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Trim Air provided by which systems
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Trim Air Switch controls
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MD-11 Air Systems
| Question | Answer |
|---|---|
| Trim Air provided by which systems | Systems 1 and 3 |
| Trim Air Switch controls | Both Trim Air Pressure Regulating Valves (PRV) |
| Temp Control Knobs control | Trim Air Modulating Valves |
| Trim Air Manifold is routed through | Avionics Bay |
| External air can be connected to | Systems 1 & 2 (Left Side) |
| Conditioned air can be connected to | Right side of AC |
| Avionics Cooling begins when | AC Power Application |
| Number of cooling fans in Avionics and CAC | 3 each (only one runs at a time) |
| On T/O the Avionics Exhaust Fan is ___ and the Venturi is _____ | Exhaust Fan ON, Venturi CLOSED for TO |
| After T/O the Avionics Exhaust Fan is ____ and the Venturi is ____ | Exhaust Fan OFF, Venturi OPEN @ 1.5 PSI differential |
| "FLOW" light in AVNCS FAN switch on means (CPA) | Cooling airflow insufficient, Pressurization airflow insufficient, Altitude (cabin) >10,000' |
| "OVRD" light in AVNCS FAN switch always means | Exhaust Fan is ON, Venturi is CLOSED (comes on for normal takeoff) |
| Air System Test is initiated by | Annunciator Lights Test |
| Air System Test test the following (TEMAC) | Trim air shut-off Engine 2 anti-ice duct Manifold fail detect syst Avionics Fan CAC fans |
| "CAB ALT" light means | >10,000' CA in AUTO or MAN and turns off ECON |
| "NO MASKS" light means | Masks in lav didn't drop by 14,770' Hold switch 3 sec to drop masks |
| Does the Trim Air switch work in auto or manual mode | Both |
| "AVNCS OVHT" light in Trim Air Switch means and does what | Assumes leak in trim air manifold Closes both Trim Air PRVs in AUTO or MANUAL |
| CABIN AIR switch when pressed does what | 1. Reduces to single pack operation 2. Closes Cargo Zone Cond. Air S/O Valve (in MAN, requires QRH to accomplish) |
| Pack "FLOW" light illuminated means | Pack commanded on & low airflow Pack commanded off & flow present |
| 1-2 or 1-3 ISOL switch "DISAG" light means | Valve not in commanded position |
| Limitation on use of 1-2/1-3 ISOL switch | Do not interconnect two or more active engine pneumatic supply systems |
| "USE ENG AIR" light switch on means | A/C is pressurized in flight and APU AIR is selected ON |
| "PRESS" light in PRV switch means | Low Pressure |
| "TEMP HI" light in PRV switch means | Hot air downstream of pre-cooler |
| "TEMP HI" in AUTO results in | Level 1 Alert (amber) PRV closes ISO valves used to run pack |
| "TEMP HI" in MANUAL results in | Red Level 3 Alert No Auto features. Manually close PRV IAW QRH |
| "MANF" light means | Hot air outside the manifold |
| "MANF" light in AUTO results in | CAC MANF DECAY CK (level 1) PRV Closes |
| "MANF" light in MAN results in | CAC MANF FAIL (level 3) PRV Closes Requires crew to perform decay check |
| # 1 "MANF" light alone, leak is _____ | Between #1 Engine pod and CAC |
| #1 & 2 "MANF" lights, leak is _____ | Left FWD tunnel, FWD of CAC |
| #2 "MANF" light alone, leak is ___ | Aft of CAC up to #2 engine |
| #3 "MANF" light alone, leak is ___ | Right engine to fuselage, up FWD right tunnel to pack |
| All 3 "MANF" lights, leak is ___ | Inside the CAC |
| All 3 "MANF" lights on, Controller does the following | Performs decay check to isolate problem Turns good systems back on Red "MANF" lights on until sys cools |
| Lower FWD Cargo compartment | Heated, vented, and cooled from SYS 3 |
| Center Cargo compartment | Heated only from SYS 2 |
| Aft Cargo compartment | Heated, vented, cooled from SYS 2 |
| Max Differential Pressure | 9.1 PSI |
| Normal Differential Pressure | 8.6 PSI |
| Max Operating Altitude | 43,200' |
| Pressure Reliev Valves begin to open at __ fully open at __ | 8.76 PSI 9.1 PSI |
| Max Differential Pressure on the ground | .5 PSI |
| Door will not open if pressure reaches | .55 PSI |
| AC Pressurized to ___ when ___ | 100' Below Field Elevation Slats Extended (cleared to configure) |
| Bleeds and Packs come back on during normal takeoff profile at | First Power Reduction |
| If Packs did not come on at first pwr red, then will come on at | 4500' AFE |
| Normal pressurization schedule begins at ___ for emergency return purposes | 5000' AFE |
| Aircraft depressurizes on landing when | Slats Retracted |
| Ditching Switch does these three things | Closes holes, depressurizes, inhibits GPWS and some landing gear warnings |
| Pressurizaition numbers in sequence | <100', 0.5, 0.55, Pwr Red, 4500', 5000', 8.6, 8.76, 9.1, 43,200' |
| "NO ICE DETECTED" light inhibited below | 18,000' |
| "ICE DET SINGLE" means | One lost system, pilot must determine when to turn on AI |
| EAI uses ___ stage air | MID |
| Wing Anti Ice heats | The outer 5 slats |
| Rule of 4s | One bleed source may only support 4 points (Pack=2, AI=1) |
| If you lose 2 bleed sources, one source may power __ points while ___ | 5 Points, while departing icing conditions |
| Eng 2 Anti Ice Duct DUAL shroud leak produces | Level 1 alert, ENG 2 A-ICE DUCT, Ok to use |
| Eng 2 Anti Ice Duct SINGLE shroud leak produces | Level 1 alert SEL ENG 2 AI OFF |
| If SINGLE shroud w/leak and valve does not close then | Level 3 Alert: ENG 2 A-ICE DUCT Phase ONE required: THROTTLE IDLE |
Created by:
cakorps