Alternate Requirements

Question 1

Alternates

AIDS

Answer 1

RPT & Charter

Must provide for a suitable alternate aerodrome unless either:

1. The destination aerodrome has a radio navigation aid for which an approach has been prescribed and the aircraft is fitted with two independent and separate radio navigation systems capable of using the aid OR
2. The destination is served by 2 radio navigation aids for independent and seperate instrument approach procedures have been prescribed and the aircraft is fitted with independent and seperate radio navigation systems capable of using these aids.

Question 2

Could

CLOUDS

Answer 2

More than scattered below the alternate minima

Question 3

Very

VISIBILITY

Answer 3

Less than the alternate minimum OR
Greater than the alternate minimum BUT the forecast is endorsed with a percentage probability of FOG, MIST, DUST or any other phenomenon restricting the visibility below the alternate minimum.

Question 4

Well

WIND

Answer 4

A CROSSWIND or TAILWIND component greater than the maximum for aircraft

Saab 340:
CROSSWIND = 35 knots
TAILWIND = 10 knots

*note: gusts must be considered

Question 5

Prove

PROV and PROB

Answer 5

PROV: When an aerodrome forecast is not available or is endorsed as “provisional” the crew must plan a suitable alternate that has a firm forecast.

PROB: When a TAF has been endorsed with a probability of conditions being below the alternate minima, an alternate must be planned for.

Question 6

Life

LIGHTING

Answer 6

When aerodrome lighting is required and PAL is not being used, the pilot in command or operator must ensure that arrangements have been made for the lighting to be operating during the following periods:

DEPARTURE: at least 10 mins prior to departure to at least 30 mins after to takeoff.

ARRIVAL: at least 30 mins before ETA to the time landing and taxiing has been completed.

PORTABLE LIGHTING: when a flight is planned to an aerodrome that has portable lighting an alternate must be planned unless arrangements have been made for a responsible person to be in attendance during the time specified in AIP ENR 1.1 PARA 11.8.3.1 / JEPP ATC Airports and ground Aids 2.3

IF NO STBY POWER AVAILABLE: when a flight is planned to land at an aerodrome with no standby power for PAL or otherwise the flight must plan an alternate unless a responsible person is in attendance during the period specified in (AIP ENR 1.1 PARA 11.8.3.1 / JEPP ATC Airports and ground Aids 2.3) to display portable lighting in the event of a power failure.
The alternate aerodrome nominated need not have standby power OR standby portable lighting.

PILOT ACTIVATED LIGHTING: when a flight is planned to an aerodrome with PAL and STBY PWR an alternate must be planned unless a responsible person is in attendance to manually switch on the aerodrome lighting.
The alternate aerodrome need not have standby power or standby portable lighting.

LIGHTING SYSTEMS FOR ALTERNATE AERODROMES for RPT: the alternate aerodrome must be one which is -

a. Served by a lighting system which is not PAL; or
b. Served by PAL and there is a responsible person in attendance to manually switch on the lighting.

Question 7

Savers

STORMS

Answer 7

When thunderstorms or their associated severe turbulence or their probability is forecast at the destination sufficient fuel must be carried for the aircraft to proceed to a suitable alternate aerodrome or to hold for:
TEMPO = 60 mins
INTER = 30 mins