|37000 Feet||Browse and search NASA's
Aviation Safety Reporting System
|Local Time Of Day||1201 To 1800|
|Locale Reference||atc facility : rnt|
|Altitude||msl bound lower : 1700|
msl bound upper : 1700
|Controlling Facilities||tower : rnt|
|Operator||general aviation : personal|
|Make Model Name||Any Unknown or Unlisted Aircraft Manufacturer|
|Operating Under FAR Part||Part 91|
|Flight Phase||cruise other|
|Function||flight crew : single pilot|
|Qualification||pilot : private|
|Function||observation : passenger|
|Qualification||pilot : cfi|
pilot : commercial
pilot : instrument
|Experience||flight time last 90 days : 23|
flight time total : 1000
flight time type : 15
|Anomaly||non adherence : far|
other anomaly other
|Independent Detector||other flight crewa|
|Resolutory Action||none taken : detected after the fact|
|Primary Problem||Flight Crew Human Performance|
|Air Traffic Incident||Pilot Deviation|
|Airport||other physical facility|
While sebound in cruise, I determined that I was clear of rnt class D airspace. I monitored rnt tower for traffic awareness. Radio traffic was for 2 helicopters inbound to rnt air traffic area. I acquired 1 at 1 mi and 50-100 ft lower northbound. Did not acquire wbound traffic at 1000 ft. Later, closer examination of terminal area charts determined I may have clipped the east boundary of the rnt class D airspace. The difficulty of exact determination arises from the lack of reliable ground landmarks in rising terrain (which hill is at the edge?) and range estimates from airport by slant angles are unreliable with varying terrain hts. Airspace boundaries especially VFR related) that match reliable ground landmarks would mitigate this uncertainty.
Original NASA ASRS Text
Title: POSSIBLE INCURSION OF CLASS D AIRSPACE.
Narrative: WHILE SEBOUND IN CRUISE, I DETERMINED THAT I WAS CLR OF RNT CLASS D AIRSPACE. I MONITORED RNT TWR FOR TFC AWARENESS. RADIO TFC WAS FOR 2 HELIS INBOUND TO RNT ATA. I ACQUIRED 1 AT 1 MI AND 50-100 FT LOWER NBOUND. DID NOT ACQUIRE WBOUND TFC AT 1000 FT. LATER, CLOSER EXAMINATION OF TERMINAL AREA CHARTS DETERMINED I MAY HAVE CLIPPED THE E BOUNDARY OF THE RNT CLASS D AIRSPACE. THE DIFFICULTY OF EXACT DETERMINATION ARISES FROM THE LACK OF RELIABLE GND LANDMARKS IN RISING TERRAIN (WHICH HILL IS AT THE EDGE?) AND RANGE ESTIMATES FROM ARPT BY SLANT ANGLES ARE UNRELIABLE WITH VARYING TERRAIN HTS. AIRSPACE BOUNDARIES ESPECIALLY VFR RELATED) THAT MATCH RELIABLE GND LANDMARKS WOULD MITIGATE THIS UNCERTAINTY.
Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.