A PA23-250 pilot has an near midair collision with a departure cessna citation at gas, oh.

Attributes
ACN	411842
Time
Date	199808
Day	Fri
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : gas
State Reference	OH
Altitude	msl bound lower : 1600 msl bound upper : 1600
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : personal
Make Model Name	PA-23-250 Aztec
Operating Under FAR Part	Part 91
Flight Phase	descent : approach descent other other
Route In Use	approach : visual
Flight Plan	None
Aircraft 2
Make Model Name	Cessna Citation Undifferentiated or Other Model
Operating Under FAR Part	Part 91
Flight Phase	climbout : takeoff climbout : initial
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : cfi
Experience	flight time last 90 days : 15 flight time total : 2000 flight time type : 700
ASRS Report	411842
Person 2
Affiliation	Other
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	conflict : nmac non adherence : far non adherence : published procedure other spatial deviation
Independent Detector	other flight crewa
Resolutory Action	none taken : insufficient time
Consequence	Other
Miss Distance	horizontal : 500

Narrative:

On descent to landing to gas, there was a C172 flying traffic patterns. The C172 was on crosswind when I entered behind him, crossing the end of the airfield. Since the airfield lies in a valley, I did not have a good view of the runway until I was very close to it. I did not hear a cessna citation announce his takeoff and as a result there was a near miss on the extended centerline of the runway. I was trying to slow down and enter the traffic pattern behind the C172. The pilot of the citation should have announced his takeoff and I should have viewed the runway more cautiously.

Original NASA ASRS Text

Title: A PA23-250 PLT HAS AN NMAC WITH A DEP CESSNA CITATION AT GAS, OH.

Narrative: ON DSCNT TO LNDG TO GAS, THERE WAS A C172 FLYING TFC PATTERNS. THE C172 WAS ON XWIND WHEN I ENTERED BEHIND HIM, XING THE END OF THE AIRFIELD. SINCE THE AIRFIELD LIES IN A VALLEY, I DID NOT HAVE A GOOD VIEW OF THE RWY UNTIL I WAS VERY CLOSE TO IT. I DID NOT HEAR A CESSNA CITATION ANNOUNCE HIS TKOF AND AS A RESULT THERE WAS A NEAR MISS ON THE EXTENDED CTRLINE OF THE RWY. I WAS TRYING TO SLOW DOWN AND ENTER THE TFC PATTERN BEHIND THE C172. THE PLT OF THE CITATION SHOULD HAVE ANNOUNCED HIS TKOF AND I SHOULD HAVE VIEWED THE RWY MORE CAUTIOUSLY.

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.