mistarose

Everyone was very helpful when I asked about 121 alternate regs so I thought I would do the same to test my knowledge of 121 rest/duty times. I read a lot of old posts on the subject to help me understand the regulations but just wanted to confirm it with everyone with some examples.

I just had 24 hours of rest, then (for simplicity) showed up to work at 1200.

I fly for 7.5 hours, and don't get off duty until 0000, so 7.5 hours flight and 12 hours on duty. How much rest do I need?

I must have 9 hours of rest.

What time could you could report for duty the following day assuming normal rest?

0000 + 0900 = 0900 the following day.

Could they ask you to report at 0800 the following day?

Yes, but the following rest period would have to be compensatory rest, and in this case it would have to be 10 hours of rest.

What is the latest the 10 hours of compensatory rest could begin in the previous example?

Since the reduced rest began at 0000 on the first day, the 10 hours of compensatory rest could begin no later than 0000 on the 2nd day (no more than 24 hours).



NEW SCENARIO:

Following a weeks vacation...

1200, report for duty with a scheduled block of 12 hours duty, and 9 hours flying.

I end up flying for 9.5 hours and off duty at 0030.

How much normal rest do you need?

-My understanding is that it is the scheduled time that counts - not the actual flight time that you had. So in this case, since you were scheduled for 9 hours, you only need 10 hours (normal rest) as oppose to having to have 11 hours of rest if you were scheduled for more than 9 hours of flight time.

Not sure on that one.

If you find anything wrong or that could be said better please let me know. If you have any additional examples that would increase my understanding I would appreciate it.

cbire880

You can't fly that day. You may not be scheduled for more than 8 hours of flying in any one duty period. Now if you were scheduled for 8 hours and ended up flying 9.5, that's kosher. Legal to start, legal to finish. In that case, you would need to look at the next scheduled block of flying. Look back 24 hours from the completion of each flight segment. Generally, people use the last segment plus 15 minutes for a quick peek, this works unless you have a long leg in the morning plus a long sit. The long sit distorts the look back b/c some of the last day's flying will drop out. APDL does a good job automating this. Figure out what the most flying time was in that 24 hour look back. That dictates the amount of rest you needed to have in that 24 hour period. You add the ACTUAL flying from the day prior to the SCHEDULED flying for the next duty day to figure out if you are legal.

The bottom line, is that the answer depends on what your schedule looks like for the next day. Say you had to report at 1200 and were scheduled for 8 hours of flying with minimal ground time, dutying out at 2100. From the look back, you would roughly see that you had 8 hours scheduled plus whatever you actually flew from 2115 the day prior to 0030 (say it was 2 hours). That gives you 10 hours in your lookback, which requires at least 11 hours of rest (>9 hours) for normal rest.

To sum it up, go to the end of a flight segment. Look back 24 hours, add the scheduled flight time for that segment to the actual time flow in that 24 hour period. That number dictates how much rest you must have had in that previous 24 hours. Now if you go long on the scheduled segment's actual completion, its ok. Legal to start, legal to finish, but you would have to add that time to the next look back's actual numbers.

mistarose

cbire880, thank you very much!

I forgot that you can't be scheduled more than 8 hours between rest periods. And now the 8-9 and 9+ having different rest periods makes complete sense now.

So just for clarification:

I am scheduled for a 12 hour block with 8 hours of flying.

Report for duty at 1200, end up running into a stronger than forecast headwind on the last leg and end up getting 8.5 hours of flying in for the day. I don't get off duty until 0100.

Normal Rest is now 10 hours.

It can be reduced to 9 hours as long as the compensatory 11 hours of rest is started no later than 0100 the following day (24 hours from the start of the reduced rest).

So we I get reduced rest, I report back for duty at 0100 + 9 = 1000 in the morning.

I am scheduled for 7 hours of flying in a 10 hour block this day. So from a planning standpoint, I should look back 24 hours assuming I just got done (10 hours ahead of time).

1000 + 10 = 2000, so at 2000 I look back 24 hours and I have to see the required amount of rest.

On 2000 the previous day I was still on duty, and then at 0100 I got started with my rest and had 9 hours of rest. So I CAN MAKE THIS TRIP since the 24 hour look back had the required amount of rest.

Hope your still with me here...

So I can make the trip, as long as I start my rest before 0100, since the compensatory 11 hours of rest must start no later than when the 9 hour reduced rest started.

The trip goes as planned and I get off duty at 2000, 5 hours before I would have HAD to been back.

Thanks for the help so far, this is just another confirmation to make sure I am understanding the regulation completely.