Hey guys going to sit my ATPLS Air LAW(A) on friday.
just have a pickle with question 7.
RPT aeroplanes with a MTOW greater than 5700kg are required to be equipped with certain flight
instruments. Which combination of instruments is the minimum number which meets the
requirement for provision of HDG information?
• One gyro-magnetic remote indicating compass and one direct reading magnetic compass
• One direct reading magnetic compass and two gyroscopic HDG indicators
• Two direct reading magnetic compass
• Two gyro-magnetic remote indicating compass
• One remote indicating compass and one gyroscopic HDG indicator
Minger's answers suggest
• One remote indicating compass and one gyroscopic HDG indicator
But i need to know why it is not a)
• One gyro-magnetic remote indicating compass and one direct reading magnetic compass.
My understanding of CAO 20.18 APendix II paragraphs 1c, h and 5 are that:
- you need a direct reading magnetic compass,and a DG hdg indicator. or
a remote indicating compass 'AND' standby direct reading magnetic compass 'AND' DG Heading indicator
Para5 suggests that a Heading indicator in 1(h) may be omitted if you have a Gyro-magnetic type fulfilling paragraph 1c (ii)
Note that 1c (ii) requires a remote indicating compass 'AND' a standby direct reading magnetic compass. (if duplicated powersuply) the question doesn't say whether or not we have duplicated Power Sup.
therefore i feel the first answer is more correct because in the case of the last answer, you still additionally require a standyby direct reading magnetic compass.
Someone put me out of my misery.
Regards
Jason Glatzer
Perth WA