10.2 Brace Positions, Evacuation Commands & Exit Assessment

Brace Positions, Evacuation Commands & Exit Assessment

During extreme landing emergencies, survivability depends on three core cabin crew capabilities: mitigating severe impact forces through proper brace mechanics, directing disoriented passengers with loud assertive vocal commands, and conducting split-second exit assessments before dispatching evacuees down slides. Mastery of these physical and tactical skills is a primary focus of NCAA cabin crew certification.

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Biomechanics of Passenger & Crew Brace Positions

The fundamental purpose of a brace position is two-fold: (1) to pre-position the body against structural surfaces to eliminate secondary impact velocity, and (2) to bend the upper body over the lap to protect vital organs and prevent violent spinal hyper-extension during extreme deceleration forces (G-forces).

Passenger Brace Positions

Cabin Crew Jumpseat Brace Positions

Cabin crew members occupy specialized jumpseats equipped with four-point or five-point harness systems (shoulder straps and lap belts). Harness straps must be pulled tight without slack. Crew brace mechanics differ strictly based on jumpseat facing direction:

Cabin Crew Jumpseat Brace Alignment

  FORWARD-FACING JUMPSEAT                  AFT-FACING JUMPSEAT
 +-----------------------+               +-----------------------+
 | Harness: Locked Tight |               | Harness: Locked Tight |
 | Feet: Flat on Floor   |               | Feet: Flat on Floor   |
 | Hands: Palms under    |               | Hands: Palms under    |
 |        Thighs / Lap   |               |        Thighs / Lap   |
 | HEAD: CHIN TO CHEST   |               | HEAD: FLAT AGAINST    |
 |       (Tucked Down)   |               |       HEADREST        |
 +-----------------------+               +-----------------------+

• Forward-Facing Jumpseat: Deceleration forces throw the torso and head forward. The crew member must tuck their chin firmly down against the sternum/chest, keep feet flat on the floor, and place hands flat (palms up) under thighs or folded across the lap. Tuck chin to chest prevents facial impact against bulkheads.
• Aft-Facing Jumpseat: Deceleration forces push the torso and head backward into the seat back. The crew member must press their head flat and firmly backward against the headrest, keep feet flat on the floor, and tuck hands under thighs. Pressing head to headrest prevents severe cervical spine whiplash.

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The 30-Second Silent Review (OLDABC / CLAP)

Every cabin crew member must execute a mandatory 30-Second Silent Review during the critical phases of flight: during the takeoff roll up to 1,000 feet altitude, and during initial approach below 10,000 feet through touchdown. During these 30 seconds, crew sit silently in their jumpseats in full brace posture and mentally rehearse emergency procedures.

Acronym Frameworks: OLDABC and CLAP

Cabin crew utilize structured memory acronyms to conduct this review:

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Standardized Loud Evacuation Commands

During emergency evacuations, passengers experience high stress, confusion, and temporary hearing or cognitive impairment. Cabin crew must use a loud, assertive, command-pitch voice—shouting short, direct, positive action imperatives. Crew must avoid weak phrases like 'Please exit the aircraft' or negative phrasing like 'Don't panic.'

Phased Evacuation Command Directives

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Exit Assessment & Manual Slide Inflation Protocol

Before opening any floor-level emergency door or overwing exit, cabin crew must perform an immediate Exit Assessment through the door viewport or observation window.

Exit Assessment Criteria

Crew must evaluate four critical external conditions:

1. Fire or Heavy Smoke: If flames or dense engine smoke are visible outside the window, the exit is UNSAFE. Opening it would draw toxic smoke and fire into the cabin (chimney effect).
2. Water Level: In ditching, if water level is above the door sill, opening the door causes catastrophic water flooding.
3. Obstructions / Structural Wreckage: Collapsed buildings, trees, or torn fuselage metal blocking the exit path.
4. Landing Gear Collapse Angle: Extreme tilt that renders slide angle too steep or inverted.

Manual Slide Inflation Procedure

When an exit is assessed as SAFE, the crew member operates the door handle fully to the OPEN position. Modern commercial aircraft doors feature automatic power assist systems that push the door open and pull the slide pack out of the bustle, triggering automatic pneumatic slide inflation.

However, automatic systems can fail. Cabin crew must ALWAYS look at the slide pack during door opening to verify inflation.

Exit Assessment & Slide Inflation Decision Tree
+-------------------------------------------------------------+
|                  LOOK THROUGH DOOR VIEWPORT                 |
+-------------------------------------------------------------+
                               |
        +----------------------+----------------------+
        |                                             |
 [Hazard Present: Fire/Smoke/Water]        [Outside Clear & Safe]
        |                                             |
        v                                             v
 BLOCK EXIT WITH ARMS IN 'X'                 OPEN DOOR FULLY TO LATCH
 Shout: 'EXIT BLOCKED! GO AFT!'                       |
                                                      v
                                            CHECK SLIDE INFLATION
                                                      |
                                  +-------------------+-------------------+
                                  |                                       |
                        [Slide Inflating]                         [Slide Fails to Inflate]
                                  |                                       |
                                  v                                       v
                       DIRECT PASSENGERS TO SLIDE        PULL RED MANUAL INFLATION HANDLE
                       'JUMP AND SLIDE!'                                  |
                                                                          v
                                                                Check Slide Inflation Again
                                                                          |
                                                    +---------------------+---------------------+ 
                                                    |                                           |
                                          [Slide Now Inflates]                      [Slide Still Fails]
                                                    |                                           |
                                                    v                                           v
                                         DIRECT PASSENGERS TO SLIDE               BLOCK EXIT & REDIRECT

If the slide fails to inflate automatically within 2-3 seconds, the crew member must instantly reach down and PULL THE RED MANUAL INFLATION HANDLE, located on the right side of the door threshold / girt bar assembly. Crew must shout: 'PULL MANUAL HANDLE!' while tugging the handle firmly. If the slide still fails to inflate after manual actuation, the crew member must treat the exit as inoperative, block the exit, and redirect passengers to alternate usable exits.