For instance, I don't remember paragraph 61.51(e)(iii) at all from way back when I studied it to determine when I could log PIC time. I'm fairly certain that it has been added since then (actually, there was no sport pilot license back then so I know that it has at least been changed), but I would like to know when it was changed and what the changes were.
At the bottom of the reg, it includes this:
[Doc. No. 25910, 62 FR 16298, Apr. 4, 1997; Amdt. 61-103, 62 FR 40897, July 30, 1997; Amdt. 61-104, 63 FR 20286, Apr. 23, 1998; Amdt. 61-110, 69 FR 44865, July 27, 2004; Amdt. 61-124, 74 FR 42549, Aug. 21, 2009; Amdt. 61-128, 76 FR 54105, Aug. 31, 2011]
This tells me when it was amended, but not what was amended.
Does the FAA make that information available?
You can find this information with a bit of digging.
Hit up the GPO (Government Printing Office) here: http://www.gpo.gov/fdsys/browse/collectionCfrFR.action?collectionCode=CFRPARTS
Choose the date range you want to look up.
Then choose the Title of the CFR you want (Aviation stuff is Title 14 CFR), and drill down until you find the Part you want, and it will give you some meta data about the change, and then the actual text of the change.
There might be an easier way, but, it is the federal government, so maybe not. :)
To answer your specific question, here is the link: http://www.gpo.gov/fdsys/search/pagedetails.action?browsePath=&granuleId=2011-26229&packageId=FR-2011-10-12&fromBrowse=true (Click on the "Text" link for full details)
Changes to federal aviation regulations are listed on the FAA’s Regulatory & Guidance Library (RGL) at http://rgl.faa.gov/:
Each revision is a link which takes you to the regulation as of that version, with links to the NPRM's and dockets so that you can see what has been changed!
For instance, I don't remember paragraph 61.51(e)(iii) at all from way back when I studied it to determine when I could log PIC time. I'm fairly certain that it has been added since then (actually, there was no sport pilot license back then so I know that it has at least been changed), but I would like to know when it was changed and what the changes were. At the bottom of the reg, it includes... FR 42549, Aug. 21, 2009; Amdt. 61-128, 76 FR 54105, Aug. 31, 2011] This tells me when it was amended, but not what was amended. Does the FAA make that information available?
If an autobrake setting is chosen prior to touchdown, but after touchdown and nosewheel compression (i.e. after the autobrake has engaged) a different setting is required, is it safe to change the setting during the roll-out? What happens when the setting is changed in this manner? I know application of manual brakes disables the autobrake. Does the autobrake immediately match the new deceleration requested?
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What is the policy for ATC towers to notify aircraft the frequency they broadcast and monitor on has changed? How do they do it, if radio isn't available (because they just changed their frequency)?