Tail Rotor Drive System

Question 1

How is the Intermediate Gearbox (IGB) oil presence sensor inhibited in flight?

Answer 1

By the Weight On Wheels (WOW) relay

Question 2

During routine maintenance, how can the Tail Rotor Gearbox (TRGB) oil level be replenished in the event of minor oil loss?

Answer 2

Via the TRGB oil filler plug

Question 3

What can excessive vibration from incorrect balancing or misalignment of the Tail Rotor Driveshafts (TRDS) cause?

Answer 3

Damage to or failure of the TRDS bearings