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Kemble > 7.19 Abnormal Events > Flashcards

7.19 Abnormal Events Flashcards

1
Q

What does chapter 5 of the AMM dictate

A

the checks and inspections required after
an abnormal event has been reported

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2
Q

How many stages are there to a check and why would the next stages be carried out

A

There’s 2 and the second one is only carried out if the first check shows signs of damage

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3
Q

At what’s heights are lightning strikes more prevalent

A

5,000 to 15,000 feet

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4
Q

Are long haul or short haul flights more prone to getting struck by lightning

A

Short haul

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5
Q

What’s does a single bolt of lightning contain in Amps and volts

A

1 million volts and 30,000

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6
Q

What are stepped ladders

A

refer to the path of ionized air containing a charge emanating from a charged aircraft or cloud

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7
Q

What causes the wing tips to glow after a lightning

A

Ionisation of the air surrounding the sharp edges of the aircraft’s structure

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8
Q

What causes ionisation of the air surrounding an aircraft

A

caused by an increase in the electromagnetic field density at those locations

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9
Q

What happens when a leader from the aircraft reaches a leader from the cloud

A

A strike to the ground can continue through it and it will become apart of the event

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10
Q

What’s the basic protection aircraft’s have to protect from lightning strikes

A

All metal structure

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11
Q

What two things does the air rafts exterior structure help protect against

A

Electro magnetic interference and lightning strikes

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12
Q

What’s the difference between direct and indirect damage from lightning strikes

A

Direct Damage - Surface is burned, melted or shows signs of metallic distortion at two or more attachment points.
• Indirect Damage - Large electrical transients on the wiring which might cause damage to electrical systems equipment.

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13
Q

What must occur if a lightning strikes caused a system malfunction

A

A full inspections of that system must be carried out

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14
Q

What size holes are possible if a high intensity lightning strike occurs

A

1/4 inch hole or greater

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15
Q

What size holes do lighting strikes usually make

A

1/8 of an inch

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16
Q

Hat can happen in result to an aircraft being struck by lightning

A

It can become strongly magnetised

17
Q

What’s does HIRF stand for

A

High intensity radio frequency

18
Q

In what year did all aircraft have to comply with HIRF requirements

A

1992

19
Q

What effect does the increase in use of none metallic materials in the construction of aircraft have

A

Reduces basic shielding capabilities against radiation

20
Q

Why must new aircraft designs be tested against before being certified

A

To test against electromagnetic penetration

21
Q

When are phase 1 inspections carried out

A

when a Hard Landing or a High Drag/Side Load Landing occurs.

22
Q

When would a phase 2 inspection be carried out

A

When a phase 1 inspections shows damage

23
Q

Who decides if a hard landing has occurred and how do they work that out

A

The pilot by checking the aircraft instruments

24
Q

What are the two types of damage lightning strikes generally cause and what’s the difference

A

Indirect and direct

Direct- surface is burnt or melted
Indirect- da,age to electrical systems

25
Q

How’s severe turbulence identified

A

Turbulence which causes large changes in altitude and attitude

26
Q

What section of the AMM are hazardous incidents covered

A

Chapter 5

27
Q

What’s the most basic form of protection for an aircraft when subjected to a lightning strike

A

The all metal external structure

28
Q

When carrying our inspections for damage caused by lightning strikes what sort of damage will be being looked for

A

Small circular melt marks, burnt or discoloured skin/rivets

29
Q

How do authorities ensure aircraft are protected by HIRF

A

by ensuring they comply with HIRF requirements 1992

30
Q

What are the main concerns for authorities about HIRF

A

That due to aircraft’s now being highly reliant on electrics that it can be electromagnetically interfered
That the increasing use of non metals on the aircraft means they didn’t have there shielding capabilities against radiation

31
Q

What’s happened in regarding new aircraft and modifications with regard to HIRF

A

They must be tested against electromagnetic penetration and if a problems identified it must be redesigned

32
Q

When should a phase 2 inspection be carried out with hard landings

A

When the phase 1 inspection shows damage

33
Q

If an overweight aircraft has a hard landing what inspections are required

A

Hard landing inspection and a overweight landing inspection

34
Q

When would an over limit inspection be carried out

A

After severe or unusual turbulence

Kemble (39 decks)

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