Starting Jan 08

ACTUAL CREDIT HOURS (ACH)
ACH is computed at the completion of an assignment.
a. ACH for a duty period is the highest of:
i. MPDP; or
ii. actual block hours; or
iii. actual duty rig.
b. ACH for a trip is the higher of:
i. trip rig as actually flown, plus actual revenue block hours in
excess of 8 in any duty period, plus duty rig for the portion of
any duty period beyond the scheduled on duty limitations; or
ii. the sum of ACH for each duty period.

OVERRIDE SCHEDULED CREDIT (OSC)
OSC for a trip is the higher of:
a. trip rig as scheduled, plus actual revenue block hours in excess of 8 in
any duty period; or
b. The sum of the scheduled credit hour values of the duty periods. The
scheduled credit hour value of each duty period is computed as the
highest of:
i. minimum pay per duty period (MPDP); or
ii. block hours; or
iii. duty rig.

If a trip's ACH exceed OSC or the trip is operationally extended past its original
scheduled return time, a pilot shall earn overage CH computed as the higher of:
a. ACH minus the sum of OSC for the trip and SCH of any subsequent trip(s)
removed with pay due to actual conflict; or
b. trip rig computed for the time the extended trip conflicts with time the pilot
was scheduled to be free from duty at base, if such time exceeds 2 hours.