Close proximity commuter light transport on takeoff and GA small aircraft making a go around.

Attributes
ACN	149385
Time
Date	199006
Day	Tue
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : sts
State Reference	CA
Altitude	agl bound lower : 0 agl bound upper : 1000
Environment
Flight Conditions	VMC
Light	Dusk
Aircraft 1
Make Model Name	Small Aircraft, High Wing, 1 Eng, Fixed Gear
Flight Phase	other
Route In Use	approach : visual
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Light Transport, High Wing, 2 Turboprop Eng
Flight Phase	climbout : takeoff ground : holding
Person 1
Affiliation	Other
Function	observation : observer
Qualification	pilot : student pilot : private
Experience	flight time total : 50
ASRS Report	149385
Person 2
Affiliation	Other
Function	flight crew : single pilot
Events
Anomaly	conflict : nmac
Independent Detector	other other : unspecified
Resolutory Action	none taken : unable
Consequence	Other
Miss Distance	horizontal : 400 vertical : 200
Supplementary
Primary Problem	Flight Crew Human Performance
Situations
ATC Facility	other physical facility

Narrative:

I was standing on the deck of an airport facility and was tuned into the 135 KW frequency since the control tower closed approximately 15-20 mins before. A light high winged aircraft was left downwind of sonoma county airport (I believe the call letters, we xray something or other) the pilot was calling out his legs beautifully and by the numbers. He announced left downwind, turning right base and as he was turning for final for runway 14 (a) commuter aircraft maneuvered into position and announced it was ready for takeoff. The pilot of the light (he had an eastern us accent) plane started trying to communication to the commuter that he was landing with still no response. So in complete frustration the light plane announced that since no response it would go around. At about the point that the light plane was over the commuter at runway 14, the commuter takes of and up going into and in front of the light plane. The light plane pilot was rightfully angry and started asking other pilots in the air if saw what happened (he was yelling at the commuter). I doubt if the commuter plane ever saw the light plane and certainly they weren't (or couldn't be) on the same frequency. When I discussed this with various flight personnel and instructors they said it happens all the time and when the tower shuts down its a free for all. With the commercial pilots not giving a tinkers damn, this was a major disaster waiting to happen.

Original NASA ASRS Text

Title: CLOSE PROX COMMUTER LTT ON TKOF AND GA SMA MAKING A GO AROUND.

Narrative: I WAS STANDING ON THE DECK OF AN ARPT FAC AND WAS TUNED INTO THE 135 KW FREQ SINCE THE CTL TWR CLOSED APPROX 15-20 MINS BEFORE. A LIGHT HIGH WINGED ACFT WAS L DOWNWIND OF SONOMA COUNTY ARPT (I BELIEVE THE CALL LETTERS, WE XRAY SOMETHING OR OTHER) THE PLT WAS CALLING OUT HIS LEGS BEAUTIFULLY AND BY THE NUMBERS. HE ANNOUNCED L DOWNWIND, TURNING R BASE AND AS HE WAS TURNING FOR FINAL FOR RWY 14 (A) COMMUTER ACFT MANEUVERED INTO POS AND ANNOUNCED IT WAS READY FOR TKOF. THE PLT OF THE LIGHT (HE HAD AN EASTERN US ACCENT) PLANE STARTED TRYING TO COM TO THE COMMUTER THAT HE WAS LNDG WITH STILL NO RESPONSE. SO IN COMPLETE FRUSTRATION THE LIGHT PLANE ANNOUNCED THAT SINCE NO RESPONSE IT WOULD GO AROUND. AT ABOUT THE POINT THAT THE LIGHT PLANE WAS OVER THE COMMUTER AT RWY 14, THE COMMUTER TAKES OF AND UP GOING INTO AND IN FRONT OF THE LIGHT PLANE. THE LIGHT PLANE PLT WAS RIGHTFULLY ANGRY AND STARTED ASKING OTHER PLTS IN THE AIR IF SAW WHAT HAPPENED (HE WAS YELLING AT THE COMMUTER). I DOUBT IF THE COMMUTER PLANE EVER SAW THE LIGHT PLANE AND CERTAINLY THEY WEREN'T (OR COULDN'T BE) ON THE SAME FREQ. WHEN I DISCUSSED THIS WITH VARIOUS FLT PERSONNEL AND INSTRUCTORS THEY SAID IT HAPPENS ALL THE TIME AND WHEN THE TWR SHUTS DOWN ITS A FREE FOR ALL. WITH THE COMMERCIAL PLTS NOT GIVING A TINKERS DAMN, THIS WAS A MAJOR DISASTER WAITING TO HAPPEN.

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.