A310-200/300 NAV IRS

IRS

1. EACH IRU HAS 3 GYRO AND 3 ACC 
2. ALIGN FLASH IF ENTERED POS DIFFER FROM LAST POS

3. WHEN IRU WORKS WITH BAT ON GND, BATT OP LIT + HORN

4. IRS SW:

OFF

NAV: IN NOMAL OPERATION HDG , POS AND ATT IS AVAIL

ATT: WHEN POS LOST FROM IRU ONLY HDG AND ATT AVAIL

5. STBY HORIZON SUPP BY 303PP BUT ITS GYRO MOTOR FROM 3PHASE INVERTOR

6. IRU#1 SUPP BY BATT AND 402XP

7. INRTIAL V/S COMPUTES IN IRU

8. IRS FAIL AUTO SW FOR IVS TO BARO V/S IN VSI IF ADC FAIL ALSO MAN SW TO ADC#2