FAA Order 2150.3a, Compliance and Enforcement Program, in section
"Compliance/Enforcement Bulletin 86-1," says

"ACTION: Until further notice, a computer detected altitude deviation of 500
feet or less, where no near midair collision resulted, should normally be
addressed by means of administrative action, unless a prior altitude
deviation occurred within 2 years of the date of the subject altitude
deviation or other aggravating circumstances require initiation of legal
enforcement action. In determining whether a violation is "aggravated," all
circumstances surrounding the incident (e.g., whether the deviation was
deliberate or inadvertent, the hazard to safety, etc.) shall be considered."

In searching my Summit Aviation CD-ROM, I found the figure "300 feet" only
in reference to oceanic airspace and RSVM (Reduced Vertical Separation
Minimum), which applies above flight level 290.

Bob Gardner


"Magnus" wrote in message
...
I thought it was +/- 200 feet before you've violated if you are flying
IFR, but someone just told me it's a 100 feet, which seems a little
steep considering they use 1000 feet separations.