**Appendix B**

### **Table A2.** MxFACS Taxonomy (Insley, 2018).

 **Failures**  **Level** **3**

**System**/**Component**

Cabin fume eventInsulation blanket fumes

**Occurrence**

 **Level 2** 

**Level 1**

CollisionCollision with buildingCollision with terrainCollision with water

DepressurisationProgressive depressurisationRapiddepressurisation

Diversion or Air TurnbackAir turnbackDiversion

> FireIn-flight fireOn-ground fire

In-flight shut downIn-flight engine shut down

Landing-related eventsApproach and landing without autoflight assistance Degraded hydraulic system functionality during landing Ditching

Engine failure upon landing

Forced landingHard landingLanding short of runwayWheels-up landing

1.8 LG-related eventIn-flight LG-related eventOn-ground LG-related event

> Runway-related eventRunway excursion

Structural damageEmpennage damageLower fuselage structural damageWing structural damage
