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CSEE B THERMAL SWITCHES 
(3 LOCATIONS) AIR CONDITIONING PACKS WING ISOLATION VALVES (2 LOCATIONS)  ì APU SHUTOFF VALVE 
CSEE B THERMAL SWITCHES 
SEE  D 

B C
Duct Leak Detection System Test
Figure 501 (Sheet 2)

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SEE
STA 1248
STA 1480

D

Duct Leak Detection System Test
Figure 501 (Sheet 3)

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THERMAL SWITCH/EICAS MESSAGE CORRELATION 
THERMAL SWITCH EQUIPMENT NO.  (STATUS) EICAS MESSAGE 

S892  DUCT LEAK L LP A 
S893  DUCT LEAK L LP B 
S894  DUCT LEAK L LP A 
S895  DUCT LEAK L LP B 
S896  DUCT LEAK L LP A 
S897  DUCT LEAK L LP B 
S1050  DUCT LEAK L LP A 
S1051  DUCT LEAK L LP B 
S898  DUCT LEAK L LP A 
S899  DUCT LEAK L LP B 
S900  DUCT LEAK L LP A 
S901  DUCT LEAK L LP B 
S902  DUCT LEAK L LP A 
S903  DUCT LEAK L LP B 
S904  DUCT LEAK L LP A 
S905  DUCT LEAK L LP B 
S1052  DUCT LEAK L LP A 
S1464  DUCT LEAK L LP B 
S906  DUCT LEAK L LP A 
S907  DUCT LEAK L LP B 
S908  DUCT LEAK L LP A 
S909  DUCT LEAK L LP B 
S910  DUCT LEAK L LP A 
S873  DUCT LEAK R LP A 
S874  DUCT LEAK R LP B 
S875  DUCT LEAK R LP A 
S876  DUCT LEAK R LP B 
S877  DUCT LEAK R LP A 
S878  DUCT LEAK R LP B 
S1046  DUCT LEAK R LP A 
S1047  DUCT LEAK R LP B 
S879  DUCT LEAK R LP A 
S880  DUCT LEAK R LP B 
S881  DUCT LEAK R LP A 
S882  DUCT LEAK R LP B 
S883  DUCT LEAK R LP A 
S884  DUCT LEAK R LP B 
S885  DUCT LEAK R LP A 
S886  DUCT LEAK R LP B 
S1048  DUCT LEAK R LP A 
S1467  DUCT LEAK R LP B 
S887  DUCT LEAK R LP A 
S888  DUCT LEAK R LP B 
S889  DUCT LEAK R LP A 
S890  DUCT LEAK R LP B 
S891  DUCT LEAK R LP A

Thermal Switch/EICAS Message Correlation
Figure 502 (Sheet 1)

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S2236 S2237 S2234 S2235 S2232 S2233 S2238 S2239 THERMAL SWITCH EQUIPMENT NUMBER  DUCT LEAK L LP B DUCT LEAK L LP A DUCT LEAK L LP B DUCT LEAK L LP A DUCT LEAK L LP B DUCT LEAK L LP A DUCT LEAK L LP B DUCT LEAK L LP A EICAS MESSAGE (STATUS) 
S2223  DUCT LEAK R LP A 
S2222  DUCT LEAK R LP B 
S2221  DUCT LEAK R LP A 
S2220  DUCT LEAK R LP B 
S2219  DUCT LEAK R LP A 
S2218  DUCT LEAK R LP B 
S2217  DUCT LEAK R LP A 
S2216  DUCT LEAK R LP B 
S2215  DUCT LEAK R LP A 
S2214  DUCT LEAK R LP B 
S2241  DUCT LEAK R LP A 
S2240  DUCT LEAK R LP B 
S2243  DUCT LEAK C LP A 
　
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