TD 6

Question 1

WHAT IS THE DIFFERENCE BETWEEN AN OROCA AND A MOCA?

Answer 1

OROCA: Offroute Obstruction Clearance Altitudeprovide 1,000 foot (2,000 foot in mountainous terrain) obstacle clearance but do not guarantee any reception capabilities.
MOCA: Minimum Obstruction Clearance Altitude is the lowest published altitude along an established route which meets obstacle clearance requirements for the entire route and guarantees navigation signal coverage only within 22 NM of a VOR
GP 2-30

Question 2

WHAT DOES THE MEA PROVIDE?

Answer 2

Minimum Enroute Altitude is the lowest published altitude between fixes which assures acceptable navigational signal coverage and obstacle clearance between fixes.
3-04.5 pg.4-5

Question 3

WHILE FLYING IMC, WHAT IS THE EMERGENCY PROCEDURE FOR # GEN 1 AND # GEN 2 FAIL?

Answer 3

APU-Start
APU GEN switch - ON

A/S-Below 100 KCAS or VNE, whichever is slower
Altitude-Below 6,000 feet PA
AFCS-off
PDPs-Check circuit breakers and place gang bars down
Each GEN switch-OFF/RESET, then ON

urgency to land: as sson as possible

considerations: load shedding may be necessary
Electrical load-Reduceas required
Turn off or pull circuit breakers of non-essential circuits
EAPS ENG1 & ENG2 FAN switches-OFF as required
ANTI-ice-OFF as required
Searchlights-OFF as required

-10 pg.9-37

Question 4

AS AN ARMY AVIATOR FLYING A CH-47F, WHAT ARE YOUR ALTITUDE REQUIREMENTS FOR USING OXYGEN?

Answer 4

(a) On flights above 10,000 feet pressure altitude for more than 1 hour.
(b) On flights above 12,000 feet pressure altitude for more than 30 minutes.
(2) Aircraft crews and all other occupants.
(a) On flights above 14,000 feet pressure altitude for any period of time.
(b) For flights above 18,000 feet pressure altitude, oxygen prebreathing will be accomplished by aircrew members.
AR 95-1 pg.48