TD 91

Question 1

ENG OIL P caution

Answer 1

Engine oil pressure - Check
OEI flight condition- Establish
Affected engine - Identify
SEES - Perform
Land as soon as practicable

Question 2

FUEL FILT caution

Answer 2

One caution:
- Land as soon as practicable
- be prepared for single engine failure

Both cautions:
- Land as soon as possible
- be prepared for double engine failure

Question 3

Land immediately

Answer 3

The urgency of landing is paramount. Primary consideration is survival of the occupants. Landing in water, trees or other unsafe areas should only be considered as last resort.

Question 4

Land ASAP

Answer 4

Land without delay at the nearest adequate site where a safe approach and landing can be made.

Question 5

Land as soon as practicable

Answer 5

Landing site and duration of flight are at the discretion of the pilot. Extended flight beyond the closest approved landing area where appropriate assistance can be expected is not recommended.

Question 6

Single engine failure HOGE

Answer 6

Collective lever - Adjust as necessary to maintain NRO
Airspeed - Increase if possible

Forced landing:
Landing attitude - Establish
Collective lever - Raise as necessary to stop descent and cushion landing

After landing:
Affected engine - Identify
SEES - Perform

Transition to OEI-Flight:
Collective lever - Adjust to OEI limits or below
Rotor speed - Trim to max
Airspeed - Gain 65 KIAS

After reaching safe altitude:
Collective lever - Adjust to OEI MCP or below
Affected Engine - Identify
SEES - Perform

Land as soon as practicable

Question 7

Engine Overspeed

Answer 7

Collective lever - Raise as necessary to maintain N2 & NRO within limits
VAR NR system NORM/MAN sw - Check MAN
N2 trim sw - Try to trim NRO to 101% with torques matching

If step 3 is not possible:
Affected engine- Identify
Twist grip (affected engine) - Rotate towards IDLE until NRO and N2 stabilize in normal range and FLI needles match

Land as soon as practicable

Question 8

Autorotation

Answer 8

Collective lever - Lower to maintain NRO within limits
Airspeed - 75 KIAS recommended
Double engine emergency shutdown - Perform

At approx. 100´ AGL:
Flare attitude- Establish (approx 15 - 20 deg) to reduce forward speed and rate of descent; control NRO

At approx. 8 - 12´ AGL:
Flare attitude - Reduce to approx. 7 deg
Heading - Maintain
Collective lever - Raise to stop descent and cushion landing
BAT MSTR sw - OFF

Question 9

Tail Rotor Failure

Answer 9

Collective lever - Reduce to obtain minimum sideslip angle
Airspeed - Maintain 70 KIAS or higher
Shallow approach with nose left - Perform

If airspeed can be reduced to 40 kts with nose left:
Airspeed - Reduce close to the ground until nose is aligned with flight direction
Landing - Perform

If nose direction changes to right above 40 kts:
Airspeed - Increase
Approach - Abort, climb to sufficient height for autorotation
Autorotation - Perform