TD 28

Question 1

What are the minimum power application and maximum operation Engine Oil Temperature limits?

Answer 1

3 cST and 3.9 cST = -10 degrees C
5 cST = 0 degrees C
maximum = 115 degrees C

Question 2

Engine oil temperature high
Conditions/Indications
Affected engine:
– Oil temperature indication above limits
Procedure
1. OEI flight condition –
2. Affected engine –
3. Twist grip (affected engine) –
(TWIST GRIP caution indication comes on)
4. Oil temperature indicator (affected engine) –
If engine oil temperature decreases below limit:
5. LAND AS SOON AS
If engine oil temperature still remains above limit:
6. Single engine emergency shutdown –
7. LAND AS SOON AS

Answer 2

Engine oil temperature high
Conditions/Indications
Affected engine:
– Oil temperature indication above limits
Procedure
1. OEI flight condition – Establish
2. Affected engine – Identify
3. Twist grip (affected engine) – Adjust to 20–30% torque
(TWIST GRIP caution indication comes on)
4. Oil temperature indicator (affected engine)
– Monitor
If engine oil temperature decreases below limit:
5. LAND AS SOON AS PRACTICABLE
If engine oil temperature still remains above limit:
6. Single engine emergency shutdown – Perform
7. LAND AS SOON AS PRACTICABLE

Question 3

Settling with power is defined as

Answer 3

a condition of powered flight in which the helicopter settles in its own downwash. This condition may also be referred to as vortex ring state.

Question 4

What three conditions must exist simultaneously for settling with power to occur?

Answer 4

A vertical or near-vertical descent of at least 300 feet per minute (FPM). Actual critical rate depends on gross weight, rotor RPM, density altitude, and other pertinent factors.
Slow forward airspeed (less than ETL).
Rotor system must be using 20 to 100 percent of the available engine power with insufficient power remaining to arrest the descent. Low rotor RPM could aggravate this.

Question 5

Name at least three of six flight conditions that are conducive with settling with power

Answer 5

Steep approach at a high rate of descent.
Downwind approach.
Formation flight approach (where settling with power could be caused by turbulence of preceding aircraft).
Hovering above the maximum hover ceiling.
Not maintaining constant altitude control during an OGE hover.
During masking/unmasking.