slide1
Download
Skip this Video
Download Presentation
King Air Ground School

Loading in 2 Seconds...

play fullscreen
1 / 64

King Air Ground School - PowerPoint PPT Presentation


  • 154 Views
  • Uploaded on

King Air Ground School. 26 - Fire Protection. 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

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' King Air Ground School' - blue


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
slide1
King Air Ground School

26 - Fire Protection

slide2
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

slide4
Sensors / Detectors

Infrared photocells

slide5
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 3

Zone 2

slide6
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

L Engine Fire Detected

No fire detected

slide7
Annunciators

U21A “LH/RH FIRE WARNING” and “FAULT WARN”

U21H “FIRE L/R ENG” and “MASTER WARNING”

U21H

U21A

slide8
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

slide9
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

200

C12

slide10
Electrical

Circuit Breaker in Cockpit – with CB pulled, detection won’t work

Dual-fed bus – power must be on the aircraft in order to detect

200

U21

C12

slide12
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 3

Position 2

slide13
Test

Sensors are tested by increasing the output voltage of each sensor

slide14
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

slide15
Test

C12

Both T-handle “#1/2 FIRE PULL” annunciators illuminate

“MASTER WARNING” is triggered

C12

slide16
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

slide17
Fire Indication

An actual fire has the same indications but will only be on the side of the fire

U21A

U21H

200

C12

slide18
Referenced Procedures

Engine Fire/Failure/Severe Damage

Evacuation/Engine Fire on the Ground

U21

C12

slide21
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

slide22
Aviation Uses

1301 used commonly for engine extinguishing

1211 or blend commonly used for portable fire extinguishers

Portable

Engine Extinguishing

slide23
Extinguishes Fire By:

Chemically combining with atoms which are propagating the fire, preventing combustion reaction (primary)

Displaces oxygen (secondary)

Cools the fire (secondary)

slide25
Fire Extinguishing Bottle

One bottle per engine

Discharges through plumbing to nozzles into fire zones

slide26
Fire Extinguishing Bottle

Pressure provides the motive flow for the halon

Fully discharges in .08 seconds

Zone 2&3 nozzles

Zone 1 nozzles

slide27
Pressure Gauges

Pressure indicates quantity of halon available

Gauge visible from the wheel well

Ambient temperature determines the pressure limits

Aft

Looking up, LH Main

slide28
Squibs

Pyrotechnic squib cartridge holds plug in place

“firing” the squib releases the plug

Halon flows to the discharge nozzles

slide29
Annunciations

C12

Red “PUSH TO EXTINGUISH” indicates squib is armed

Indicates squib has discharged

slide30
Annunciations

200

Indicates a fire is detected

Indicates squib has discharged

slide31
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

slide32
Actuation

200

Lift clear cover

Push the appropriate annunciator to discharge the bottle

One switch per side

slide33
Test Switch

Two remaining positions of the rotary test switch

200

C12

slide34
Electrical

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

slide36
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

slide37
Test

EXTGH portion of rotary switch

Tests the circuitry to the squib and discharge light

200 “D” and “OK”

200

slide38
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

slide39
Push to Extinguish

Lift clear cover

Press the “L/R ENG FIRE PUSH TO EXT” button

Look for “D” annunciator

200 LH extinguish

slide41
Bleed Air Supply Line

Hot bleed air from engine is delivered to cabin

P3 air leaves the engine at 640⁰F

A broken line threatens smoke and fire

slide42
Heat Sense Line

Pressurized, plastic line runs along side bleed air lines

18psi originates at pneumatic controller

At 204⁰F the plastic line melts

slide43
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

slide44
Pressure Switch (U21)

There are two pressure switches one for each side located just before the check valves.

slide45
Annunciator Light (C12/200)

“L/R BL AIR FAIL” and “MASTER WARNING”

The pressure switches illuminate these annunciators respectively

200

C12

slide46
Annunciator Light (U21)

“LH/ RH BLD AIR FAIL” and “MASTER WARNING”

U21 A

U21 H

slide48
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

200

C12

slide49
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.

slide52
Temperature Switch

Senses air temperature

U21

Between FO rudder peddles

C12/200

RH Mid cabin

slide53
Annunciator

“DUCT OVERTEMP”

C12

U21A

U21H

200

slide55
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

C12

U21A

U21H

200

slide58
Halon 1211-1301 blend (2:1)

Located under pilot seat and an optional second one could be mounted in the cabin

slide60

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.

slide61

EPOS Components

EPOS - Model MR-10096AF

slide62

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.

EPOS Operation

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.

slide63

5. SPREAD NECK SEAL OPEN WITH HANDS. PALMS ARE TO BE FACING EACH OTHER.

6. PULL THE EPOS OVER THE HEAD.

EPOS Operation

7. REMOVE HOOD AFTER YOU ARE CLEAR OF HAZARD

ad