EX-99 3 amac2003_13.htm EXHIBIT


WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
Series: AMAC.0313
Distribution Date: 03/25/2004
 
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 000780NX0 $40,000,000.00 $39,837,671.76 5.5000000000% 5.5000000000% $182,589.33 $1,117,574.01 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $1,300,163.34 $38,720,097.75
A2 000780NY8 $28,373,000.00 $28,150,208.10 5.5000000000% 5.5000000000% $129,021.79 $112,162.38 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $241,184.17 $28,038,045.72
A3 000780NZ5 $24,249,000.00 $24,471,791.90 5.5000000000% 5.5000000000% $112,162.38 ($112,162.38) $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $24,583,954.28
A4 000780PA8 $29,323,850.00 $29,323,850.00 5.5000000000% 5.5000000000% $134,400.98 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $134,400.98 $29,323,850.00
A5 000780PP5 $2,210,139.00 $807,858.07 5.5000000000% 5.5000000000% $3,702.68 $807,858.07 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $811,560.75 $0.00
A6 000780PQ3 $207,487,020.00 $199,796,069.40 5.5000000000% 5.5000000000% $915,731.98 $9,464,601.95 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $10,380,333.94 $190,331,467.45
A7 000780PR1 $4,878,279.00 $4,878,279.00 5.5000000000% 5.5000000000% $22,358.78 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $22,358.78 $4,878,279.00
A8 000780PS9 $5,000,000.00 $4,814,664.29 5.2500000000% 5.2500000000% $21,064.16 $228,076.96 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $249,141.12 $4,586,587.33
A9 000780PT7 $500,000.00 $481,466.43 1.5750000000% 1.5750000000% $631.92 $22,807.70 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $23,439.62 $458,658.73
A10 000780PU4 $500,000.00 $481,466.43 6.4250000000% 6.4250000000% $2,577.85 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $2,577.85 $458,658.73
AP 000780PB6 $2,193,666.68 $2,188,123.31 0.0000000000% 0.0000000000% $0.00 $4,643.75 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $4,643.75 $2,183,479.55
AX 000780PC4 $236,623.75 $196,486.05 5.5000000000% 5.5000000000% $900.56 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $900.56 $175,310.26
M 000780PD2 $5,497,510.00 $5,486,387.52 5.5000000000% 5.5000000000% $25,145.94 $5,615.35 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $30,761.30 $5,480,772.17
B1 000780PE0 $2,128,068.00 $2,123,762.52 5.5000000000% 5.5000000000% $9,733.91 $2,173.68 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $11,907.60 $2,121,588.84
B2 000780PF7 $1,064,034.00 $1,061,881.26 5.5000000000% 5.5000000000% $4,866.96 $1,086.84 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $5,953.80 $1,060,794.42
B3 000780PH3 $709,356.00 $707,920.84 5.5000000000% 5.5000000000% $3,244.64 $724.56 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $3,969.20 $707,196.28
B4 000780PJ9 $532,017.00 $530,940.63 5.5000000000% 5.5000000000% $2,433.48 $543.42 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $2,976.90 $530,397.21
B5 000780PK6 $532,018.07 $530,941.70 5.5000000000% 5.5000000000% $2,433.48 $543.36 $0.00 $0.03 $0.00 $0.00 $0.00 $0.00 $0.00 $2,976.84 $530,398.31
R 000780PG5 $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
Total   $354,678,057.75 $345,191,816.73     $1,573,000.82 $11,656,249.67 $0.00 $0.03 $0.00 $0.00 $0.00 $0.00 $0.00 $13,229,250.49 $333,535,567.03




WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
Series: AMAC.0313
Distribution Date: 03/25/2004
 
Class Orig Face Beg Bal Prin Loss Prin Reimbursed Subsequent Recoveries Deferred Interest Total Prin End Cert Pct End Cert Bal
A1 $40,000,000.00 $39,837,671.76 $0.00 $0.00 $0.00 $0.00 $1,117,574.01 0.9680024438 $38,720,097.75
A2 $28,373,000.00 $28,150,208.10 $0.00 $0.00 $0.00 $0.00 $112,162.38 0.9881946118 $28,038,045.72
A3 $24,249,000.00 $24,471,791.90 $0.00 $0.00 $0.00 $0.00 ($112,162.38) 1.0138131172 $24,583,954.28
A4 $29,323,850.00 $29,323,850.00 $0.00 $0.00 $0.00 $0.00 $0.00 1.0000000000 $29,323,850.00
A5 $2,210,139.00 $807,858.07 $0.00 $0.00 $0.00 $0.00 $807,858.07 0.0000000000 $0.00
A6 $207,487,020.00 $199,796,069.40 $0.00 $0.00 $0.00 $0.00 $9,464,601.95 0.9173174662 $190,331,467.45
A7 $4,878,279.00 $4,878,279.00 $0.00 $0.00 $0.00 $0.00 $0.00 1.0000000000 $4,878,279.00
A8 $5,000,000.00 $4,814,664.29 $0.00 $0.00 $0.00 $0.00 $228,076.96 0.9173174660 $4,586,587.33
A9 $500,000.00 $481,466.43 $0.00 $0.00 $0.00 $0.00 $22,807.70 0.9173174600 $458,658.73
A10 $500,000.00 $481,466.43 $0.00 $0.00 $0.00 $0.00 $0.00 0.9173174600 $458,658.73
AP $2,193,666.68 $2,188,123.31 $0.00 $0.00 $0.00 $0.00 $4,643.75 0.9953561176 $2,183,479.55
AX $236,623.75 $196,486.05 $0.00 $0.00 $0.00 $0.00 $0.00 0.7408819275 $175,310.26
M $5,497,510.00 $5,486,387.52 $0.00 $0.00 $0.00 $0.00 $5,615.35 0.9969553798 $5,480,772.17
B1 $2,128,068.00 $2,123,762.52 $0.00 $0.00 $0.00 $0.00 $2,173.68 0.9969553792 $2,121,588.84
B2 $1,064,034.00 $1,061,881.26 $0.00 $0.00 $0.00 $0.00 $1,086.84 0.9969553792 $1,060,794.42
B3 $709,356.00 $707,920.84 $0.00 $0.00 $0.00 $0.00 $724.56 0.9969553792 $707,196.28
B4 $532,017.00 $530,940.63 $0.00 $0.00 $0.00 $0.00 $543.42 0.9969553792 $530,397.21
B5 $532,018.07 $530,941.70 $0.03 $0.00 $0.00 $0.00 $543.36 0.9969554418 $530,398.31
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
Total $354,678,057.75 $345,191,816.73 $0.03 $0.00 $0.00 $0.00 $11,656,249.67 0.9403896287 $333,535,567.03




WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
Series: AMAC.0313
Distribution Date: 03/25/2004
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 $40,000,000.00 995.94179400 0.00000000 0.00000000 0.00000000 0.00000000 27.93935025 0.9680024438 968.00244375
A2 $28,373,000.00 992.14774962 0.00000000 0.00000000 0.00000000 0.00000000 3.95313784 0.9881946118 988.19461178
A3 $24,249,000.00 1,009.18767372 0.00000000 0.00000000 0.00000000 0.00000000 -4.62544352 1.0138131172 1,013.81311724
A4 $29,323,850.00 1,000.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 1.0000000000 1,000.00000000
A5 $2,210,139.00 365.52364806 0.00000000 0.00000000 0.00000000 0.00000000 365.52364806 0.0000000000 0.00000000
A6 $207,487,020.00 962.93285913 0.00000000 0.00000000 0.00000000 0.00000000 45.61539295 0.9173174662 917.31746617
A7 $4,878,279.00 1,000.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 1.0000000000 1,000.00000000
A8 $5,000,000.00 962.93285800 0.00000000 0.00000000 0.00000000 0.00000000 45.61539200 0.9173174660 917.31746600
A9 $500,000.00 962.93286000 0.00000000 0.00000000 0.00000000 0.00000000 45.61540000 0.9173174600 917.31746000
A10 $500,000.00 962.93286000 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.9173174600 917.31746000
AP $2,193,666.68 997.47301172 0.00000000 0.00000000 0.00000000 0.00000000 2.11688952 0.9953561176 995.35611764
AX $236,623.75 830.37332474 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 0.7408819275 740.88192753
M $5,497,510.00 997.97681496 0.00000000 0.00000000 0.00000000 0.00000000 1.02143516 0.9969553798 996.95537980
B1 $2,128,068.00 997.97681277 0.00000000 0.00000000 0.00000000 0.00000000 1.02143353 0.9969553792 996.95537925
B2 $1,064,034.00 997.97681277 0.00000000 0.00000000 0.00000000 0.00000000 1.02143353 0.9969553792 996.95537925
B3 $709,356.00 997.97681277 0.00000000 0.00000000 0.00000000 0.00000000 1.02143353 0.9969553792 996.95537925
B4 $532,017.00 997.97681277 0.00000000 0.00000000 0.00000000 0.00000000 1.02143353 0.9969553792 996.95537925
B5 $532,018.07 997.97681684 0.00005639 0.00000000 0.00000000 0.00000000 1.02131869 0.9969554418 996.95544176
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




WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
Series: AMAC.0313
Distribution Date: 03/25/2004
 
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 $40,000,000.00 5.5000000000% 5.5000000000% $39,837,671.76 $182,589.33 $0.00 $0.00 $0.00 $182,589.33
A2 $28,373,000.00 5.5000000000% 5.5000000000% $28,150,208.10 $129,021.79 $0.00 $0.00 $0.00 $129,021.79
A3 $24,249,000.00 5.5000000000% 5.5000000000% $24,471,791.90 $112,162.38 $0.00 $0.00 $0.00 $112,162.38
A4 $29,323,850.00 5.5000000000% 5.5000000000% $29,323,850.00 $134,400.98 $0.00 $0.00 $0.00 $134,400.98
A5 $2,210,139.00 5.5000000000% 5.5000000000% $807,858.07 $3,702.68 $0.00 $0.00 $0.00 $3,702.68
A6 $207,487,020.00 5.5000000000% 5.5000000000% $199,796,069.40 $915,731.98 $0.00 $0.00 $0.00 $915,731.98
A7 $4,878,279.00 5.5000000000% 5.5000000000% $4,878,279.00 $22,358.78 $0.00 $0.00 $0.00 $22,358.78
A8 $5,000,000.00 5.2500000000% 5.2500000000% $4,814,664.29 $21,064.16 $0.00 $0.00 $0.00 $21,064.16
A9 $500,000.00 1.5750000000% 1.5750000000% $481,466.43 $631.92 $0.00 $0.00 $0.00 $631.92
A10 $500,000.00 6.4250000000% 6.4250000000% $481,466.43 $2,577.85 $0.00 $0.00 $0.00 $2,577.85
AP $2,193,666.68 0.0000000000% 0.0000000000% $2,188,123.31 $0.00 $0.00 $0.00 $0.00 $0.00
AX $236,623.75 5.5000000000% 5.5000000000% $196,486.05 $900.56 $0.00 $0.00 $0.00 $900.56
M $5,497,510.00 5.5000000000% 5.5000000000% $5,486,387.52 $25,145.94 $0.00 $0.00 $0.00 $25,145.94
B1 $2,128,068.00 5.5000000000% 5.5000000000% $2,123,762.52 $9,733.91 $0.00 $0.00 $0.00 $9,733.91
B2 $1,064,034.00 5.5000000000% 5.5000000000% $1,061,881.26 $4,866.96 $0.00 $0.00 $0.00 $4,866.96
B3 $709,356.00 5.5000000000% 5.5000000000% $707,920.84 $3,244.64 $0.00 $0.00 $0.00 $3,244.64
B4 $532,017.00 5.5000000000% 5.5000000000% $530,940.63 $2,433.48 $0.00 $0.00 $0.00 $2,433.48
B5 $532,018.07 5.5000000000% 5.5000000000% $530,941.70 $2,433.48 $0.00 $0.00 $0.00 $2,433.48
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
Total $354,678,057.75     $345,191,816.73 $1,573,000.82 $0.00 $0.00 $0.00 $1,573,000.82




WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
Series: AMAC.0313
Distribution Date: 03/25/2004
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 $40,000,000.00 5.5000000000% 5.5000000000% 995.94179400 4.56473325 0.00000000 0.00000000 0.00000000 4.56473325
A2 $28,373,000.00 5.5000000000% 5.5000000000% 992.14774962 4.54734395 0.00000000 0.00000000 0.00000000 4.54734395
A3 $24,249,000.00 5.5000000000% 5.5000000000% 1,009.18767372 4.62544352 0.00000000 0.00000000 0.00000000 4.62544352
A4 $29,323,850.00 5.5000000000% 5.5000000000% 1,000.00000000 4.58333336 0.00000000 0.00000000 0.00000000 4.58333336
A5 $2,210,139.00 5.5000000000% 5.5000000000% 365.52364806 1.67531544 0.00000000 0.00000000 0.00000000 1.67531544
A6 $207,487,020.00 5.5000000000% 5.5000000000% 962.93285913 4.41344225 0.00000000 0.00000000 0.00000000 4.41344225
A7 $4,878,279.00 5.5000000000% 5.5000000000% 1,000.00000000 4.58333359 0.00000000 0.00000000 0.00000000 4.58333359
A8 $5,000,000.00 5.2500000000% 5.2500000000% 962.93285800 4.21283200 0.00000000 0.00000000 0.00000000 4.21283200
A9 $500,000.00 1.5750000000% 1.5750000000% 962.93286000 1.26384000 0.00000000 0.00000000 0.00000000 1.26384000
A10 $500,000.00 6.4250000000% 6.4250000000% 962.93286000 5.15570000 0.00000000 0.00000000 0.00000000 5.15570000
AP $2,193,666.68 0.0000000000% 0.0000000000% 997.47301172 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000
AX $236,623.75 5.5000000000% 5.5000000000% 830.37332474 3.80587325 0.00000000 0.00000000 0.00000000 3.80587325
M $5,497,510.00 5.5000000000% 5.5000000000% 997.97681496 4.57405989 0.00000000 0.00000000 0.00000000 4.57405989
B1 $2,128,068.00 5.5000000000% 5.5000000000% 997.97681277 4.57405966 0.00000000 0.00000000 0.00000000 4.57405966
B2 $1,064,034.00 5.5000000000% 5.5000000000% 997.97681277 4.57406436 0.00000000 0.00000000 0.00000000 4.57406436
B3 $709,356.00 5.5000000000% 5.5000000000% 997.97681277 4.57406436 0.00000000 0.00000000 0.00000000 4.57406436
B4 $532,017.00 5.5000000000% 5.5000000000% 997.97681277 4.57406436 0.00000000 0.00000000 0.00000000 4.57406436
B5 $532,018.07 5.5000000000% 5.5000000000% 997.97681684 4.57405516 0.00000000 0.00000000 0.00000000 4.57405516
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




WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
MASTER SERVICING
MORTGAGE PASS-THROUGH CERTIFICATES
03/2004 DISTRIBUTION REPORT
SERIES: AMAC 0313
WEIGHTED AVERAGE PC RATE: 5.46827%
WEIGHTED AVERAGE MATURITY: 355.09051
WEIGHTED AVERAGE LOAN AGE: 4.16380
POOL NUMBER: 2302
ISSUE DATE: 12/23/2003
CERTIFICATE BALANCE AT ISSUE: $354,678,057.76
  TOTAL NUMBER
OF MORTAGES
CERTIFICATE ACCOUNT
ACTIVITY (@ PCRATE)
CERTIFICATE BALANCE
OUTSTANDING
BALANCES FROM LAST FISCAL MONTH-END: 700   $345,191,816.76
PRINCIPAL POOL COLLECTION(S):      
Scheduled Principal Collection Due Current Month   $353,531.92  
Unscheduled Principal Collection/Reversals   $55,372.41  
Liquidations-in-full 23 $11,247,345.40  
Subsequent Recoveries   $0.00  
Net principal Distributed   $11,656,249.73 -$11,656,249.73
 
CAPITAL LOSS (PRINCIPAL WRITTEN OFF):     $0.00
 
BALANCE CURRENT FISCAL MONTH-END: 677   $333,535,567.03
 
SCHEDULED INTEREST AT MORTGAGE RATE:   $1,720,603.06  
 
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
03/2004 DISTRIBUTION REPORT
  TOTAL NUMBER
OF MORTAGES
CERTIFICATE ACCOUNT
ACTIVITY (@ PCRATE)
CERTIFICATE BALANCE
OUTSTANDING
SCHEDULED SERVICING FEE EXPENSES:   $147,602.30  
 
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:   $13,229,250.49  




WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
MASTER SERVICING
MORTGAGE PASS-THROUGH CERTIFICATES
03/2004 DISTRIBUTION REPORT
SERIES: AMAC 0313
WEIGHTED AVERAGE PC RATE: 5.46827%
WEIGHTED AVERAGE MATURITY: 355.09051
WEIGHTED AVERAGE LOAN AGE: 4.16380
POOL NUMBER: ALL
ISSUE DATE: 12/23/2003
CERTIFICATE BALANCE AT ISSUE: $354,678,057.76
  TOTAL NUMBER
OF MORTAGES
CERTIFICATE ACCOUNT
ACTIVITY (@ PCRATE)
CERTIFICATE BALANCE
OUTSTANDING
BALANCES FROM LAST FISCAL MONTH-END: 700   $345,191,816.76
PRINCIPAL POOL COLLECTION(S):      
Scheduled Principal Collection Due Current Month   $353,531.92  
Unscheduled Principal Collection/Reversals   $55,372.41  
Liquidations-in-full 23 $11,247,345.40  
Subsequent Recoveries   $0.00  
Net principal Distributed   $11,656,249.73 -$11,656,249.73
 
CAPITAL LOSS (PRINCIPAL WRITTEN OFF):     $0.00
 
BALANCE CURRENT FISCAL MONTH-END: 677   $333,535,567.03
 
SCHEDULED INTEREST AT MORTGAGE RATE:   $1,720,603.06  
 
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
03/2004 DISTRIBUTION REPORT
  TOTAL NUMBER
OF MORTAGES
CERTIFICATE ACCOUNT
ACTIVITY (@ PCRATE)
CERTIFICATE BALANCE
OUTSTANDING
SCHEDULED SERVICING FEE EXPENSES:   $147,602.30  
 
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:   $13,229,250.49  




WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
Series: AMAC.0313
Distribution Date: 03/25/2004
 
Distribution by Group
Pool ID Principal Interest Total  
Pool - 2302 $11,656,249.73 $1,573,000.76 $13,229,250.49  
Aggregate $11,656,249.73 $1,573,000.76 $13,229,250.49  
 
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 - 2302 $345,191,816.76 700 23 677 $333,535,567.03 $353,531.92 $11,247,345.40 $55,372.41 $11,656,249.73
Aggregate $345,191,816.76 700 23 677 $333,535,567.03 $353,531.92 $11,247,345.40 $55,372.41 $11,656,249.73
 
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 - 2302 26 $13,047,065.36 2 $1,248,100.73 0 $0.00 0 $0.00  
Aggregate 26 $13,047,065.36 2 $1,248,100.73 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 - 2302 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(2302) 0 $0.00  
Aggregate 0 $0.00  




WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
Series: AMAC.0313
Distribution Date: 03/25/2004
 
INSURANCE RESERVES - Group 1(2302)
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 $2,057,133.00 $0.00 $0.00 $0.00 $2,057,133.00
Bankruptcy Bond
Single-Units $50,000.00 $0.00 $0.00 $0.00 $50,000.00
Multi-Units $0.00 $0.00 $0.00 $0.00 $0.00
Mortgage Repurchase $3,546,780.00 $0.00 $0.00 $0.00 $3,546,780.00
 
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 $2,057,133.00 $0.00 $0.00 $0.00 $2,057,133.00
Bankruptcy Bond
Single-Units $50,000.00 $0.00 $0.00 $0.00 $50,000.00
Multi-Units $0.00 $0.00 $0.00 $0.00 $0.00
Mortgage Repurchase $3,546,780.00 $0.00 $0.00 $0.00 $3,546,780.00




WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
Series: AMAC.0313
Distribution Date: 03/25/2004
 
The 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 December 23,2003 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 200403 are as follows:
Class Class Principal Balance
M $5,480,772.17
B1 $2,121,588.84
B2 $1,060,794.42
B3 $707,196.28
B4 $530,397.21
B5 $530,398.31
Total $10,431,147.22
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 $2,057,133.00, $50,000.00, $3,546,780.00 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."