,573.06 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $141,573.06 $30,700,489.47
A3 000780MN3 $23,937,000.00 $23,937,000.00 5.5000000000% 5.5000000000% $109,711.25 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $109,711.25 $23,937,000.00
A4 000780MP8 $24,396,200.00 $24,396,200.00 5.5000000000% 5.5000000000% $111,815.92 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $111,815.92 $24,396,200.00
A5 000780MQ6 $3,297,333.00 $3,297,333.00 5.5000000000% 5.5000000000% $15,112.78 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $15,112.78 $3,297,333.00
A6 000780MR4 $13,080,887.00 $11,589,389.76 6.0000000000% 6.0000000000% $57,946.95 $1,288,103.86 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $1,346,050.81 $10,301,285.90
A7 000780MS2 $6,012,033.00 $6,012,033.00 6.0000000000% 6.0000000000% $30,060.17 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $30,060.17 $6,012,033.00
A8 000780MT0 $12,510,712.00 $12,510,712.00 6.0000000000% 6.0000000000% $62,553.56 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $62,553.56 $12,510,712.00
A9 000780MU7 $33,455,515.00 $33,455,515.00 6.0000000000% 6.0000000000% $167,277.58 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $167,277.58 $33,455,515.00
A10 000780MV5 $11,000,000.00 $9,745,767.80 6.0000000000% 6.0000000000% $48,728.84 $1,083,194.32 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $1,131,923.16 $8,662,573.48
A11 000780MW3 $3,000,000.00 $3,000,000.00 6.0000000000% 6.0000000000% $15,000.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $15,000.00 $3,000,000.00
A12 000780MX1 $6,000,000.00 $6,000,000.00 6.0000000000% 6.0000000000% $30,000.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $30,000.00 $6,000,000.00
A13 000780MY9 $7,732,650.00 $7,483,038.23 0.0000000000% 0.0000000000% $0.00 $215,572.57 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $215,572.57 $7,267,465.66
A14 000780MZ6 $35,213,000.00 $34,293,167.65 4.0000000000% 4.0000000000% $114,310.56 $208,918.24 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $323,228.80 $34,084,249.41
AP 000780NA0 $18,962,260.81 $18,651,283.37 0.0000000000% 0.0000000000% $0.00 $105,990.19 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $105,990.19 $18,545,293.18
AX 000780NB8 $22,226.24 $22,108.68 5.5000000000% 5.5000000000% $101.33 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $101.33 $22,088.70
M 000780NC6 $3,639,951.00 $3,615,285.20 5.5000000000% 5.5000000000% $16,570.06 $4,198.33 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $20,768.38 $3,611,086.87
B1 000780ND4 $1,668,310.00 $1,657,004.86 5.5000000000% 5.5000000000% $7,594.61 $1,924.23 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $9,518.84 $1,655,080.63
B2 000780NE2 $788,656.00 $783,311.75 5.5000000000% 5.5000000000% $3,590.18 $909.64 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $4,499.82 $782,402.11
B3 000780NG7 $424,660.00 $421,782.32 5.5000000000% 5.5000000000% $1,933.17 $489.80 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $2,422.97 $421,292.52
B4 000780NH5 $454,993.00 $451,909.77 5.5000000000% 5.5000000000% $2,071.25 $524.79 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $2,596.04 $451,384.98
B5 000780NJ1 $454,997.30 $451,914.04 5.5000000000% 5.5000000000% $2,071.27 $524.87 $0.00 $0.00 $0.00 $0.00 $0.00 $0.08 $0.00 $2,596.15 $451,389.25
R 000780NF9 $100.00 $0.00 0.0000000000% 0.0000000000% $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00
R_SYN XXXXXXXXX $0.00 $0.00 0.0000000000% 0.0000000000% $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00
A10_ROUND XXXXXXXXX $11,000,000.00 $9,745,000.00 6.0000000000% 6.0000000000% $48,725.00 $1,083,000.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $1,131,725.00 $8,662,000.00
A11_ROUND XXXXXXXXX $3,000,000.00 $3,000,000.00 6.0000000000% 6.0000000000% $15,000.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $15,000.00 $3,000,000.00
A12_ROUND XXXXXXXXX $6,000,000.00 $6,000,000.00 6.0000000000% 6.0000000000% $30,000.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $30,000.00 $6,000,000.00
Total   $303,329,258.11 $296,510,981.67     $1,273,624.95 $3,487,630.39 $0.00 $0.00 $0.00 $0.00 $0.00 $0.08 $0.00 $4,761,255.34 $293,023,351.36




WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
Series: AMAC.0311
Distribution Date: 04/26/2004
 
Class Orig Face Beg Bal Prin Loss Prin Reimbursed Subsequent Recoveries Deferred Interest Total Prin End Cert Pct End Cert Bal
A1 $97,300,000.00 $94,758,333.92 $0.00 $0.00 $0.00 $0.00 $577,279.55 0.9679450603 $94,181,054.37
A2 $31,717,181.00 $30,888,667.07 $0.00 $0.00 $0.00 $0.00 $0.00 0.9679450853 $30,700,489.47
A3 $23,937,000.00 $23,937,000.00 $0.00 $0.00 $0.00 $0.00 $0.00 1.0000000000 $23,937,000.00
A4 $24,396,200.00 $24,396,200.00 $0.00 $0.00 $0.00 $0.00 $0.00 1.0000000000 $24,396,200.00
A5 $3,297,333.00 $3,297,333.00 $0.00 $0.00 $0.00 $0.00 $0.00 1.0000000000 $3,297,333.00
A6 $13,080,887.00 $11,589,389.76 $0.00 $0.00 $0.00 $0.00 $1,288,103.86 0.7875066805 $10,301,285.90
A7 $6,012,033.00 $6,012,033.00 $0.00 $0.00 $0.00 $0.00 $0.00 1.0000000000 $6,012,033.00
A8 $12,510,712.00 $12,510,712.00 $0.00 $0.00 $0.00 $0.00 $0.00 1.0000000000 $12,510,712.00
A9 $33,455,515.00 $33,455,515.00 $0.00 $0.00 $0.00 $0.00 $0.00 1.0000000000 $33,455,515.00
A10 $11,000,000.00 $9,745,767.80 $0.00 $0.00 $0.00 $0.00 $1,083,194.32 0.7875066800 $8,662,573.48
A11 $3,000,000.00 $3,000,000.00 $0.00 $0.00 $0.00 $0.00 $0.00 1.0000000000 $3,000,000.00
A12 $6,000,000.00 $6,000,000.00 $0.00 $0.00 $0.00 $0.00 $0.00 1.0000000000 $6,000,000.00
A13 $7,732,650.00 $7,483,038.23 $0.00 $0.00 $0.00 $0.00 $215,572.57 0.9398415369 $7,267,465.66
A14 $35,213,000.00 $34,293,167.65 $0.00 $0.00 $0.00 $0.00 $208,918.24 0.9679450603 $34,084,249.41
AP $18,962,260.81 $18,651,283.37 $0.00 $0.00 $0.00 $0.00 $105,990.19 0.9780106584 $18,545,293.18
AX $22,226.24 $22,108.68 $0.00 $0.00 $0.00 $0.00 $0.00 0.9938118188 $22,088.70
M $3,639,951.00 $3,615,285.20 $0.00 $0.00 $0.00 $0.00 $4,198.33 0.9920701872 $3,611,086.87
B1 $1,668,310.00 $1,657,004.86 $0.00 $0.00 $0.00 $0.00 $1,924.23 0.9920701968 $1,655,080.63
B2 $788,656.00 $783,311.75 $0.00 $0.00 $0.00 $0.00 $909.64 0.9920701928 $782,402.11
B3 $424,660.00 $421,782.32 $0.00 $0.00 $0.00 $0.00 $489.80 0.9920701738 $421,292.52
B4 $454,993.00 $451,909.77 $0.00 $0.00 $0.00 $0.00 $524.79 0.9920701637 $451,384.98
B5 $454,997.30 $451,914.04 $0.00 $0.08 $0.00 $0.00 $524.87 0.9920701727 $451,389.25
R $100.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 0.0000000000 $0.00
R_SYN $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 0.0000000000 $0.00
A10_ROUND $11,000,000.00 $9,745,000.00 $0.00 $0.00 $0.00 $0.00 $1,083,000.00 0.7874545455 $8,662,000.00
A11_ROUND $3,000,000.00 $3,000,000.00 $0.00 $0.00 $0.00 $0.00 $0.00 1.0000000000 $3,000,000.00
A12_ROUND $6,000,000.00 $6,000,000.00 $0.00 $0.00 $0.00 $0.00 $0.00 1.0000000000 $6,000,000.00
Total $303,329,258.11 $296,510,981.67 $0.00 $0.08 $0.00 $0.00 $3,487,630.39 0.9660240268 $293,023,351.36




WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
Series: AMAC.0311
Distribution Date: 04/26/2004
PER $1000 DENOMINATION
Class Orig Face Beg Bal Prin Loss Prin Reimbursed Subsequent Recoveries Deferred Interest Total Prin End Cert Pct End Cert Bal
A1 $97,300,000.00 973.87804645 0.00000000 0.00000000 0.00000000 0.00000000 5.93298613 0.9679450603 967.94506033
A2 $31,717,181.00 973.87807164 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.9679450853 967.94508535
A3 $23,937,000.00 1,000.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 1.0000000000 1,000.00000000
A4 $24,396,200.00 1,000.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 1.0000000000 1,000.00000000
A5 $3,297,333.00 1,000.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 1.0000000000 1,000.00000000
A6 $13,080,887.00 885.97889119 0.00000000 0.00000000 0.00000000 0.00000000 98.47221064 0.7875066805 787.50668055
A7 $6,012,033.00 1,000.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 1.0000000000 1,000.00000000
A8 $12,510,712.00 1,000.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 1.0000000000 1,000.00000000
A9 $33,455,515.00 1,000.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 1.0000000000 1,000.00000000
A10 $11,000,000.00 885.97889091 0.00000000 0.00000000 0.00000000 0.00000000 98.47221091 0.7875066800 787.50668000
A11 $3,000,000.00 1,000.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 1.0000000000 1,000.00000000
A12 $6,000,000.00 1,000.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 1.0000000000 1,000.00000000
A13 $7,732,650.00 967.71976360 0.00000000 0.00000000 0.00000000 0.00000000 27.87822674 0.9398415369 939.84153686
A14 $35,213,000.00 973.87804646 0.00000000 0.00000000 0.00000000 0.00000000 5.93298611 0.9679450603 967.94506035
AP $18,962,260.81 983.60019182 0.00000000 0.00000000 0.00000000 0.00000000 5.58953339 0.9780106584 978.01065842
AX $22,226.24 994.71075630 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.9938118188 993.81181882
M $3,639,951.00 993.22359010 0.00000000 0.00000000 0.00000000 0.00000000 1.15340289 0.9920701872 992.07018721
B1 $1,668,310.00 993.22359753 0.00000000 0.00000000 0.00000000 0.00000000 1.15340075 0.9920701968 992.07019679
B2 $788,656.00 993.22359812 0.00000000 0.00000000 0.00000000 0.00000000 1.15340529 0.9920701928 992.07019283
B3 $424,660.00 993.22356709 0.00000000 0.00000000 0.00000000 0.00000000 1.15339330 0.9920701738 992.07017379
B4 $454,993.00 993.22356608 0.00000000 0.00000000 0.00000000 0.00000000 1.15340236 0.9920701637 992.07016372
B5 $454,997.30 993.22356418 0.00000000 0.00017583 0.00000000 0.00000000 1.15356728 0.9920701727 992.07017272
R $100.00 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.0000000000 0.00000000
R_SYN $0.00 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.0000000000 0.00000000
A10_ROUND $11,000,000.00 885.90909091 0.00000000 0.00000000 0.00000000 0.00000000 98.45454545 0.7874545455 787.45454545
A11_ROUND $3,000,000.00 1,000.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 1.0000000000 1,000.00000000
A12_ROUND $6,000,000.00 1,000.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 1.0000000000 1,000.00000000




WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
Series: AMAC.0311
Distribution Date: 04/26/2004
 
Class Orig Face Int Rate Accrued Int Rate Paid Beg Cert Prin/Not Bal Curent Int Accrued Int Shortfall Unscheduled Int Int Reimbursed Total Int Dist
A1 $97,300,000.00 4.2500000000% 4.2500000000% $94,758,333.92 $335,602.43 $0.00 $0.00 $0.00 $335,602.43
A2 $31,717,181.00 5.5000000000% 5.5000000000% $30,888,667.07 $141,573.06 $0.00 $0.00 $0.00 $141,573.06
A3 $23,937,000.00 5.5000000000% 5.5000000000% $23,937,000.00 $109,711.25 $0.00 $0.00 $0.00 $109,711.25
A4 $24,396,200.00 5.5000000000% 5.5000000000% $24,396,200.00 $111,815.92 $0.00 $0.00 $0.00 $111,815.92
A5 $3,297,333.00 5.5000000000% 5.5000000000% $3,297,333.00 $15,112.78 $0.00 $0.00 $0.00 $15,112.78
A6 $13,080,887.00 6.0000000000% 6.0000000000% $11,589,389.76 $57,946.95 $0.00 $0.00 $0.00 $57,946.95
A7 $6,012,033.00 6.0000000000% 6.0000000000% $6,012,033.00 $30,060.17 $0.00 $0.00 $0.00 $30,060.17
A8 $12,510,712.00 6.0000000000% 6.0000000000% $12,510,712.00 $62,553.56 $0.00 $0.00 $0.00 $62,553.56
A9 $33,455,515.00 6.0000000000% 6.0000000000% $33,455,515.00 $167,277.58 $0.00 $0.00 $0.00 $167,277.58
A10 $11,000,000.00 6.0000000000% 6.0000000000% $9,745,767.80 $48,728.84 $0.00 $0.00 $0.00 $48,728.84
A11 $3,000,000.00 6.0000000000% 6.0000000000% $3,000,000.00 $15,000.00 $0.00 $0.00 $0.00 $15,000.00
A12 $6,000,000.00 6.0000000000% 6.0000000000% $6,000,000.00 $30,000.00 $0.00 $0.00 $0.00 $30,000.00
A13 $7,732,650.00 0.0000000000% 0.0000000000% $7,483,038.23 $0.00 $0.00 $0.00 $0.00 $0.00
A14 $35,213,000.00 4.0000000000% 4.0000000000% $34,293,167.65 $114,310.56 $0.00 $0.00 $0.00 $114,310.56
AP $18,962,260.81 0.0000000000% 0.0000000000% $18,651,283.37 $0.00 $0.00 $0.00 $0.00 $0.00
AX $22,226.24 5.5000000000% 5.5000000000% $22,108.68 $101.33 $0.00 $0.00 $0.00 $101.33
M $3,639,951.00 5.5000000000% 5.5000000000% $3,615,285.20 $16,570.06 $0.00 $0.00 $0.00 $16,570.06
B1 $1,668,310.00 5.5000000000% 5.5000000000% $1,657,004.86 $7,594.61 $0.00 $0.00 $0.00 $7,594.61
B2 $788,656.00 5.5000000000% 5.5000000000% $783,311.75 $3,590.18 $0.00 $0.00 $0.00 $3,590.18
B3 $424,660.00 5.5000000000% 5.5000000000% $421,782.32 $1,933.17 $0.00 $0.00 $0.00 $1,933.17
B4 $454,993.00 5.5000000000% 5.5000000000% $451,909.77 $2,071.25 $0.00 $0.00 $0.00 $2,071.25
B5 $454,997.30 5.5000000000% 5.5000000000% $451,914.04 $2,071.27 $0.00 $0.00 $0.00 $2,071.27
R $100.00 0.0000000000% 0.0000000000% $0.00 $0.00 $0.00 $0.00 $0.00 $0.00
R_SYN $0.00 0.0000000000% 0.0000000000% $0.00 $0.00 $0.00 $0.00 $0.00 $0.00
A10_ROUND $11,000,000.00 6.0000000000% 6.0000000000% $9,745,000.00 $48,725.00 $0.00 $0.00 $0.00 $48,725.00
A11_ROUND $3,000,000.00 6.0000000000% 6.0000000000% $3,000,000.00 $15,000.00 $0.00 $0.00 $0.00 $15,000.00
A12_ROUND $6,000,000.00 6.0000000000% 6.0000000000% $6,000,000.00 $30,000.00 $0.00 $0.00 $0.00 $30,000.00
Total $303,329,258.11     $296,510,981.67 $1,273,624.95 $0.00 $0.00 $0.00 $1,273,624.95




WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
Series: AMAC.0311
Distribution Date: 04/26/2004
PER $1000 DENOMINATION
Class Orig Face Int Rate Accrued Int Rate Paid Beg Cert Prin/Not Bal Curent Int Accrued Int Shortfall Unscheduled Int Int Reimbursed Total Int Dist
A1 $97,300,000.00 4.2500000000% 4.2500000000% 973.87804645 3.44915139 0.00000000 0.00000000 0.00000000 3.44915139
A2 $31,717,181.00 5.5000000000% 5.5000000000% 973.87807164 4.46360791 0.00000000 0.00000000 0.00000000 4.46360791
A3 $23,937,000.00 5.5000000000% 5.5000000000% 1,000.00000000 4.58333333 0.00000000 0.00000000 0.00000000 4.58333333
A4 $24,396,200.00 5.5000000000% 5.5000000000% 1,000.00000000 4.58333347 0.00000000 0.00000000 0.00000000 4.58333347
A5 $3,297,333.00 5.5000000000% 5.5000000000% 1,000.00000000 4.58333447 0.00000000 0.00000000 0.00000000 4.58333447
A6 $13,080,887.00 6.0000000000% 6.0000000000% 885.97889119 4.42989455 0.00000000 0.00000000 0.00000000 4.42989455
A7 $6,012,033.00 6.0000000000% 6.0000000000% 1,000.00000000 5.00000083 0.00000000 0.00000000 0.00000000 5.00000083
A8 $12,510,712.00 6.0000000000% 6.0000000000% 1,000.00000000 5.00000000 0.00000000 0.00000000 0.00000000 5.00000000
A9 $33,455,515.00 6.0000000000% 6.0000000000% 1,000.00000000 5.00000015 0.00000000 0.00000000 0.00000000 5.00000015
A10 $11,000,000.00 6.0000000000% 6.0000000000% 885.97889091 4.42989455 0.00000000 0.00000000 0.00000000 4.42989455
A11 $3,000,000.00 6.0000000000% 6.0000000000% 1,000.00000000 5.00000000 0.00000000 0.00000000 0.00000000 5.00000000
A12 $6,000,000.00 6.0000000000% 6.0000000000% 1,000.00000000 5.00000000 0.00000000 0.00000000 0.00000000 5.00000000
A13 $7,732,650.00 0.0000000000% 0.0000000000% 967.71976360 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000
A14 $35,213,000.00 4.0000000000% 4.0000000000% 973.87804646 3.24626019 0.00000000 0.00000000 0.00000000 3.24626019
AP $18,962,260.81 0.0000000000% 0.0000000000% 983.60019182 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000
AX $22,226.24 5.5000000000% 5.5000000000% 994.71075630 4.55902573 0.00000000 0.00000000 0.00000000 4.55902573
M $3,639,951.00 5.5000000000% 5.5000000000% 993.22359010 4.55227557 0.00000000 0.00000000 0.00000000 4.55227557
B1 $1,668,310.00 5.5000000000% 5.5000000000% 993.22359753 4.55227745 0.00000000 0.00000000 0.00000000 4.55227745
B2 $788,656.00 5.5000000000% 5.5000000000% 993.22359812 4.55227628 0.00000000 0.00000000 0.00000000 4.55227628
B3 $424,660.00 5.5000000000% 5.5000000000% 993.22356709 4.55227712 0.00000000 0.00000000 0.00000000 4.55227712
B4 $454,993.00 5.5000000000% 5.5000000000% 993.22356608 4.55226784 0.00000000 0.00000000 0.00000000 4.55226784
B5 $454,997.30 5.5000000000% 5.5000000000% 993.22356418 4.55226877 0.00000000 0.00000000 0.00000000 4.55226877
R $100.00 0.0000000000% 0.0000000000% 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000
R_SYN $0.00 0.0000000000% 0.0000000000% 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000
A10_ROUND $11,000,000.00 6.0000000000% 6.0000000000% 885.90909091 4.42954545 0.00000000 0.00000000 0.00000000 4.42954545
A11_ROUND $3,000,000.00 6.0000000000% 6.0000000000% 1,000.00000000 5.00000000 0.00000000 0.00000000 0.00000000 5.00000000
A12_ROUND $6,000,000.00 6.0000000000% 6.0000000000% 1,000.00000000 5.00000000 0.00000000 0.00000000 0.00000000 5.00000000




WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
MASTER SERVICING
MORTGAGE PASS-THROUGH CERTIFICATES
04/2004 DISTRIBUTION REPORT
SERIES: AMAC 0311
WEIGHTED AVERAGE PC RATE: 5.15445%
WEIGHTED AVERAGE MATURITY: 350.24976
WEIGHTED AVERAGE LOAN AGE: 7.99728
POOL NUMBER: 2221
ISSUE DATE: 09/30/2003
CERTIFICATE BALANCE AT ISSUE: $303,329,258.11
  TOTAL NUMBER
OF MORTAGES
CERTIFICATE ACCOUNT
ACTIVITY (@ PCRATE)
CERTIFICATE BALANCE
OUTSTANDING
BALANCES FROM LAST FISCAL MONTH-END: 617   $296,510,981.68
PRINCIPAL POOL COLLECTION(S):      
Scheduled Principal Collection Due Current Month   $345,068.87  
Unscheduled Principal Collection/Reversals   $78,571.43  
Liquidations-in-full 7 $3,063,990.01  
Subsequent Recoveries   $0.00  
Net principal Distributed   $3,487,630.31 -$3,487,630.31
 
CAPITAL LOSS (PRINCIPAL WRITTEN OFF):     $0.00
 
BALANCE CURRENT FISCAL MONTH-END: 610   $293,023,351.37
 
SCHEDULED INTEREST AT MORTGAGE RATE:   $1,346,532.44  
 
UNSCHEDULED INTEREST AT MORTGAGE RATE:      
Unscheduled Interest Collection/Reversals   $0.00  
Interest Uncollected on Liquidation   $0.00  
Interest Uncollected on Non-Earning Assets   $0.00  
Net Unscheduled Interest Distributed   $0.00  
 
OTHER:      
Loan Conversion Fees   $0.00  
Expense Reimbursements   $0.00  
Gain on Liquidations   $0.00  
Hazard Insurance Premium Refunds   $0.00  
Recoveries Carried Forward   $0.00  
Net Other Distributions   $0.00  




WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
MASTER SERVICING
MORTGAGE PASS-THROUGH CERTIFICATES
04/2004 DISTRIBUTION REPORT
  TOTAL NUMBER
OF MORTAGES
CERTIFICATE ACCOUNT
ACTIVITY (@ PCRATE)
CERTIFICATE BALANCE
OUTSTANDING
SCHEDULED SERVICING FEE EXPENSES:   $72,907.41  
 
UNSCHEDULED SERVICING FEES:      
Unscheduled Service Fee Collections/Reversals   $0.00  
Servicing Fees Uncollected on Liquidation   $0.00  
Servicing Fees Uncollected/Non-Earning Assets   $0.00  
Net Unscheduled Service Fees Distributed   $0.00  
 
MISCELLANEOUS EXPENSES:   $0.00  
 
NET FUNDS DISTRIBUTED:   $4,761,255.34  




WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
MASTER SERVICING
MORTGAGE PASS-THROUGH CERTIFICATES
04/2004 DISTRIBUTION REPORT
SERIES: AMAC 0311
WEIGHTED AVERAGE PC RATE: 5.15445%
WEIGHTED AVERAGE MATURITY: 350.24976
WEIGHTED AVERAGE LOAN AGE: 7.99728
POOL NUMBER: ALL
ISSUE DATE: 09/30/2003
CERTIFICATE BALANCE AT ISSUE: $303,329,258.11
  TOTAL NUMBER
OF MORTAGES
CERTIFICATE ACCOUNT
ACTIVITY (@ PCRATE)
CERTIFICATE BALANCE
OUTSTANDING
BALANCES FROM LAST FISCAL MONTH-END: 617   $296,510,981.68
PRINCIPAL POOL COLLECTION(S):      
Scheduled Principal Collection Due Current Month   $345,068.87  
Unscheduled Principal Collection/Reversals   $78,571.43  
Liquidations-in-full 7 $3,063,990.01  
Subsequent Recoveries   $0.00  
Net principal Distributed   $3,487,630.31 -$3,487,630.31
 
CAPITAL LOSS (PRINCIPAL WRITTEN OFF):     $0.00
 
BALANCE CURRENT FISCAL MONTH-END: 610   $293,023,351.37
 
SCHEDULED INTEREST AT MORTGAGE RATE:   $1,346,532.44  
 
UNSCHEDULED INTEREST AT MORTGAGE RATE:      
Unscheduled Interest Collection/Reversals   $0.00  
Interest Uncollected on Liquidation   $0.00  
Interest Uncollected on Non-Earning Assets   $0.00  
Net Unscheduled Interest Distributed   $0.00  
 
OTHER:      
Loan Conversion Fees   $0.00  
Expense Reimbursements   $0.00  
Gain on Liquidations   $0.00  
Hazard Insurance Premium Refunds   $0.00  
Recoveries Carried Forward   $0.00  
Net Other Distributions   $0.00  




WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
MASTER SERVICING
MORTGAGE PASS-THROUGH CERTIFICATES
04/2004 DISTRIBUTION REPORT
  TOTAL NUMBER
OF MORTAGES
CERTIFICATE ACCOUNT
ACTIVITY (@ PCRATE)
CERTIFICATE BALANCE
OUTSTANDING
SCHEDULED SERVICING FEE EXPENSES:   $72,907.41  
 
UNSCHEDULED SERVICING FEES:      
Unscheduled Service Fee Collections/Reversals   $0.00  
Servicing Fees Uncollected on Liquidation   $0.00  
Servicing Fees Uncollected/Non-Earning Assets   $0.00  
Net Unscheduled Service Fees Distributed   $0.00  
 
MISCELLANEOUS EXPENSES:   $0.00  
 
NET FUNDS DISTRIBUTED:   $4,761,255.34  




WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
Series: AMAC.0311
Distribution Date: 04/26/2004
 
Distribution by Group
Pool ID Principal Interest Total  
Pool - 2221 $3,487,630.31 $1,273,625.03 $4,761,255.34  
Aggregate $3,487,630.31 $1,273,625.03 $4,761,255.34  
 
Number of Loans and Aggregate Principal Balance By Group
Pool ID Beg Bal Beg Count Paid Off / Liq Count Rem Count Sched Prin End Bal Sched Prin Prin PrePay / Liq Unsched Prin / Rev Total Prin
Pool - 2221 $296,510,981.68 617 7 610 $293,023,351.37 $345,068.87 $3,063,990.01 $78,571.43 $3,487,630.31
Aggregate $296,510,981.68 617 7 610 $293,023,351.37 $345,068.87 $3,063,990.01 $78,571.43 $3,487,630.31
 
Delinquency Information by Group
Pool ID 1 Month Count Sched End Balance 2 Months Count Sched End Balance 3 Months Count Sched End Balance 4 Months Count Sched End Balance  
Pool - 2221 0 $0.00 0 $0.00 0 $0.00 0 $0.00  
Aggregate 0 $0.00 0 $0.00 0 $0.00 0 $0.00  
 
Foreclosure and REO Information by Group
Pool ID Foreclosure Count Sched End Balance REO Count Sched End Balance
Pool - 2221 0 $0.00 0 $0.00
Aggregate 0 $0.00 0 $0.00
 
Aggregate Loss Amounts by Group
Pool ID Count Loss Amount  
Group 1(2221) 0 $0.00  
Aggregate 0 $0.00  




WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
Series: AMAC.0311
Distribution Date: 04/26/2004
 
INSURANCE RESERVES - Group 1(2221)
Insurance Type Original Balance Claims In Progress Claims Paid Coverage Adjustments Coverage Remaining
MPI $0.00 $0.00 $0.00 $0.00 $0.00
Special Hazard $3,033,292.00 $0.00 $0.00 $0.00 $3,033,292.00
Bankruptcy Bond
Single-Units $100,000.00 $0.00 $0.00 $0.00 $100,000.00
Multi-Units $0.00 $0.00 $0.00 $0.00 $0.00
Mortgage Repurchase $3,033,292.00 $0.00 $0.00 $0.00 $3,033,292.00
 
INSURANCE RESERVES - Aggregate
Insurance Type Original Balance Claims In Progress Claims Paid Coverage Adjustments Coverage Remaining
MPI $0.00 $0.00 $0.00 $0.00 $0.00
Special Hazard $3,033,292.00 $0.00 $0.00 $0.00 $3,033,292.00
Bankruptcy Bond
Single-Units $100,000.00 $0.00 $0.00 $0.00 $100,000.00
Multi-Units $0.00 $0.00 $0.00 $0.00 $0.00
Mortgage Repurchase $3,033,292.00 $0.00 $0.00 $0.00 $3,033,292.00




WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
Series: AMAC.0311
Distribution Date: 04/26/2004
 
The Group Subordinate Certificates provide, to the limited extent described in the Prospectus Supplement, credit support, as well as special hazard, bankruptcy, and fraud coverage to certain Certificates. The "Prospectus Supplement" is that certain Prospectus Supplement, dated September 24,2003 to that certain Prospectus Supplement, dated January 23,2003, to which certain certificates were offered. The special hazard, bankruptcy, and Fraud coverage (collectively, "Credit Enhancements") provided by the Subordinate certificates provide coverage to the Loans, subject to the conditions and limitations to payment specified thereunder.
 
The Class Principal Balances of each Class of the Class M,B1,B2,B3,B4,B5 Certificatesimmediately after the principal and interest distribution on 200404 are as follows:
Class Class Principal Balance
M $3,611,086.87
B1 $1,655,080.63
B2 $782,402.11
B3 $421,292.52
B4 $451,384.98
B5 $451,389.25
Total $7,372,636.36
Capitalized items used but not defined herein have the meanings ascribed to them in the Prospectus Supplement.
The amount of the special hazard coverage, bankruptcy coverage, and fraud coverage, as of the above referenced distribution date, is $3,033,292.00, $100,000.00, $3,033,292.00 respectively, and such coverages are referred to in the table above under the column "Insurance Type" as "special hazard," "bankruptcy bond," and "mortgage repurchase," respectively. However, no policy of insurance exists for any such coverage, notwithstanding the reference to "insurance."