10.6 Learning from Previous Accidents & Incidents, and Occurrence Reporting
Key Takeaways
- Previous aircraft accidents and incidents are listed in Nig. CARs 2.5.1.3(c) as a knowledge item under cabin crew emergency procedure duties.
- The recurring cabin safety lessons from the accident record are the survivability of most accidents, the ninety-second window, the lethality of smoke and toxic gases, and the cost of retrieving baggage during an evacuation.
- Nig. CARs Part 20 requires operators to implement a safety management system, and Part 15 requires reporting of dangerous goods accidents and incidents.
- Aircraft accident and serious incident investigation in Nigeria is conducted by the accident investigation authority, and Part 8 requires the preservation of flight recorder records after an accident or incident.
- Effective occurrence reporting is factual, contemporaneous and blame-free in tone, because its purpose is to allow the operator and the Authority to see patterns before they cause an accident.
Why case studies are on a licence syllabus
Nig. CARs 2.5.1.3(c) item 10 lists previous aircraft accidents and incidents among the cabin crew emergency procedure duties to be taught. That is unusual for a licence syllabus, and deliberate. Almost every cabin safety rule in this guide exists because something happened.
- Floor proximity emergency escape path marking exists because smoke obscured overhead lighting and occupants could not find exits.
- Lavatory smoke detectors and automatic waste bin extinguishers exist because of in-flight lavatory fires.
- Fire-blocking seat materials exist because burning cabin furnishings produced lethal smoke within minutes.
- Protective breathing equipment exists because crew could not stay in a smoke-filled cabin long enough to fight a fire.
- The exit seating criteria exist because unsuitable occupants delayed the opening of overwing exits.
- Cabin crew jumpseats are crashworthy and harnessed because crew who survived the impact could not then perform the evacuation.
- Joint CRM training exists because crews who did not exchange information lost aircraft that were still flyable.
Studying the record is therefore not history; it is the reasoning behind the procedures a crew member is asked to follow without deviation.
The recurring lessons
| Lesson | What the record shows |
|---|---|
| Most accidents are survivable | A large majority of transport accidents are technically survivable. Survival is determined disproportionately by what happens in the cabin after the aircraft stops |
| The ninety-second window is real | Post-crash fire can render a cabin unsurvivable in about the time the certification standard allows for evacuation. Every second spent on anything other than getting out is taken from that budget |
| Smoke and toxic gases kill more people than flame | Incapacitation from smoke inhalation occurs long before burns. This is why crew stay low, why PBE exists, and why an early report of smoke matters more than a tidy one later |
| Baggage kills | Passengers retrieving cabin baggage block aisles, slow the flow and puncture slides. This is why the evacuation command explicitly orders passengers to leave everything |
| Command language works; polite requests do not | Under acute stress, passengers respond to short, loud, repeated, unambiguous commands. Explanations do not penetrate |
| Crew who brace survive to help | Crew who were not properly braced and secured were frequently injured at impact and unable to perform their duties |
| Half the exits may be unusable | Fire, water, terrain or damage regularly renders exits unusable, which is exactly why the certification demonstration assumes only half are available |
| Silence in the cabin precedes many losses | Information that never reached the flight deck is a recurring theme in the record |
The Nigerian reporting framework
| Requirement | Provision |
|---|---|
| Safety management system — the operator must implement an SMS with hazard identification, risk assessment, safety assurance and safety promotion | Nig. CARs Part 20 |
| Dangerous goods accidents and incidents must be reported | Nig. CARs Part 15, section 15.7 |
| Preservation of flight recorder records in the event of an accident or incident, and retention in safe custody pending disposition determined by the accident investigation authority | Nig. CARs 8.14.10.3 |
| Acts of unlawful interference are notified to the Authority | Nig. CARs Part 17 |
| Flight time, duty period and rest records, including reports on extended flight duty periods and reduced rest, retained for 24 months | Nig. CARs 8.12.1.7 |
| Cabin crew records — licence, training, dangerous goods training, aviation security training and competency checks — retained until 12 months after the crew member has left | Nig. CARs Part 9 |
Investigation of accidents and serious incidents in Nigeria is conducted by the national accident investigation authority, independently of the regulator. The purpose of that investigation is the prevention of future accidents, not the apportionment of blame, and cabin crew statements are an important part of the evidence because the cabin is where survivability is decided.
Writing a report that is worth reading
An occurrence report is the mechanism by which one crew's bad day becomes every crew's improved procedure. What makes a report usable:
- Contemporaneous. Write it while the detail is fresh. Memory reorganises events within hours.
- Factual and sequential. What happened, in order, with times. Separate what you observed from what you inferred.
- Specific. "Smoke from the overhead bin above 18C, grey, thin, no flame visible, first noticed at approximately 0910 local, about 20 minutes after take-off" is usable. "There was smoke in the cabin" is not.
- Complete on the human factors. Say if you were interrupted, rushed, short-crewed, on the last sector of a long duty or working with an unfamiliar variant. That information is the point of the report, not an admission against interest.
- Non-accusatory. Describe actions rather than characters. The purpose is to fix the system, and a report that reads as an accusation invites a defensive response instead of a change.
- Inclusive of near-misses. The events worth reporting most are the ones where nothing happened: the door that was nearly opened while armed, the passenger who was nearly seated in an exit row, the bag that was nearly stowed in a doorway. Those are free lessons.
What to do with the lesson
The final step in the cycle is the one crews most often omit: read what comes back. Operators publish safety bulletins, cabin safety notices and the outputs of their safety management system precisely so that the lessons circulate. A crew member who files reports diligently but never reads the feedback has completed only half the loop.
The regulatory expression of that loop is the recurrent training requirement in Nig. CARs 8.10.1.34, which brings every cabin crew member back through aircraft-specific procedures, joint emergency drills, joint CRM, dangerous goods and security every 12 calendar months. That cycle is where the accident record is converted into what a crew member actually does.
Why are previous aircraft accidents and incidents included in the Nigerian cabin crew knowledge syllabus?
What does the accident record show about the principal cause of death in survivable post-crash cabin fires?
Which of these should be reported through the operator's occurrence reporting system?
Under Nig. CARs 8.14.10.3, what must be done with flight recorder records after an accident or incident?