AO2: 19:02 calint to 1 to force another HS-LS 19:07 ground hold, wt freq to 1 19:13 to MAN, to WT, pump 1 off WT reading 457 ppm - H2O highly variable (also saw this at end of last flight) - what is it?) 19:24 est. 30 min delay, disabled ch'over and closed SP 19:56 new est. ~ 1 hr., so stopped WT and turned off lamp 20:32 est. 15 min., SP and WT back to auto 20:33:30 lamp on 20:34:22 pump 1 on 20:35:36 re-enabled ch'over 20:39:26 to AUTO with Calint 1, WTfreq 1, LTfreq 1 20:51 LTfreq back to 3 20:53 WTfreq back to 4 20:56:30 noticed O2 had hit rail - upped PaO2 from 91 to 93 (signal from 10.18 to 9.5 20:59 on Air, WTfreq back to 1 HS reading 404 ppm - H2O still variable 21:01:50 taxi - controller says "caution jet wash" from 747 21:04 Calint to 50 LS reading 485 21:07:28 CO2 dropped ~ 3 ppm on WT during take-off roll 21:15:50 Calint to 1 21:22 WTint back to 4 23:50-24:00 moderate chop down low - a lot more O2 noise (need to check coil pin) 4:57:45 CO2 jumped by ~ 20 ppm on touch down MED: - Prepurge looked good, but it does not look like PaSA comes up to equilibrium pressure in 20 seconds (takes around 1 min) - could minimize bypass time (or not do bypass during prepurge) to improve 21:39 at 40 kft, Pup of 135 appears to be holding - will do 40, 28, 21, etc on descent and try to get 2 at bottom 1:16 after sampling pos 16, will wait 5 min b/c Psa jumps between boxes - Good flight