ALTITUDE ALERTER

Functions

- Due to the high rate of climb of aircraft and potential for altitude busts....

- Anticipate level out

- Helps set assigned altitude

- Required for IFR

- Audio and visual warnings as the set altitude is approached

Operation, Interpretation & Monitoring

Warnings are based on vertical speed as determined by ADC/RADALT. The following are typical alerts:

1000 ft to go, Alt black text (ALT ALERT) - Flashes for 5 seconds - aural tone

200 ft to go, Alt blue text (ALT ALERT)- Flashes for 5 seconds

Deviation of 200 ft, Master Caution, Yellow text (ALT ALERT) - Flashes for 5 seconds - aural tone

ALTITUDES

- Selected Altitude - Altitude selected on the Auto Pilot, normally as assigned by ATC

- Actual Altitude- Altitude of the Aircraft

- Aircraft may not complete climb/descent before being assigned a new Altitude.

Regulatory Requirements

- An Altitude Alerter is mandatory on all turbofan powered aircraft (CAR Part 91.543) and for a flight within Reduced Vertical Separation Minima Airspace, typically controlled space above FL290

- NZ CAR Part 91.519(e) requires that aircraft first issued with a Type Certificate after 31 Dec 1996 must have an aural and visual warning when deviation of 200ft occurs from the selected flight level.