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Difference between "Accident" and "Incident"

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Difference between "Accident" and "Incident"

Old 22nd Feb 2011, 20:43
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Difference between "Accident" and "Incident"


For a study, I need some advice for a study: According to the ICAO Annex 13 an occurence is an "accident" when "The aircraft sustains damage or structural failure". An "Incident" is "assoiacted with the operation which affect the safety of operation".

Now, where in the real live is the difference, "Incident" a "Accident" which ended with a "substantial damage", but no "hull loss"?

My problem is for instance: Is the double engine failure of the Qatar A330 back in 2006 an "Incident" or a "Accident" which has to be investigated by the official bodies in accordance to ICAO Annex 13?

Could somebody give me an advice or some example?

Stubenfliege 2 is offline  
Old 22nd Feb 2011, 22:45
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I am not an authority, however you will find definitions in here... http://www.aaib.gov.uk/cms_resources...estigation.pdf ...which are pretty good. Hope this helps.
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Old 22nd Feb 2011, 22:54
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Is the double engine failure of the Qatar A330 back in 2006 an "Incident" or a "Accident"
Neither, it's a "Serious Incident" similar to a very interesting BA 747 G/A over the top of a hotel formerly known as the "Penta." These should be investigated by the appropriate authorities.
Piltdown Man is offline  
Old 23rd Feb 2011, 08:17
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Originally Posted by Stubenfliege 2
My problem is for instance: Is the double engine failure of the Qatar A330 back in 2006 an "Incident" or a "Accident" which has to be investigated by the official bodies in accordance to ICAO Annex 13?
"Has to be..."? "Accordance". I think there is some vestige of a misunderstanding of international law.

What constitutes an incident or accident is for national authorities, who are sovereign in their airspace, to decide (or not) in national laws.

The ICAO agreement is deliberately vague in its wording, so that it fits the definitions of its member states at the time the agreement was formulated.

So, the way to answer your question is as follows. First find out who has jurisdiction over the event. Then look up that country's laws concerning what constitutes an aeronautical incident or accident. Finally, classify accordingly.
PBL is offline  
Old 6th Mar 2011, 17:16
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"For a study, I need some advice for a study: According to the ICAO Annex 13 an occurence is an "accident" when "The aircraft sustains damage or structural failure". An "Incident" is "assoiacted with the operation which affect the safety of operation"."
No mention of people?
JuergenP is offline  
Old 10th Mar 2011, 13:15
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In Accidet We Have Fatalitis But Normaly At An Incident Any One Is Not Killed:o
ALI-SAFARI-IR. is offline  
Old 10th Mar 2011, 14:51
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Ali... Not strictly true. For example, the BA 777 which crashed at Heathrow was an Accident, but there was no loss of life.
Old 10th Mar 2011, 15:08
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In the United States, the National Transportation Safety Board establishes the criteria, and they're spelled out in Title 49 of the Code of Federal Regulation.

Aircraft Accident is defined by 49 CFR 830.2 as:
"Aircraft accident" means an occurrence associated with the operation of an aircraft which takes place between the time any person boards the aircraft with the intention of flight and all such persons have disembarked, and in which any person suffers death or serious injury, or in which the aircraft receives substantial damage. For purposes of this part, the definition of "aircraft accident" includes "unmanned aircraft accident"

Aircraft Incident is defined as:
"Incident" means an occurrence other than an accident, associated with the operation of an aircraft, which affects or could affect the safety of operations.

A fatal injury is any injury resulting in death within 30 days of the accident.

Serious Injury is defined as:
"Serious injury" means any injury which: (1) requires hospitalization for more than 48 hours, commencing within 7 days from the date the injury was received; (2) results in a fracture of any bone (except simple fractures of fingers, toes, or nose); (3) causes severe hemorrhages, nerve, muscle, or tendon damage; (4) involves any internal organ; or (5) involves second or third degree burns, or any burns affecting more than 5 percent of the body surface.

Substantial Damage is defined as:
"Substantial damage" means damage or failure which adversely affects the structural strength, performance, or flight characteristics of the aircraft, and which would normally require major repair or replacement of the affected component. Engine failure or damage limited to an engine if only one engine fails or is damaged, bent fairings or cowling, dented skin, small punctured holes in the skin or fabric, ground damage to rotor or propeller blades, and damage to landing gear, wheels, tires, flaps, engine accessories, brakes, or wingtips are not considered "substantial damage" for the purpose of this part.

Accident criteria for unmanned aircraft are also spelled out.

The NTSB provides further definition and requires immediate notification in the event of any of the following items (49 CFR 830.5):

830.5 Immediate notification.

The operator of any civil aircraft, or any public aircraft not operated by the Armed Forces or an intelligence agency of the United States, or any foreign aircraft shall immediately, and by the most expeditious means available, notify the nearest National Transportation Safety Board (NTSB) office1 when:
(a) An aircraft accident or any of the following listed serious incidents occur:
(1) Flight control system malfunction or failure;
(2) Inability of any required flight crewmember to perform normal flight duties as a result of injury or illness;
(3) Failure of any internal turbine engine component that results in the escape of debris other than out the exhaust path;
(4) In-flight fire;
(5) Aircraft collision in flight;
(6) Damage to property, other than the aircraft, estimated to exceed $25,000 for repair (including materials and labor) or fair market value in the event of total loss, whichever is less.
(7) For large multiengine aircraft (more than 12,500 pounds maximum takeoff weight);
(i) In-flight failure of electrical systems which requires the sustained use of an emergency bus powered by a backup source such as a battery, auxiliary power unit, or air driven generator to retain flight control or essential instruments;
(ii) In-flight failure of hydraulic systems that results in sustained reliance on the sole remaining hydraulic or mechanical system for movement of flight control surfaces;
(iii) Sustained loss of the power or thrust produced by two or more engines; and
(iv) An evacuation of an aircraft in which an emergency egress system is utilized.
(8) Release of all or a portion of a propeller blade from an aircraft, excluding release caused solely by ground contact;
(9) A complete loss of information, excluding flickering, from more than 50 percent of an aircraft's cockpit displays known as:
(i) Electronic Flight Instrument System (EFIS) displays;
(ii) Engine Indication and Crew Alerting System (EICAS) displays;
(iii) Electronic Centralized Aircraft Monitor (ECAM) displays; or
(iv) Other displays of this type, which generally include a primary flight display (PFD), primary navigation display (PND), and other integrated displays;
(10) Airborne Collision and Avoidance System (ACAS) resolution advisories issued either:
(i) When an aircraft is being operated on an instrument flight rules flight plan and compliance with the advisory is necessary to avert a substantial risk of collision between two or more aircraft; or
(ii) To an aircraft operating in class A airspace.
(11) Damage to helicopter tail or main rotor blades, including ground damage, that requires major repair or replacement of the blade(s);
(12) Any event in which an operator, when operating an airplane as an air carrier at a public-use airport on land:
(i) Lands or departs on a taxiway, incorrect runway, or other area not designed as a runway; or
(ii) Experiences a runway incursion that requires the operator or the crew of another aircraft or vehicle to take immediate corrective action to avoid a collision.
(b) An aircraft is overdue and is believed to have been involved in an accident.
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Old 10th Mar 2011, 16:03
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Incident when you crap yourself Accident:- When you crap yourself and someone else finds out
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