From: Lvjet Sent: Tuesday, May 19, 2015 7:23 PM To: [email protected] Subject: GIV PSI Jeffrey spoke with a Great Tech support person in Savanah,. Barry Kessler,. tomorrow I need to take photos of manifold PSI during our flight, and outflow valve position. Plus ground test readings,. Barry wants Manifold PSI readings at 65% HP / 70% HP and 75% HP for each engine, manifold values should remain constant,. Barry wants to see the integrity of manifold PSI at different phases of flight, outflow valve position etc,. -during decent, 12th stage air from engine is utilized for cabin pressurization, During climb and cruise, only 7th stage air is required., EFTA_R1_01423723 EFTA02394392