Maintenance Practices M7.7 Flashcards
Why should you never use electric tools in fuel tanks
Risk of explosion
Where are plastic cable ties not allowed
Unpressurised areas
What is the minimum bend radius for single wires
3 times outside diameter
What is the minimum bend radius for wire bundles
6 times diameter
What is the smallest bend radius for coax cables
10x diameter
What must be done to wire bundles in fuselage or wing areas
They must be clamped on every frame
What wire bundles must be identified with a W
An over braid shield
Rubber fillers can be used to improve the fit of a clamp but why type of cables can they not be used with
Coax
What must aromatic polymide wires be wrapped with before clamping
Insulation tape
When fitting a clamp how should the clamp sit in relation the wire bundle
The clamp should be above the wire bundle
When adding a new wire to a bundle how should it sit
External to the existing ties but in the same clamps
What should not be used in fuel tanks
Cable ties
What is the lacing tie called on wires
Clove hitch and square knot
When should plastic wire ties not be used
- Wire bundles larger than 10 awg
- Unpressurised areas
- Coax cables
- Areas of high vibration
- Fly by wire cables
- Temps greater than 85°
On repairs what grade tape is used in high temp areas
Grade D
