11.2 In-Flight Firefighting Tactics, Roles & Hidden Fire Suppression

In-Flight Firefighting Tactics, Roles & Hidden Fire Suppression

When a fire erupts inside an aircraft cabin during flight, crew success relies upon aggressive, disciplined teamwork executed without delay. Cabin crew members cannot afford confusion or duplication of effort. Standard Operating Procedures (SOPs) under NCAA and ICAO regulations require the immediate, spontaneous formation of a structured three-person firefighting team to suppress the threat, maintain flight deck communication, and safeguard passengers.

---

1. Dedicated Cabin Firefighting Team Roles & Coordination

The moment smoke or flame is discovered in the cabin, the discovering crew member and responding colleagues must instantaneously assume three distinct roles:

+-----------------------------------------------------------------------+
| DEDICATED CABIN FIREFIGHTING TEAM STRUCTURE                           |
|                                                                       |
| [ FIREFIGHTER ] ----> Attacks Fire Direct with Halon 1211 & PBE       |
| [ COMMUNICATOR ] ---> Maintains Continuous Emergency Flight Deck Link |
| [ RUNNER ] ---------> Retrieves Backup Gear, Ax, Water & Controls Pax |
+-----------------------------------------------------------------------+

1. Firefighter (Primary Attack Crew Member)

• Role Assignment: The first crew member to discover the fire or smoke immediately assumes the role of Firefighter. This crew member must not leave the fire site to report the incident.
• Primary Actions:
  • Immediately retrieves the nearest Halon 1211 fire extinguisher and dons a Protective Breathing Equipment (PBE) hood.
  • Positions themselves at a safe distance (6 to 8 feet / 1.8 to 2.4 meters) from the fire source.
  • Directs the Halon nozzle at the base of the flames, discharging the agent in sweeping, controlled bursts.
  • Maintains physical contact with the fire site until the fire is completely extinguished and dampening is complete.

2. Communicator (Flight Deck Liaison & Tactical Relayer)

• Role Assignment: The second crew member arriving at the scene immediately assumes the role of Communicator.
• Primary Actions:
  • Immediately contacts the Flight Deck via the interphone system using the dedicated Emergency Call protocol (e.g., dialing 2222 or pressing EMER CALL).
  • Relays clear, concise, real-time tactical intelligence directly to the Captain:
    1. Exact Location: Specific cabin seat row, overhead bin section, galley number, or lavatory identifier.
    2. Suspected Source: Electrical wiring, passenger baggage, galley oven, lavatory waste bin, or PED.
    3. Severity & Flame Height: Extent of visible flame activity and rapid growth rate.
    4. Smoke Characteristics: Density (light, medium, dense acrid), color (white, grey, pitch black), and odor (burning plastic, electrical ozone, paper, chemical).
    5. Action Taken: Number of Halon extinguishers discharged and current fire status.
    6. Passenger Situation: Relocation status and cabin atmosphere conditions.
  • Remains dedicated on the interphone line, providing continuous real-time updates until the flight deck acknowledges landing/diversion plans.

3. Runner (Equipment Support & Cabin Coordinator)

• Role Assignment: The third crew member arriving at the scene assumes the role of Runner.
• Primary Actions:
  • Retrieves additional emergency equipment to the fire scene, including backup Halon 1211 bottles, Water extinguishers, extra PBE units, fire-resistant gloves, and the crash axe.
  • Passes equipment directly to the Firefighter as needed.
  • Moves passengers away from the smoke/fire zone toward unaffected forward or aft cabin areas, re-seating them where possible.
  • Distributes wet towels or cloths to passengers, instructing them to cover their nose and mouth to filter toxic smoke particles.

ABSOLUTE REGULATORY WARNING (Nig. CARs / ICAO): NEVER DEPLOY PASSENGER CABIN OXYGEN MASKS DURING A CABIN FIRE! Pulling cabin oxygen masks down initiates chemical oxygen generators or flows gaseous oxygen through cabin drop-down lines. Flowing oxygen enriches the cabin atmosphere, accelerates combustion, and creates an extreme risk of explosive flashover.

---

2. Triangulation & Identification of Hidden Fires

Hidden fires occurring behind cabin sidewall panels, ceiling lining, lavatory walls, galley bulkheads, or air conditioning ducts are uniquely dangerous because they can smolder undetected until superheated combustion gases ignite violently.

Thermal Triangulation Protocol

To locate the exact epicenter of a hidden fire behind interior panels, crew members must execute thermal triangulation:

1. Back of the Hand Touch Method: Gently move the BACK OF THE HAND along panel surfaces, door seams, and ceiling tracks.
   • Rationale: The back of the hand is extremely sensitive to radiant heat variations. Using the palm must be avoided because accidental contact with a scorching surface causes palmar burns, rendering the crew member unable to grip extinguishers or equipment.
2. Isolating Hot Spots: Locate the region of highest temperature concentration (the hot spot) where flames are actively feeding behind the panel structure.

+-----------------------------------------------------------------------+
| Hidden Fire Access Hole Halon Injection Protocol                      |
|                                                                       |
| Step 1: Feel panel using BACK OF THE HAND to locate hot spot.         |
| Step 2: Lever panel slightly (1-2 in) with CRASH AXE pick end.        |
| Step 3: Insert Halon nozzle into crack and discharge agent.           |
| Step 4: Reclose panel and seal opening with DAMP BLANKETS/TOWELS.     |
+-----------------------------------------------------------------------+

Preventing Oxygen Flashover

• The Flashover Hazard: Completely ripping open or pulling down an interior panel introduces a massive surge of ambient oxygen into an oxygen-starved, superheated compartment. This results in instant flashover—a explosive wall of flame that engulfs the cabin.
• Access Hole Method:
  • Use the pick end of the crash axe or a lever tool to carefully pry open a small crack (1 to 2 inches / 2.5 to 5 cm) at the top of the hot panel.
  • Alternatively, puncture a small access hole directly through the honeycomb panel wall above the hot spot.
  • Insert the discharge nozzle of the Halon 1211 extinguisher into the small aperture.
  • Discharge the entire contents of the Halon bottle into the enclosed cavity.
  • Immediately close or seal the aperture with damp towels or wet blankets to trap the Halon gas and choke off oxygen supply.

---

3. Tactical Firefighting in Specific Cabin Zones

Cabin crew members must adapt their extinguishing tactics depending on the specific location of the fire within the aircraft cabin:

A. Overhead Stowage Bins

• Keep the overhead bin door closed to contain smoke and starve oxygen.
• Don PBE and prepare Halon extinguisher.
• Open the bin door cautiously by 1 to 2 inches while standing to one side (using the bin door as a thermal shield).
• Insert nozzle, discharge Halon, and slam the bin door shut immediately.
• Wait 30 seconds for agent concentration to take effect, then re-inspect while wearing PBE.

B. Galley Ovens

• Immediately shut off galley master power switch and pull associated circuit breakers to isolate Class C electrical energy.
• Keep the oven door closed to starve the fire of oxygen.
• Stand behind the oven door, crack it open 1 inch, discharge Halon directly into the oven cavity, and reclose the door immediately.
• Do NOT spray liquid water inside an electrical galley oven until electrical isolation is confirmed.

C. Lavatory Doors

• Feel the lavatory door and door handle with the back of the hand.
• If hot, do not open the door fully. Stand behind the door frame for protection.
• Crack the door open 1 to 2 inches, aim Halon extinguisher toward the waste bin or ceiling cavity, discharge agent, and re-close the door.
• If cold, enter cautiously with PBE, locate smoke source, and attack base of fire.

D. Seating Materials & Cabin Carpet

• Attack surface flames with Halon 1211.
• Once surface flames are knocked down, deep-seated smoldering in polyurethane seat foam must be drenched with water extinguishers or non-flammable liquids (coffee, tea, juice) to penetrate internal core embers.

---

4. Post-Fire Suppression, Dampening & Continuous Firewatch

Extinguishing visible flames with Halon 1211 does not conclude the emergency. Because Halon suppresses flames chemically without providing significant thermal cooling, deep-seated Class A embers can easily re-ignite once Halon gas dissipates.

Mandatory Post-Fire Dampening Procedure

1. Drenching Deep Embers: Immediately drench all affected solid materials (seat cushions, carpets, clothing, papers, luggage contents) with liquid water or non-flammable cabin beverages (club soda, fruit juice, cold coffee). Never use alcoholic beverages or oil-based liquids.
2. Debris Inspection: Using fire-resistant gloves or the crash axe handle, carefully break apart smoldering debris and turn over burnt materials to verify complete extinction down to the core.
3. Continuous Firewatch: The Cabin Senior / Purser must assign a dedicated crew member to maintain an uninterrupted continuous firewatch at the incident site. This crew member must monitor the area continuously with a ready Halon extinguisher until the aircraft lands on the ground and hands over control to airport Emergency Rescue and Firefighting (ARFF) services.