Small aircraft has near midair collision with commuter light transport.

Attributes
ACN	299682
Time
Date	199503
Day	Sat
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : gll
State Reference	CO
Altitude	msl bound lower : 7500 msl bound upper : 7500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : egtt
Operator	general aviation : personal
Make Model Name	Christen (& Pitts) Undifferentiated or Other Model
Operating Under FAR Part	Part 91
Flight Phase	cruise other
Flight Plan	None
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Beech 1900
Operating Under FAR Part	Part 135
Flight Phase	cruise other
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : atp pilot : cfi
Experience	flight time last 90 days : 30 flight time total : 15000 flight time type : 700
ASRS Report	299682
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	conflict : nmac non adherence : far other anomaly other
Independent Detector	other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 0 vertical : 150
Supplementary
Primary Problem	Flight Crew Human Performance

Narrative:

I was flying my pitts from bjc, jeffco airport, to gxy, weld county airport at 7500 ft, heading northeast. There are blind spots in the pitts at the 10 and 2 O'clock position where the interplane struts attach to the top wing. Because of this limitation I normally rock the wings to visually clear the area. I raised the left wing and saw a commercial beech 1900 800 ft away, level, at my altitude, on a dead collision course heading southeast. I immediately pushed down (about minus 2 G's) looked up and saw the beech pass over me at about 150 ft. There was no indication that anyone on the beech saw me since the airplane kept right on flying level. There is no doubt in my mind that if I had not taken evasive action that we would have hit. From the time I saw the beech and started to push over was no more than 2.5 seconds. I pushed down because I wanted to be able to see the other aircraft as long as I could. I am a firm believer in the see and be seen concept and it works as long as one looks. I also believe that pilot reaction times are faster than we are generally given credit for. Granted the pitts is a very responsive airplane, my reaction time would be the same no matter what aircraft I was flying. I believe that the beech was flying from fnl, fort collins/loveland to den. I am submitting this report at this time because yesterday I read another article on the limitations of the see and be seen concept and pilot reaction times in near miss/midair events. I would hope this incident gets into your data bank as a positive for see and be seen.

Original NASA ASRS Text

Title: SMA HAS NMAC WITH COMMUTER LTT.

Narrative: I WAS FLYING MY PITTS FROM BJC, JEFFCO ARPT, TO GXY, WELD COUNTY ARPT AT 7500 FT, HDG NE. THERE ARE BLIND SPOTS IN THE PITTS AT THE 10 AND 2 O'CLOCK POS WHERE THE INTERPLANE STRUTS ATTACH TO THE TOP WING. BECAUSE OF THIS LIMITATION I NORMALLY ROCK THE WINGS TO VISUALLY CLR THE AREA. I RAISED THE L WING AND SAW A COMMERCIAL BEECH 1900 800 FT AWAY, LEVEL, AT MY ALT, ON A DEAD COLLISION COURSE HDG SE. I IMMEDIATELY PUSHED DOWN (ABOUT MINUS 2 G'S) LOOKED UP AND SAW THE BEECH PASS OVER ME AT ABOUT 150 FT. THERE WAS NO INDICATION THAT ANYONE ON THE BEECH SAW ME SINCE THE AIRPLANE KEPT RIGHT ON FLYING LEVEL. THERE IS NO DOUBT IN MY MIND THAT IF I HAD NOT TAKEN EVASIVE ACTION THAT WE WOULD HAVE HIT. FROM THE TIME I SAW THE BEECH AND STARTED TO PUSH OVER WAS NO MORE THAN 2.5 SECONDS. I PUSHED DOWN BECAUSE I WANTED TO BE ABLE TO SEE THE OTHER ACFT AS LONG AS I COULD. I AM A FIRM BELIEVER IN THE SEE AND BE SEEN CONCEPT AND IT WORKS AS LONG AS ONE LOOKS. I ALSO BELIEVE THAT PLT REACTION TIMES ARE FASTER THAN WE ARE GENERALLY GIVEN CREDIT FOR. GRANTED THE PITTS IS A VERY RESPONSIVE AIRPLANE, MY REACTION TIME WOULD BE THE SAME NO MATTER WHAT ACFT I WAS FLYING. I BELIEVE THAT THE BEECH WAS FLYING FROM FNL, FORT COLLINS/LOVELAND TO DEN. I AM SUBMITTING THIS RPT AT THIS TIME BECAUSE YESTERDAY I READ ANOTHER ARTICLE ON THE LIMITATIONS OF THE SEE AND BE SEEN CONCEPT AND PLT REACTION TIMES IN NEAR MISS/MIDAIR EVENTS. I WOULD HOPE THIS INCIDENT GETS INTO YOUR DATA BANK AS A POSITIVE FOR SEE AND BE SEEN.

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.