|37000 Feet||Browse and search NASA's
Aviation Safety Reporting System
|Local Time Of Day||1201 To 1800|
|Locale Reference||atc facility : day|
|Altitude||msl bound lower : 1800|
msl bound upper : 3200
|Controlling Facilities||tower : ffo|
|Operator||common carrier : air taxi|
|Make Model Name||Small Aircraft, Low Wing, 1 Eng, Retractable Gear|
|Flight Phase||cruise other|
|Function||flight crew : single pilot|
|Qualification||pilot : cfi|
pilot : atp
|Experience||flight time last 90 days : 150|
flight time total : 7500
flight time type : 200
|Function||controller : local|
|Qualification||controller : non radar|
|Anomaly||other anomaly other|
|Air Traffic Incident||other|
LORAN C direct flight from cmh to bmg passing through air traffic area's of sph and ffo in south westerly direction. Altitude varying between 3000' MSL and 3200' MSL due to light turbulence. Called sph for air traffic area passage. After release from sph called ffo at 'X' on chart excerpt. Ffo requested report of altitude and departure from area. I reported 3200' MSL, later reported at 'O' southwest of wright AFB. Ffo closed communication by authorizing change of frequency. LORAN track indicated by solid black line. Path of flight indicated by black dashed line adjacent to it. Having reported clear of the air traffic area I suddenly realized I was in immediate danger of entering day-arsa due to altitude. I am convinced of not penetrating the arsa because at no time did I proceed north of a line from the 'X' to the 2079' towers inside the box. Having realized possible incursion into the arsa, I diverted left as shown by the dashed line, well to the left of the tall towers and descended to 1800' MSL. (Descent for less headwind and having passed the day populated area.) suppose I had been elsewhere in the ffo-air traffic area and been released immediately into the day arsa? Given the dimensions of the arsa, who has jurisdiction where the ffo air traffic area and day arsa overlap? Air traffic area goes to 3824' MSL, arsa begins at 2400' MSL. Above 2400' MSL, does ffo tower still supervise the air traffic area in the area of overlap? The controller and ffo could have perceived the possible danger of entry into the arsa and issued a cautionary remark to remain clear of the arsa. Such is the case, for instance, on a continual basis at louisville bowman ATC tower. Pilots are constantly instructed to remain clear of the sdf arsa. Aside from the fact that the PIC is responsible for the conduct of his aircraft regardless of ATC influence, and my immediate scenario notwithstanding, there is room to question whether any clarifying comments should have been issued by the local controller. Certainly a caution about the altitude would have been helpful to raise my awareness of the situation. I have flown previously the same route at less than 2400' MSL with no problem. As a flight instrument, I also would like to know what the status for operation in the northwest hemisphere of the ffo air traffic area would be under similar circumstances. Some sore of chart notation should be devised to indicate better the layers of supervision in the case I have described. See the arsa TCA notation for mdw and ord. Due to the positive control aspect of the ord TCA, mdw arsa has ceilings notated as the base of the TCA rather than the standard 4000' AGL. Nowhere have I seen described or notated where an air traffic area stops at the base of an arsa. Callback conversation with reporter revealed the following: discussed with the reporter reference his question when an air traffic area lies within the confines of an arsa. Generally an agreement between the controling facs where their jurisdiction begins and ends and in most cases the air traffic area will end at the base of the arsa. Reporter is a flight instrument and wanted the information for his classes. Advised he should emphasize, if in doubt, to call the facility controling the arsa prior to penetration.
Original NASA ASRS Text
Title: POSSIBLE PENETRATOIN OF ARSA.
Narrative: LORAN C DIRECT FLT FROM CMH TO BMG PASSING THROUGH ATA'S OF SPH AND FFO IN S WESTERLY DIRECTION. ALT VARYING BTWN 3000' MSL AND 3200' MSL DUE TO LIGHT TURB. CALLED SPH FOR ATA PASSAGE. AFTER RELEASE FROM SPH CALLED FFO AT 'X' ON CHART EXCERPT. FFO REQUESTED RPT OF ALT AND DEP FROM AREA. I RPTED 3200' MSL, LATER RPTED AT 'O' SW OF WRIGHT AFB. FFO CLOSED COM BY AUTHORIZING CHANGE OF FREQ. LORAN TRACK INDICATED BY SOLID BLACK LINE. PATH OF FLT INDICATED BY BLACK DASHED LINE ADJACENT TO IT. HAVING RPTED CLR OF THE ATA I SUDDENLY REALIZED I WAS IN IMMEDIATE DANGER OF ENTERING DAY-ARSA DUE TO ALT. I AM CONVINCED OF NOT PENETRATING THE ARSA BECAUSE AT NO TIME DID I PROCEED N OF A LINE FROM THE 'X' TO THE 2079' TWRS INSIDE THE BOX. HAVING REALIZED POSSIBLE INCURSION INTO THE ARSA, I DIVERTED LEFT AS SHOWN BY THE DASHED LINE, WELL TO THE LEFT OF THE TALL TWRS AND DSNDED TO 1800' MSL. (DSCNT FOR LESS HEADWIND AND HAVING PASSED THE DAY POPULATED AREA.) SUPPOSE I HAD BEEN ELSEWHERE IN THE FFO-ATA AND BEEN RELEASED IMMEDIATELY INTO THE DAY ARSA? GIVEN THE DIMENSIONS OF THE ARSA, WHO HAS JURISDICTION WHERE THE FFO ATA AND DAY ARSA OVERLAP? ATA GOES TO 3824' MSL, ARSA BEGINS AT 2400' MSL. ABOVE 2400' MSL, DOES FFO TWR STILL SUPERVISE THE ATA IN THE AREA OF OVERLAP? THE CTLR AND FFO COULD HAVE PERCEIVED THE POSSIBLE DANGER OF ENTRY INTO THE ARSA AND ISSUED A CAUTIONARY REMARK TO REMAIN CLR OF THE ARSA. SUCH IS THE CASE, FOR INSTANCE, ON A CONTINUAL BASIS AT LOUISVILLE BOWMAN ATC TWR. PLTS ARE CONSTANTLY INSTRUCTED TO REMAIN CLR OF THE SDF ARSA. ASIDE FROM THE FACT THAT THE PIC IS RESPONSIBLE FOR THE CONDUCT OF HIS ACFT REGARDLESS OF ATC INFLUENCE, AND MY IMMEDIATE SCENARIO NOTWITHSTANDING, THERE IS ROOM TO QUESTION WHETHER ANY CLARIFYING COMMENTS SHOULD HAVE BEEN ISSUED BY THE LCL CTLR. CERTAINLY A CAUTION ABOUT THE ALT WOULD HAVE BEEN HELPFUL TO RAISE MY AWARENESS OF THE SITUATION. I HAVE FLOWN PREVIOUSLY THE SAME ROUTE AT LESS THAN 2400' MSL WITH NO PROB. AS A FLT INSTR, I ALSO WOULD LIKE TO KNOW WHAT THE STATUS FOR OPERATION IN THE NW HEMISPHERE OF THE FFO ATA WOULD BE UNDER SIMILAR CIRCUMSTANCES. SOME SORE OF CHART NOTATION SHOULD BE DEVISED TO INDICATE BETTER THE LAYERS OF SUPERVISION IN THE CASE I HAVE DESCRIBED. SEE THE ARSA TCA NOTATION FOR MDW AND ORD. DUE TO THE POSITIVE CTL ASPECT OF THE ORD TCA, MDW ARSA HAS CEILINGS NOTATED AS THE BASE OF THE TCA RATHER THAN THE STANDARD 4000' AGL. NOWHERE HAVE I SEEN DESCRIBED OR NOTATED WHERE AN ATA STOPS AT THE BASE OF AN ARSA. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING: DISCUSSED WITH THE RPTR REF HIS QUESTION WHEN AN ATA LIES WITHIN THE CONFINES OF AN ARSA. GENERALLY AN AGREEMENT BTWN THE CTLING FACS WHERE THEIR JURISDICTION BEGINS AND ENDS AND IN MOST CASES THE ATA WILL END AT THE BASE OF THE ARSA. RPTR IS A FLT INSTR AND WANTED THE INFO FOR HIS CLASSES. ADVISED HE SHOULD EMPHASIZE, IF IN DOUBT, TO CALL THE FAC CTLING THE ARSA PRIOR TO PENETRATION.
Data retrieved from NASA's ASRS site as of August 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.