T-6B Environmental Control System (ECS) Created:5 Sep 2015 Updated:18 Sep 2015 T6BDriver.com

Objectives Identify components and understand operation of heating/defog/ventilation/air conditioning systems Understand Environmental Control Panel switches and operation Identify operations limits of heating/defog/ventilation/air conditioning systems Identify canopy components and understand normal and emergency operations Identify anti-G components and understand normal operations of system (Utilize ECS system schematic while reviewing this slideshow)

References T-6B NATOPS Manual Section 1 Environmental Control System Bleed Air Supply System Canopy Seal and Anti-G System Heating and Defogging System Pressurization System Cockpit and Avionics Cooling System Fresh Air Ventilation Canopy Canopy Operation Procedures Canopy Fracturing System (CFS) Emergency Ground Egress System Section 5 Figure 5-1 Instrument Markings Miscellaneous Limitations Equipment Cooling Limitations Cockpit Pressurization System Limitations Canopy Wind Limitations

Provides automatic temperature and pressurization control Utilizes engine bleed air from right side for heating, defog, pressurization, anti- G, and canopy seal Cockpit cooling provided by a separate vapor-cycle system (air conditioning) Fresh air ventilation available for non-pressurized flight Environmental Control Panel in front cockpit only ECS System Overview Rt Side P3 Port Inflow Valve (Bi-Level Flow Control & Shutoff Valve) 300 F DUCT TEMP Heat Exchanger CKPT PX (Delta P: ) Defog Valve (Bi-Level Flow Control & Bypass Valve) Canopy Seal/Anti-G Electric Shutoff Valve DEFOG OFF DEFOG (ON): -Opens BLFC & BPV -Opens BLFC & SOV to “HI” -Turns on Air Conditioner -Up to 40 sec to close HI NORM OFF BLEED AIR INFLOW Bleed Air Inflow: HI: Full open NORM: Half-way open OFF: Closed Cowl Vent Blower WOW Fresh Air Valve HI NORM OFF RAM AIR FLOW Heat Exchanger Bypass Valve HOT COLD AUTO MANUAL F 8,000’) Firewall Shutoff Valve Defog Butterfly Valve Foot Warmer CANOPY FOOT Heating Sys Ejector (Increases defog volume) Canopy Seal Valve G-Suit Water Separator 7 psi Safety Valve Temp Sensor Cockpit Temp Control Sensor Cabin Temp Sensor Dump Solenoid Control Valve Regulator Control Valve Safety Outflow Valve Delta-P Regulator NORM DUMP PRESSURIZATION RAM/ DUMP Pressurization: RAM/DUMP: Opens Control Valve & Fresh Air Valve / Dumps press DUMP: Dumps press NORM: Follows normal press sched WOW (Delta-P: 3.6 +/-0.2) Evap Blwr CKPT ALT (Cabin: 19,000’) Acft Alt Cabin Alt 31,000’ 16,600’ 18,069’ 8,000’ (3.6 +/-0.2 ΔP) 8,000’ (Pressurization Begins) Defog

Rt Side P3 Port Inflow Valve (Bi-Level Flow Control & Shutoff Valve) Defog Valve (Bi-Level Flow Control & Bypass Valve) Canopy Seal/Anti-G Electric Shutoff Valve DEFOG OFF DEFOG (ON): -Opens BLFC & BPV -Opens BLFC & SOV to “HI” -Turns on Air Conditioner -Up to 40 sec to close HI NORM OFF BLEED AIR INFLOW Bleed Air Inflow: HI: Full open NORM: Half-way open OFF: Closed Bleed air tapped off of compressor section on right side (P3 port) for: Defogging Heating Pressurization Anti-G Canopy Seal 3 Main valves in system: Inflow Valve Also called Bi-level Flow Control and Shutoff Valve Controlled by BLEED AIR INFLOW switch on Environmental Control Panel (front cockpit) Allows bleed air from P3 port for ECS operations With Air Conditioner switch ON and aircraft below 7500 feet (pressurization not required) the Inflow Valve is auto closed (regardless of Bleed Air Switch) to improve cooling Defog Valve Also called Bi-level Flow Control and Bypass Valve Controlled by DEFOG switch (front cockpit) Increases volume of bleed air to assist with defogging canopy Canopy Seal/Anti-G Electrical Shutoff Valve Controlled by BLEED AIR INFLOW switch on Environmental Control Panel (front cockpit) Allows bleed air to anti-G system and canopy pressure seal Bleed Air Supply (Rt Side P3 Port) Rt Side P3 Air Rt Side Gas Generation Section Fwd Eng Air Intake Inflow Valve Defog Valve Canopy/Anti-G Valve Bleed Air Inflow Switch Defog Switch Rt Side P3 Tap

Rt Side P3 Port Inflow Valve (Bi-Level Flow Control & Shutoff Valve) Defog Valve (Bi-Level Flow Control & Bypass Valve) Canopy Seal/Anti-G Electric Shutoff Valve DEFOG OFF DEFOG (ON): -Opens BLFC & BPV -Opens BLFC & SOV to “HI” -Turns on Air Conditioner -Up to 40 sec to close HI NORM OFF BLEED AIR INFLOW Bleed Air Inflow: HI: Full open NORM: Half-way open OFF: Closed Bleed Air Inflow Switch On Environmental Control Panel (front cockpit only) Opens Inflow Valve to allow bleed air for ECS operations Opens Canopy/Anti-G Valve to allow bleed air to anti-G system and canopy seal 3 position switch: OFF – Inflow Valve closed NORM – Inflow Valve half-way open HI – Inflow Valve full open Defog Switch Switch in front cockpit only (center console) Placing switch to ON: Opens Defog Valve (increases volume of bleed air to assist with defogging canopy) Commands Inflow Valve to full open (regardless of BLEED AIR INFLOW switch position) Turns on air conditioner (regardless of AIR COND switch position) Reduces climb performance by 47% Can take up to 40 seconds for valves to close after selecting OFF Increases ITT for a given PCL setting due to higher bleed air load on engine Bleed Air Supply (Rt Side P3 Port) Rt Side P3 Air Rt Side Gas Generation Section Fwd Eng Air Intake Inflow Valve Defog Valve Canopy/Anti-G Valve Bleed Air Inflow Switch Defog Switch

Rt Side P3 Port Inflow Valve (Bi-Level Flow Control & Shutoff Valve) Defog Valve (Bi-Level Flow Control & Bypass Valve) Canopy Seal/Anti-G Electric Shutoff Valve DEFOG OFF DEFOG (ON): -Opens BLFC & BPV -Opens BLFC & SOV to “HI” -Turns on Air Conditioner -Up to 40 sec to close HI NORM OFF BLEED AIR INFLOW Bleed Air Inflow: HI: Full open NORM: Half-way open OFF: Closed Power Source Inflow Sys CB controls power to system Inflow Valve, Defog Valve, and Canopy/Anti-G Valve are ALL powered through one CB Canopy/Anti-G fail safes to close if power is lost Bleed Air Supply (Rt Side P3 Port) Rt Side P3 Air Rt Side Gas Generation Section Fwd Eng Air Intake Inflow Valve Defog Valve Canopy/Anti-G Valve Inflow Sys CB

Rt Side P3 Port Inflow Valve (Bi-Level Flow Control & Shutoff Valve) Heat Exchanger Defog Valve (Bi-Level Flow Control & Bypass Valve) Canopy Seal/Anti-G Electric Shutoff Valve DEFOG OFF DEFOG (ON): -Opens BLFC & BPV -Opens BLFC & SOV to “HI” -Turns on Air Conditioner -Up to 40 sec to close HI NORM OFF BLEED AIR INFLOW Bleed Air Inflow: HI: Full open NORM: Half-way open OFF: Closed Cowl Vent Blower WOW Heat Exchanger Temp Sensor 300 F DUCT TEMP Cooling Air Inlet Defog Line Anti-G/Canopy Seal Line Blower Inflow Line

Rt Side P3 Port Inflow Valve (Bi-Level Flow Control & Shutoff Valve) Heat Exchanger Defog Valve (Bi-Level Flow Control & Bypass Valve) Canopy Seal/Anti-G Electric Shutoff Valve DEFOG OFF DEFOG (ON): -Opens BLFC & BPV -Opens BLFC & SOV to “HI” -Turns on Air Conditioner -Up to 40 sec to close HI NORM OFF BLEED AIR INFLOW Bleed Air Inflow: HI: Full open NORM: Half-way open OFF: Closed Cowl Vent Blower WOW Fresh Air Valve HI NORM OFF RAM AIR FLOW 8,000’) Used for fresh air ventilation during unpressurized flight Air from cooling air inlet duct directed through Fresh Air Valve into cockpit Position of Fresh Air Valve (during ground ops & unpressurized flight) is controlled by RAM AIR INFLOW switch on Environmental Control Panel 3 Position switch: OFF – Fresh Air Valve closed NORM – Fresh Air Valve half-way open HI – Fresh Air Valve full open Closes at approx. 8000’ PA as cockpit begins to pressurize (regardless of switch position) Fresh Air Valve Ram Air Flow Switch Temp Sensor 300 F DUCT TEMP

Rt Side P3 Port Inflow Valve (Bi-Level Flow Control & Shutoff Valve) Heat Exchanger Defog Valve (Bi-Level Flow Control & Bypass Valve) Canopy Seal/Anti-G Electric Shutoff Valve DEFOG OFF DEFOG (ON): -Opens BLFC & BPV -Opens BLFC & SOV to “HI” -Turns on Air Conditioner -Up to 40 sec to close HI NORM OFF BLEED AIR INFLOW Bleed Air Inflow: HI: Full open NORM: Half-way open OFF: Closed Cowl Vent Blower WOW Fresh Air Valve HI NORM OFF RAM AIR FLOW 8,000’) Valve controlled by Temperature Controller (automatic or manual) Mixes hot bleed air, downstream of heat exchanger to maintain selected temperature Temperature Controller Front cockpit only In AUTO: Maintains cockpit temp between 60 and 90°F (Auto) 2 sensors in cockpit to relay temperature to Temp Controller (Auto) Valve closes if Temp Controller detects 165°F at cockpit temperature control sensor (tries to prevent duct over-temp) In MANUAL: Direct control of valve Spring loaded to middle position Hold toward COLD closes valve/hold toward HOT opens valve Heat Exchanger Bypass Valve HOT COLD AUTO MANUAL F Heat Exchanger Bypass Valve Cockpit Temp Control Sensor Cabin Temp Sensor Temp Sensor 300 F DUCT TEMP Heat Exchanger Defog Line Anti-G/Canopy Seal Line Blower Inflow LineHeat Exchanger Bypass Valve Temperature Controller

Rt Side P3 Port Inflow Valve (Bi-Level Flow Control & Shutoff Valve) Heat Exchanger Defog Valve (Bi-Level Flow Control & Bypass Valve) Canopy Seal/Anti-G Electric Shutoff Valve DEFOG OFF DEFOG (ON): -Opens BLFC & BPV -Opens BLFC & SOV to “HI” -Turns on Air Conditioner -Up to 40 sec to close HI NORM OFF BLEED AIR INFLOW Bleed Air Inflow: HI: Full open NORM: Half-way open OFF: Closed Cowl Vent Blower WOW Fresh Air Valve HI NORM OFF RAM AIR FLOW 8,000’) Firewall Shutoff Valve Controlled by Firewall Shutoff Handle (front cockpit only) Handle lifts vertically and has clip to hold down in place Used during emergency to cut off bleed air from going aft of firewall Valve in right side maintenance access bay (next to Hydraulic Shutoff Valve) Heating System Ejector Bleed air passes through a venturi Drop in static pressure draws ambient cockpit air into ECS ducting Increases volume of air to defog Bleed Air Supply to Cockpit HOT COLD AUTO MANUAL F Heat Exchanger Bypass Valve Cockpit Temp Control Sensor Cabin Temp Sensor Temp Sensor 300 F DUCT TEMP Firewall Shutoff Valve Heating Sys Ejector (Increases defog volume) Firewall Shutoff Handle Cable ECS Duct Firewall Shutoff Valve Firewall Shutoff Handle (Front Cockpit)

Rt Side P3 Port Inflow Valve (Bi-Level Flow Control & Shutoff Valve) 300 F DUCT TEMP Heat Exchanger Defog Valve (Bi-Level Flow Control & Bypass Valve) Canopy Seal/Anti-G Electric Shutoff Valve DEFOG OFF DEFOG (ON): -Opens BLFC & BPV -Opens BLFC & SOV to “HI” -Turns on Air Conditioner -Up to 40 sec to close HI NORM OFF BLEED AIR INFLOW Bleed Air Inflow: HI: Full open NORM: Half-way open OFF: Closed Cowl Vent Blower WOW Fresh Air Valve HI NORM OFF RAM AIR FLOW Heat Exchanger Bypass Valve HOT COLD AUTO MANUAL F 8,000’) Firewall Shutoff Valve Defog Butterfly Valve Foot Warmer CANOPY FOOT Heating Sys Ejector (Increases defog volume) Temp Sensor Cockpit Temp Control Sensor Cabin Temp Sensor WOW Control lever in front cockpit only (center console) Mechanically positions a butterfly valve in ducts (both cockpits) to direct air to selected location Placarded as AIR with positions of CANOPY & FOOT CANOPY – Directs air to windshield defog (front) and canopy defog outlets (both cockpits) **Defog air is provided to canopy from mid-lever position and above FOOT – Directs air to footwarmer outlets (both cockpits) Vent Control Lever Defog Vent Control Lever

Rt Side P3 Port Inflow Valve (Bi-Level Flow Control & Shutoff Valve) 300 F DUCT TEMP Heat Exchanger Defog Valve (Bi-Level Flow Control & Bypass Valve) Canopy Seal/Anti-G Electric Shutoff Valve DEFOG OFF DEFOG (ON): -Opens BLFC & BPV -Opens BLFC & SOV to “HI” -Turns on Air Conditioner -Up to 40 sec to close HI NORM OFF BLEED AIR INFLOW Bleed Air Inflow: HI: Full open NORM: Half-way open OFF: Closed Cowl Vent Blower WOW Fresh Air Valve HI NORM OFF RAM AIR FLOW Heat Exchanger Bypass Valve HOT COLD AUTO MANUAL F 8,000’) Firewall Shutoff Valve Defog Butterfly Valve Foot Warmer CANOPY FOOT Heating Sys Ejector (Increases defog volume) Canopy Seal Valve G-Suit Water Separator 7 psi Safety Valve Temp Sensor Cockpit Temp Control Sensor Cabin Temp Sensor Canopy Seal/Anti-G Valve controlled by BLEED AIR INFLOW switch on Environmental Control Panel Allows bleed air to anti-G system and canopy pressure seal Valve fails to closed position if power lost through Inflow Sys CB on Battery CB Panel Air passes through heat exchanger then water separator removes moisture from air Safety Valve provides pressure relief if pressure exceeds 7 psi Air flows to Canopy Seal Valve & anti-G Suit connectors in both cockpits Canopy pressure seal inflates once weight is off wheels Canopy Seal/Anti-G Systems Defog Rt Side Gas Generation Section Fwd Canopy/Anti-G Valve Bleed Air Inflow Switch Canopy/Anti-G Line

Side opening – oil filled strut to assist with opening Bird strike capable (4 pound bird up to 270 kts) – windscreen & front transparency Components: Canopy frame Windscreen Front transparency Rear transparency Weather seal Pressure seal Canopy Canopy Weather Seal (Pressure Seal not visible) WindscreenFront Transparency Rear Transparency Canopy Frame

Canopy HookGuide Pin 5 Over-Centering Hooks & Guide Pins Canopy Rail Mechanical Lock Indicator

External Canopy Handle Must push Unlock Button to move out of CLOSE position One handle located by front cockpit only Internal Canopy Open & Lift Handle Both cockpits Rotate forward to latch canopy Lift Lock Release Lever to rotate handle aft to unlatch canopy Canopy Lock Release Handle On outboard, right side of both cockpits Pulled to release over-center lock and allow canopy to close Canopy External Canopy Handle Internal Canopy Open & Lift Handle Canopy Lock Release Handle Lock Release Lever

Canopy Operation Closing from Inside (not full procedure) **Always ensure canopy rail is cleared and CFS Pin Storage Box is closed prior to canopy movement** To close canopy from inside: Pull canopy lock release handle (right side) Grab canopy frame (left hand) & pull canopy past the center position then release canopy lock release handle Pull canopy (left hand on canopy frame & then use elbow) down to canopy sill (ensure internal handle is full aft) Rotate internal handle forward slowly until resistance is felt then reverse direction until pressure is relieved then continue to rotate handle forward to LATCHED position Once closed Momentarily lift lock release lever (check canopy warning illuminate and handle does not rotate aft) Gently rotate handle aft to feel canopy lock Verify mechanical green indicators are visible To open canopy from inside: Raise and hold lock release lever (aft of internal handle) with right hand Rotate canopy handle aft to UNLOCK position with left hand Use canopy handle (left hand) and a hand on top of canopy (right hand) to open canopy

Canopy Canopy Fracturing System (CFS) 2 modes of operation Automatic – activates during ejection sequence (via CFS attach bolt assembly) Manual – Internal CFS handle in each cockpit/External CFS handle on each side of aircraft Internal CFS Handle Located in each cockpit behind PCL Rotate 90° then pull up to activate CFS Handle activates respective transparency External CFS Handle On both sides of aircraft near wing trailing edge Pull handle out on a 10 foot lanyard to activate Activates the fracturing system for both transparencies Explosives Front transparency Uses flexible linear shaped charge (FLSC) Thicker transparency Cracks into two pieces Rear transparency Uses mild detonating cord (MDC) Thinner transparency Only centerline diamond pattern detonates on ejection Handle detonates both periphery and diamond pattern Internal CFS Handle (Front Cockpit) External CFS Handle FLSC MDC

Canopy Canopy Fracturing System (CFS) Operation Pulling a CFS handle activates piezoelectric crystals (no electricity required) Piezoelectric crystals produce electric charge to fire flash lamps Flash lamps excite a laser rod that sends energy to front/rear cockpit optical detonators (also called donor assembly) Optical detonators fires a plunger into CFS acceptor assembly (on canopy) Acceptor assembly fires mild detonating cords that lead to activation of the FSLS or MDC Optical Detonators (Donor Assembly) Plungers Acceptor Assemblies Front Cockpit Rear Cockpit Lead Detonating Cord CFS Attach Bolt & Assembly (for Ejection)

Canopy (Limitations) Do not open canopy on ground when surface winds exceed 40 kts When aircraft parked in direct sunlight in temperatures of 35°C (95°F) and above: Storage TimeCanopy/Sun ShieldsRequirement >15 minClosed/Not InstalledOpen canopy fully for 1 hr prior to engine start No limitOn prop strut/Not InstalledOpen canopy fully for 15 min prior to engine start No limitFully open/Not InstalledNo limit >15 minClosed/InstalledOpen canopy fully for 15 min prior to engine start No limitOn prop strut/InstalledNo limit ****** * Most common scenarios

G-suit hose connector in each cockpit aft, left side of panel Hose mechanically connected to system Quick disconnect coupling (for egress) Test Button Aft of G-suit connection Pushing down depresses weighted rod in system and allows bleed air to the suit Anti-G G-suit Hose G-suit Connection (Front Cockpit) G-suit Test Button

Rt Side P3 Port Inflow Valve (Bi-Level Flow Control & Shutoff Valve) 300 F DUCT TEMP Heat Exchanger Defog Valve (Bi-Level Flow Control & Bypass Valve) Canopy Seal/Anti-G Electric Shutoff Valve DEFOG OFF DEFOG (ON): -Opens BLFC & BPV -Opens BLFC & SOV to “HI” -Turns on Air Conditioner -Up to 40 sec to close HI NORM OFF BLEED AIR INFLOW Bleed Air Inflow: HI: Full open NORM: Half-way open OFF: Closed Cowl Vent Blower WOW Fresh Air Valve HI NORM OFF RAM AIR FLOW Heat Exchanger Bypass Valve HOT COLD AUTO MANUAL F 8,000’) Firewall Shutoff Valve Defog Butterfly Valve Foot Warmer CANOPY FOOT Heating Sys Ejector (Increases defog volume) Canopy Seal Valve G-Suit Water Separator 7 psi Safety Valve Temp Sensor Cockpit Temp Control Sensor Cabin Temp Sensor Evap Blwr Engine-driven, vapor-cycle system Components Evaporator Modules Utilizes Evap-Blower fan to pull cockpit air across cooling coils Cooling coils exchange latent heat in the air (changes liquid refrigerant to vapor) Discharges air through one eye-ball-type outlet and 2 outlets on the glare shield AC Compressor Belt driven from prop shaft Moves refrigerant (vapor) to the Condenser/Blower Condenser/Blower Returns vapor to a high pressure liquid Blower expels heat out 2 exhaust vents on bottom of aircraft Air Conditioning Defog Air Conditioning Discharge Blower Exhaust Air Conditioning System Blower Intake Compressor

Rt Side P3 Port Inflow Valve (Bi-Level Flow Control & Shutoff Valve) 300 F DUCT TEMP Heat Exchanger Defog Valve (Bi-Level Flow Control & Bypass Valve) Canopy Seal/Anti-G Electric Shutoff Valve DEFOG OFF DEFOG (ON): -Opens BLFC & BPV -Opens BLFC & SOV to “HI” -Turns on Air Conditioner -Up to 40 sec to close HI NORM OFF BLEED AIR INFLOW Bleed Air Inflow: HI: Full open NORM: Half-way open OFF: Closed Cowl Vent Blower WOW Fresh Air Valve HI NORM OFF RAM AIR FLOW Heat Exchanger Bypass Valve HOT COLD AUTO MANUAL F 8,000’) Firewall Shutoff Valve Defog Butterfly Valve Foot Warmer CANOPY FOOT Heating Sys Ejector (Increases defog volume) Canopy Seal Valve G-Suit Water Separator 7 psi Safety Valve Temp Sensor Cockpit Temp Control Sensor Cabin Temp Sensor Evap Blwr Controls Environmental Control Panel (front cockpit) Rear cockpit only has EVAP BLWR rheostat AIR COND switch turns air conditioning system ON or OFF (engages compressor) EVAP BLWR rheostat controls the fan and volume of air blowing out air conditioning ports Operation Cockpit cooling air available: Engine running Generator is on line Generator bus is powered Either AIR COND or DEFOG switch is ON Bi-level pressure switch interrupts power to compressor if high or low system pressure (auto resets) Evaporator blowers are on anytime AVIONICS MASTER switch is ON Air Conditioning Defog Bleed Air Inflow Switch Evaporator Blower Switch

Rt Side P3 Port Inflow Valve (Bi-Level Flow Control & Shutoff Valve) 300 F DUCT TEMP Heat Exchanger Defog Valve (Bi-Level Flow Control & Bypass Valve) Canopy Seal/Anti-G Electric Shutoff Valve DEFOG OFF DEFOG (ON): -Opens BLFC & BPV -Opens BLFC & SOV to “HI” -Turns on Air Conditioner -Up to 40 sec to close HI NORM OFF BLEED AIR INFLOW Bleed Air Inflow: HI: Full open NORM: Half-way open OFF: Closed Cowl Vent Blower WOW Fresh Air Valve HI NORM OFF RAM AIR FLOW Heat Exchanger Bypass Valve HOT COLD AUTO MANUAL F 8,000’) Firewall Shutoff Valve Defog Butterfly Valve Foot Warmer CANOPY FOOT Heating Sys Ejector (Increases defog volume) Canopy Seal Valve G-Suit Water Separator 7 psi Safety Valve Temp Sensor Cockpit Temp Control Sensor Cabin Temp Sensor Dump Solenoid NORM DUMP PRESSURIZATION RAM/ DUMP Pressurization: RAM/DUMP: Opens Control Valve & Fresh Air Valve / Dumps press DUMP: Dumps press NORM: Follows normal press sched Evap Blwr Requires structurally reinforced cockpit (pressure floor/firewall/aft bulkhead/canopy) Pressurization Switch On Environmental Control Panel (front cockpit only) Guarded 3-position switch (guarded to NORM) Must lift guard to select DUMP or RAM/DUMP In all switch positions, bleed air will continue to enter cockpit NORM System works automatically Normal pressurization schedule followed DUMP Removes power from dump solenoid opening control valve (pressurization is lost) RAM/DUMP Removes power from dump solenoid opening control valve (pressurization is lost) Opens fresh air valve Closes defog valve (if open) Pressurization Defog Pressurization Switch

Rt Side P3 Port Inflow Valve (Bi-Level Flow Control & Shutoff Valve) 300 F DUCT TEMP Heat Exchanger CKPT PX (Delta P: ) Defog Valve (Bi-Level Flow Control & Bypass Valve) Canopy Seal/Anti-G Electric Shutoff Valve DEFOG OFF DEFOG (ON): -Opens BLFC & BPV -Opens BLFC & SOV to “HI” -Turns on Air Conditioner -Up to 40 sec to close HI NORM OFF BLEED AIR INFLOW Bleed Air Inflow: HI: Full open NORM: Half-way open OFF: Closed Cowl Vent Blower WOW Fresh Air Valve HI NORM OFF RAM AIR FLOW Heat Exchanger Bypass Valve HOT COLD AUTO MANUAL F 8,000’) Firewall Shutoff Valve Defog Butterfly Valve Foot Warmer CANOPY FOOT Heating Sys Ejector (Increases defog volume) Canopy Seal Valve G-Suit Water Separator 7 psi Safety Valve Temp Sensor Cockpit Temp Control Sensor Cabin Temp Sensor Dump Solenoid NORM DUMP PRESSURIZATION RAM/ DUMP Pressurization: RAM/DUMP: Opens Control Valve & Fresh Air Valve / Dumps press DUMP: Dumps press NORM: Follows normal press sched Evap Blwr CKPT ALT (Cabin: 19,000’) Acft Alt Cabin Alt 31,000’ 16,600’ 18,069’ 8,000’ (3.6 +/-0.2 ΔP) 8,000’ (Pressurization Begins) Pressurization Defog Cockpit Altitude Differential Pressure

Rt Side P3 Port Inflow Valve (Bi-Level Flow Control & Shutoff Valve) 300 F DUCT TEMP Heat Exchanger CKPT PX (Delta P: ) Defog Valve (Bi-Level Flow Control & Bypass Valve) Canopy Seal/Anti-G Electric Shutoff Valve DEFOG OFF DEFOG (ON): -Opens BLFC & BPV -Opens BLFC & SOV to “HI” -Turns on Air Conditioner -Up to 40 sec to close HI NORM OFF BLEED AIR INFLOW Bleed Air Inflow: HI: Full open NORM: Half-way open OFF: Closed Cowl Vent Blower WOW Fresh Air Valve HI NORM OFF RAM AIR FLOW Heat Exchanger Bypass Valve HOT COLD AUTO MANUAL F 8,000’) Firewall Shutoff Valve Defog Butterfly Valve Foot Warmer CANOPY FOOT Heating Sys Ejector (Increases defog volume) Canopy Seal Valve G-Suit Water Separator 7 psi Safety Valve Temp Sensor Cockpit Temp Control Sensor Cabin Temp Sensor Safety Outflow Valve Delta-P Regulator NORM DUMP PRESSURIZATION RAM/ DUMP Pressurization: RAM/DUMP: Opens Control Valve & Fresh Air Valve / Dumps press DUMP: Dumps press NORM: Follows normal press sched Evap Blwr CKPT ALT (Cabin: 19,000’) Acft Alt Cabin Alt 31,000’ 16,600’ 18,069’ 8,000’ (3.6 +/-0.2 ΔP) 8,000’ (Pressurization Begins) ΔP Regulator Monitors pressure differential between cockpit and outside Sends signal to Safety Valve if ΔP exceeds 4.0 psi Safety Valve Controlled by ΔP Regulator Opens to relieve overpressure in cockpit Pressurization (System Operation) Defog Cockpit Aft Bulkhead Left Side Access Plate ΔP Regulator Safety Valve (inside duct/ not shown Dump Solenoid Looking up through right E-Bay Fwd

Rt Side P3 Port Inflow Valve (Bi-Level Flow Control & Shutoff Valve) 300 F DUCT TEMP Heat Exchanger CKPT PX (Delta P: ) Defog Valve (Bi-Level Flow Control & Bypass Valve) Canopy Seal/Anti-G Electric Shutoff Valve DEFOG OFF DEFOG (ON): -Opens BLFC & BPV -Opens BLFC & SOV to “HI” -Turns on Air Conditioner -Up to 40 sec to close HI NORM OFF BLEED AIR INFLOW Bleed Air Inflow: HI: Full open NORM: Half-way open OFF: Closed Cowl Vent Blower WOW Fresh Air Valve HI NORM OFF RAM AIR FLOW Heat Exchanger Bypass Valve HOT COLD AUTO MANUAL F 8,000’) Firewall Shutoff Valve Defog Butterfly Valve Foot Warmer CANOPY FOOT Heating Sys Ejector (Increases defog volume) Canopy Seal Valve G-Suit Water Separator 7 psi Safety Valve Temp Sensor Cockpit Temp Control Sensor Cabin Temp Sensor Dump Solenoid Control Valve Regulator Control Valve Safety Outflow Valve Delta-P Regulator NORM DUMP PRESSURIZATION RAM/ DUMP Pressurization: RAM/DUMP: Opens Control Valve & Fresh Air Valve / Dumps press DUMP: Dumps press NORM: Follows normal press sched WOW (Delta-P: 3.6 +/-0.2) Evap Blwr CKPT ALT (Cabin: 19,000’) Acft Alt Cabin Alt 31,000’ 16,600’ 18,069’ 8,000’ (3.6 +/-0.2 ΔP) 8,000’ (Pressurization Begins) Dump Solenoid Must be powered to allow Control Valve Regulator to work Anytime solenoid is de-energized, control valve will open (unpress) WOW switch de-energizes and prevents pressurizing Airborne with WOW, energized and allows pressurization at 8,000 ft Control Valve Regulator Monitors cockpit pressure Adjusts position of Pressurization Control Valve to maintain pressurization schedule Pressurization Control Valve Opens & closes as directed by Control Valve Regulator Pressurization (System Operation) Defog Pressurization Control Valve (inside duct/ not shown) Control Valve Regulator (inside duct/ not shown) Dump Solenoid Cockpit Aft Bulkhead Looking up through left E-Bay Aircraft Right Side Fwd

Rt Side P3 Port Inflow Valve (Bi-Level Flow Control & Shutoff Valve) 300 F DUCT TEMP Heat Exchanger CKPT PX (Delta P: ) Defog Valve (Bi-Level Flow Control & Bypass Valve) Canopy Seal/Anti-G Electric Shutoff Valve DEFOG OFF DEFOG (ON): -Opens BLFC & BPV -Opens BLFC & SOV to “HI” -Turns on Air Conditioner -Up to 40 sec to close HI NORM OFF BLEED AIR INFLOW Bleed Air Inflow: HI: Full open NORM: Half-way open OFF: Closed Cowl Vent Blower WOW Fresh Air Valve HI NORM OFF RAM AIR FLOW Heat Exchanger Bypass Valve HOT COLD AUTO MANUAL F 8,000’) Firewall Shutoff Valve Defog Butterfly Valve Foot Warmer CANOPY FOOT Heating Sys Ejector (Increases defog volume) Canopy Seal Valve G-Suit Water Separator 7 psi Safety Valve Temp Sensor Cockpit Temp Control Sensor Cabin Temp Sensor Dump Solenoid Control Valve Regulator Control Valve Safety Outflow Valve Delta-P Regulator NORM DUMP PRESSURIZATION RAM/ DUMP Pressurization: RAM/DUMP: Opens Control Valve & Fresh Air Valve / Dumps press DUMP: Dumps press NORM: Follows normal press sched WOW (Delta-P: 3.6 +/-0.2) Evap Blwr CKPT ALT (Cabin: 19,000’) Acft Alt Cabin Alt 31,000’ 16,600’ 18,069’ 8,000’ (3.6 +/-0.2 ΔP) 8,000’ (Pressurization Begins) Conclusion Identified components and described operation of heating/defog/ventilation/air conditioning systems Described Environmental Control Panel switches and operation Identified operations limits of heating/defog/ventilation/air conditioning systems Identified canopy components and described normal and emergency operations Identified anti-G components and described normal operations of system Abnormal ECS Scenarios located in Procedures Section/EPs Defog