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Click to edit Master title style King Air Ground School 26 - Fire Protection.

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Presentation on theme: "Click to edit Master title style King Air Ground School 26 - Fire Protection."— Presentation transcript:

1 Click to edit Master title style King Air Ground School 26 - Fire Protection

2 Overview Engine Fire Detection, IR Detection System – Not on E90 Engine Fire Extinguishing – Halon based fire extinguishing – Not on U21 or E90 Portable Extinguisher – at least one halon in the cockpit Overheat protection for Bleed air Emergency Portable Breathing Devices

3 Engine Fire Detection: Components

4 Sensors / Detectors Infrared photocells

5 Sensors / Detectors 3 Sensors in each engine compartment Each sensor looking at a different zone in the engine compartment – 1-forward of intake – 2-upper accessory case – 3-lower accessory case Zone 1 Zone 2 Zone 3

6 Amplifier-Controller Amplifier-Controller translates sensor detection to cockpit annunciations Amplifier-Controller allows for testing the system Illustration shows the relationship between sensor/detector and amplifier-controller No fire detectedL Engine Fire Detected

7 Annunciators U21A LH/RH FIRE WARNING and FAULT WARN U21H FIRE L/R ENG and MASTER WARNING U21A U21H

8 Annunciators C12 T-handle – #1/2 FIRE PULL and MASTER WARNING 200 FIRE L/R ENG and L/R ENG FIRE-PUSH TO EXT and MASTER WARNING C12 200

9 Test Switch U21 – 8 position switch Test Switch Fire Detection C12 – 6 position switch Fire Protection Test 200 – 7 position switch Test Switch Fire Det & Fire Ext Only turn counter clockwise unless the test fails U21 C12 200

10 Electrical Circuit Breaker in Cockpit – with CB pulled, detection wont work Dual-fed bus – power must be on the aircraft in order to detect U21 C12 200

11 Engine Fire Detection: Operation

12 Test The three DET/DETR positions of the test switch – Position 1 tests the fwd intake sensor of both engines – Position 2 tests upper accessary case sensor of both engines – Position 3 tests lower accessory case sensor of both engines Position 1 Position 2 Position 3

13 Test Sensors are tested by increasing the output voltage of each sensor

14 Test U21A and U21H – Both LH/RH FIRE WARNING / FIRE L/R ENG annunciators illuminate – FAULT WARN / MASTER WARNING is triggered – Audible warning horn U21A U21H

15 Test C12 – Both T-handle #1/2 FIRE PULL annunciators illuminate – MASTER WARNING is triggered C12

16 Test 200 – Both FIRE L/R ENG annunciators illuminate – MASTER WARNING is triggered – L/R ENG FIRE PUSH TO EXT light on both sides 200

17 Fire Indication An actual fire has the same indications but will only be on the side of the fire U21H C U21A

18 Referenced Procedures Engine Fire/Failure/Severe Damage Evacuation/Engine Fire on the Ground U21 C12

19 Engine Fire Detection: Abnormalities

20 Halon

21 Toxicity Not highly toxic but does cause issues in high concentrations (>10%) Typical side effects include giddiness and tingling of extremities Same chemical family as Freon No extinguishing area

22 Aviation Uses 1301 used commonly for engine extinguishing 1211 or blend commonly used for portable fire extinguishers Engine Extinguishing Portable

23 Extinguishes Fire By: Chemically combining with atoms which are propagating the fire, preventing combustion reaction (primary) Displaces oxygen (secondary) Cools the fire (secondary)

24 Engine Fire Extinguishing: Components

25 Fire Extinguishing Bottle One bottle per engine Discharges through plumbing to nozzles into fire zones

26 Fire Extinguishing Bottle Pressure provides the motive flow for the halon Fully discharges in.08 seconds Zone 1 nozzlesZone 2&3 nozzles

27 Pressure Gauges Pressure indicates quantity of halon available Gauge visible from the wheel well Ambient temperature determines the pressure limits Looking up, LH Main Aft

28 Squibs Pyrotechnic squib cartridge holds plug in place firing the squib releases the plug Halon flows to the discharge nozzles

29 Annunciations C12 Red PUSH TO EXTINGUISH indicates squib is armed Indicates squib has discharged

30 Annunciations 200 Indicates a fire is detected Indicates squib has discharged

31 Actuation C12 Pull appropriate T-Handle Lift clear cover Push the annunciator to discharge the bottle Only fires the bottle that has been armed by the T-Handle

32 Actuation 200 Lift clear cover Push the appropriate annunciator to discharge the bottle One switch per side

33 Test Switch Two remaining positions of the rotary test switch C12 200

34 Electrical Hot battery bus – bottles can be discharged with the batt master off

35 Engine Fire Extinguishing: Operation

36 Test EXTGH portion of rotary switch Tests the circuitry to the squib and discharge light – C12 #1/2 EXTGH DISCH and SQUIB OK C12 #1 & 2

37 Test EXTGH portion of rotary switch Tests the circuitry to the squib and discharge light – 200 D and OK 200

38 Push to Extinguish Pull T-Handle Lift clear cover Press the PUSH TO EXTINGUISH button Look for #1/2 EXTGH DISCH annunciator C12 LH extinguish

39 Push to Extinguish Lift clear cover Press the L/R ENG FIRE PUSH TO EXT button Look for D annunciator 200 LH extinguish

40 Bleed Air Overheat Protection: Components

41 Bleed Air Supply Line Hot bleed air from engine is delivered to cabin P3 air leaves the engine at 640 F A broken line threatens smoke and fire

42 Heat Sense Line Pressurized, plastic line runs along side bleed air lines 18psi originates at pneumatic controller At 204 F the plastic line melts

43 Pressure Switch (C12/200) One for the LH and RH sense lines Below 18psi, this switch closes to warn the pilot Pressure switch located under co-pilot seat

44 Pressure Switch (U21) There are two pressure switches one for each side located just before the check valves.

45 Annunciator Light (C12/200) L/R BL AIR FAIL and MASTER WARNING The pressure switches illuminate these annunciators respectively C12 200

46 Annunciator Light (U21) LH/ RH BLD AIR FAIL and MASTER WARNING U21 A U21 H

47 Bleed Air Overheat Protection: Operation

48 Bleed Air Line Rupture C12/200 The hot air melts the sense line (and anything else around it) The low volume pressure in the sense line escapes Pressure switch closes at18psi L/R BL AIR FAIL annunciator Illumes with MASTER WARNING A loss of pressure in the sense line indicates a serious threat C12 200

49 Bleed Air Line Rupture U21 If a break in the bleed air line should occur the air pressure in the line would drop causing the pressure switch to open and the LH or RH BLD AIR FAIL to illume.

50 Referenced Procedures C12 U21

51 Duct Overtemp Protection: Components

52 Temperature Switch Senses air temperature U21 Between FO rudder peddles C12/200 RH Mid cabin

53 Annunciator DUCT OVERTEMP U21H200 C12 U21A

54 Duct Overtemp Protection: Operation

55 Air Temp in Duct Rises Air in the ducting becomes too hot (potential for smoke) Temperature switch closes circuit (225°F -300°F) DUCT OVERTEMP annunciator illumes U21H 200 C12 U21A

56 Referenced Procedures U21C12

57 Portable Fire Extinguishers

58 Halon blend (2:1) Located under pilot seat and an optional second one could be mounted in the cabin

59 Portable Breathing Devices

60 PBE Part 25 Part 25 required Fixed (stationary, or built in) protective breathing equipment must be installed for the use of the flightcrew, and at least one portable protective breathing equipment shall be located at or near the flight deck for use by a flight crewmember. In addition, portable protective breathing equipment must be installed for the use of appropriate crewmembers for fighting fires in compartments accessible in flight other than the flight deck.

61 EPOS - Model MR-10096AF EPOS Components

62 1. OPEN CLOSURE FLAP OF STOWAGE POUCH. 2. GRASP STOWAGE POUCH W/ ONE HAND AND WITH OTHER HAND PULL RED TAPE STRIP OF BARRIER POUCH. 3. REMOVE THE EPOS UNIT FROM BOTH POUCHES. 4. PULL THE RED BALL WITH ONE HAND WHILE HOLDING THE OXYGEN CYLINDER WITH THE OTHER HAND. EPOS Operation

63 7. REMOVE HOOD AFTER YOU ARE CLEAR OF HAZARD 5. SPREAD NECK SEAL OPEN WITH HANDS. PALMS ARE TO BE FACING EACH OTHER. 6. PULL THE EPOS OVER THE HEAD. EPOS Operation

64 PBE Training Video


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