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ATA 26 FIRE PROTECTION.

INTRODUCTION
The airplane is equipped with a fire protection system, which provides the flight crew with
detection, warning, fuel shut-off and fire extinguishing capability.

The fire protection system is designed to warn the crew in case of fire, overheat or smoke in
certain aircraft zones.

The fire protection system is designed to warn the crew in case of fire, overheat or smoke in
certain aircraft zone.

The rear or forward (optional) toilet can also be equipped with an (optional) smoke detector
that activates a message within the CAS window displays.

The overhead control panel and CAS windows provide the fire protection system interfaces
and controls for the flight crew.

Five fire extinguisher cylinders are located in the mechanic servicing compartment, which
provides fire protection for each engine, the APU and the baggage compartment.

The sixth fire extinguisher cylinder, located within the No 2 engine compartment, provides
dedicated fire protection to the mechanic servicing compartment (rear compartment).

The six cylinders are dedicated to:
- cylinder 1: Rear Compartment,
- cylinder 2: Baggage compartment or APU,
- cylinder 3: Discharge 1 Engine 1 or Discharge 2 Engine 2,
- cylinder 4: Discharge 1 Engine 2 or Discharge 2 Engine 1,
- cylinder 5: Discharge 1 Engine 2 or Discharge 2 Engine 3,
- cylinder 6: Discharge 1 Engine 3 or Discharge 2 Engine 2.

The engine fire extinction system is designed to enable up to two successive discharges: one
cylinder discharge per percussion on No 1 and No 3 engines, and two cylinder discharge per
percussion on No 2 engine because of its location within the aft fuselage section. The second
discharge is available in case the engine fire persists after the first one.

SUMMARY OF FIRE AND SMOKE DETECTORS
The Fire protection system features:
- 2 pneumatic detectors for each engine (total of 6),
- 1 pneumatic detector for the APU,
- 1 pneumatic detector for the rear compartment,
- 1 pneumatic detector for each wheel well (total of 2),
- 1 smoke detector in the baggage compartment.

http://www.smartcockpit.com/data/pdfs/plane/bombardier/DASH-8-400/systems/Q400-Fire_Protection.pdf
http://www.newportaero.com/home/ATA_CHAPTER
http://www.airlines.org/search/results.aspx?k=ATA%2026%20FIRE%20PROTECTION
http://www.smartcockpit.com/data/pdfs/plane/dassault/FALCON-7X/systems/Falcon_7X-Fire_Protection.pdf
http://www.sjap.nl/26.htm






1. DETECTION
Detection of fire or overheat is performed:
- For each engine: by two pneumatic detectors,
- For the APU: by one pneumatic detector,
- For the rear compartment: by one pneumatic detector.
Detection of fire or smoke in the baggage compartment is performed by a smoke detector.
Detection of overheat in the main wheel wells is performed by one pneumatic detector in
each main wheel well.
2. EXTINCTION OF FIRE
Fire extinction is performed:
- For the engines, APU and rear compartment: by the closure of the Shut Off Valves
(SOV) and four built-in extinguishers,
- For the cockpit or cabin: by three portable extinguishers,
- For the baggage compartment, by
o Three portable extinguishers, or
o One of the four built-in extinguishers.
3. AUXILIARY FUNCTIONS IN CASE OF ENGINE OR APU FIRE
For each engine: when the crew pushes the corresponding “FIRE” button of the Fire Control
Panel:
- The corresponding Hydraulic and Fuel Shut Off Valves are closed,
- The corresponding generator is disconnected, (used for emergency landing procedure
as, in other conditions, the engine will have been shut off first),
In addition, for engine 2:
- The Air Turbine Starter Valve (ATSV) is automatically closed,
- The Thrust Reverser is inhibited.
For the APU: when the fire is detected:
- The Fuel Shut Off Valve is automatically closed,
- The generator is automatically disconnected,
- An emergency shut down is commanded by the ECU.

My opinion!!
in the past there was not fire protection system in aircrafts and it was difficult to detect and control fire or smoke within the aircraft,
there was a lot of accidents and death´s because of this system, nowadays the aircrafts have this equiment system and it´s very sofisticated,
because each engine and component of the airplane that its in risk of burn, it has a detector and controler of fire and smoke that it alert inmediately
to the cockpit, and pilots can activate the fire control system or with sensors can be activate automatically the extintors, for example each engine
has two neumatic detectors that it are activate atimatically in case of a fire or smoke in the engine. And I think that this ATA 26 is the most important.
.


Fire protection is provided by shutting-off fuel to the engine or APU when engine or APU fire
has been detected and by discharging fire extinguishing agent into the concerned area
(engine, APU, rear or baggage compartment).
Fire protection system controls and test button and circuit protection interfaces are located
within the flight deck.

SMOKE DETECTOR
The smoke detector is of a "photoelectric" type which allows differentiating dust from smoke
to avoid false alarms.
A smoke detector is installed in the baggage compartment.
􀂾 Refer to ATA 26 - DESCRIPTION-SUPPLEMENTARY INFORMATION for additional
information.


Introduction-mary
The fire protection is designed to warm about in case of fire.
This system have detectors throughout the aeroplane, that provide smoke detection and extinguishing of fire conditions.
this system have detectors throughout the aeroplane.

Indications are provoded by :
*Engines
*APU
*Baggage compartment
For this reason we consider ATA 26 an important system.
In this document we talk about the controls, design priciples and location of equipment.