Maintenance Practices M7.18 Flashcards
What is primary structure
Highly stressed
If damaged may result in loss of aircraft
What is LAMP
Light Aircraft Maintenance Program
CAA say how often certain checks must be done
What is LAMS
Non EASA light aircraft
What is corrosion level definition Level 1
Regularly found - no change in program required
What is corrosion definition Level 2
Program not effective - needs amendment
What is corrosion level 3
Most serious
Program not effective and all aircraft in fleet must be checked
What happens when bearings are overlubricated
CHURNING
High temps can occur which is a fire hazard
What are the two main bearing defects
- False brinelling
- True Brinelling
What is elyptical wear marks in an axial direction on a bearing
False brilelling
What is it called when bearings have static overload or severe impact
True brinelling
After cleaning bearings what must be done
They must be re greased within 2 hours
What must be done if a component has intergranular corrosion
Must be replaced
What type of endoscope must be used in a heat sensitive area
2nd type because they provide cold light
What is a type 1 endoscope
Fixed
What is a type 3 endoscope
Flexible
What is allowable damage within the damage classifications
Slight or little insignificance
What is non allowable damage
Exceeds allowable damage
What is non repairable damage
Replacement
What are the main corrosion removal techniques
- By hand for light corrosion
- wire brush (stainless or aluminium only
- grinding wheels (not on ally)
- abrasive blasting
What is abrasive blasting used for
To remove filiform corrosion
When blending titanium what must you have on standby
Non water based fire extinguisher
What is CAA surface protection
Chromic Acid Anodising
What is CCC surface protection
Chemical Conversion Coating
How many layers of paint do airbus aircraft have
3
How many layers of paint do Boeing airbus have
2
What are the 3 types of surface protection repair
- Fixing
- partial
- Basic renewal
What type of paint must be avoided on antennas
Electrically conductive
What corrosion protection substance must not be used near oxygen
Dinitrol
What must cover 75% of countersinks
Electrically conductive paint
What is the most common water repellant
Dinitrol
What shows up when doing Die pen if there is a crack
Red line or red dots
Can there still be a crack if nothing shows during die pen
Yes
What ray is better picture than gamma ray
X ray more isotopes
What are the disadvantages of x ray
- Everyone must be evacuated
- users require health check
What is eddy current used for
For surface and just beneath surface flaws
Does eddy current require paint removal
No
What type of materials can eddy current only be used on
Conductive materials only
What is ultrasound used for
Below surface flaws in all solid material
How does ultrasound work
Uses a transducer to convert sound energy into electrical energy to produce a picture
What is a fibroscope
Flexible and produces cold light
What are the benefits of FPVVA
Flexible probe video visual aid
- Flexible
- You can take pictures
- Reduces eye strain
- Stronger light source
What must be done after using the magnetic flaw detection process of NDT
Must de magnetise component afterwards
Is weight distribution more critical in small or large aircraft
Small
In a small aircraft if the pilot is flying solo how does he know where to sit in relation to weight and balance
There should be a placard on the instrument panel
What is the aircraft max weight
The ac itself, pax, baggage, fuel
What is basic weight Empty
Complete aircraft with all closed system fluids but no fuel
What is disposable load
Pax, baggage, fuel
What is payload
Pax bags freight
What must be done to aircraft with less than 10 pax and helicopters with les than 6 pax
Must employ weight and balance
Aircraft with how many pax and above have standards weight amounts for pax
20 pax
88kg for male 70kg for female
On swept wing and large aircraft how is the centre of gravity determined
% of mean aerodynamic chord
What can effect MATOM and MALM
Environmental conditions
If an aircraft gets stuck in soft ground how would you get it out
With a towing arm and bridle
What is the max towing speed for an aircraft with doors locked or been removed with a tow bar
25kph
What’s the max tow speed with doors open but with tow bar
10kph
What’s the max tow speed with out tow bar
32kph
If parking an aircraft but not for more than 12 weeks what is vital that must be done
- Fill fuel tanks to at least 90% to prevent Gladys
- Water drains 1 hour after fuelling
Can turbine engines run on avgas
Yes
Can piston engines run on jet fuel
No
When fuelling how far away should the no smoking zone be
15m
How far should the fuelling zone be when fuelling
6m
What is Deicing
Removing ice or frost
What is Anti icing
Preventative measure
What is a cold soaked condition
- If OAT is less than 0°
- No ground power
- No air con
What is holdover time
- Starts as soon as spraying starts
- Affected by OAT
- Severity of weather
- Type of fluid
Out of type 1,2 and 4 which fluid is Newtonian
Type 1
What fluids are non Newtonian
2 and 4
What is the worst kind of ice
Glaze ice
What does Glaze ice look like
Glassy deposit
