Nonstandard VFR traffic pattern entry causes airborne conflict.

Attributes
ACN	99897
Time
Date	198812
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : 7d2 airport : 3bb
State Reference	MI
Altitude	msl bound lower : 1700 msl bound upper : 2300
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : corporate
Make Model Name	Small Aircraft, High Wing, 1 Eng, Fixed Gear
Flight Phase	other
Flight Plan	None
Aircraft 2
Make Model Name	Small Aircraft, High Wing, 1 Eng, Fixed Gear
Flight Phase	other
Flight Plan	None
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : commercial pilot : instrument
Experience	flight time last 90 days : 41 flight time total : 2500
ASRS Report	99897
Person 2
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : private
Events
Anomaly	conflict : airborne less severe non adherence : published procedure other spatial deviation
Independent Detector	other flight crewa
Resolutory Action	none taken : anomaly accepted
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Small aircraft Y departed chesaning woodside airport 12/tue/88 approximately XA00 pm on a VFR flight to oakland troy airport. Flint and detroit radar was used. Upon arrival at troy I flew a regulation traffic pattern. Small aircraft Y did not enter abeam midpoint or runway when I first spotted small aircraft Y. It did not appear to be in the traffic pattern at troy because of its distance from the airport and flying at higher than pattern altitude. I do believe pilot of small aircraft Y should demonstrate regulation pattern entry procedures to an FAA examiner.

Original NASA ASRS Text

Title: NONSTANDARD VFR TRAFFIC PATTERN ENTRY CAUSES AIRBORNE CONFLICT.

Narrative: SMA Y DEPARTED CHESANING WOODSIDE ARPT 12/TUE/88 APPROX XA00 PM ON A VFR FLT TO OAKLAND TROY ARPT. FLINT AND DETROIT RADAR WAS USED. UPON ARR AT TROY I FLEW A REG TFC PATTERN. SMA Y DID NOT ENTER ABEAM MIDPOINT OR RWY WHEN I FIRST SPOTTED SMA Y. IT DID NOT APPEAR TO BE IN THE TFC PATTERN AT TROY BECAUSE OF ITS DISTANCE FROM THE ARPT AND FLYING AT HIGHER THAN PATTERN ALT. I DO BELIEVE PLT OF SMA Y SHOULD DEMONSTRATE REG PATTERN ENTRY PROCS TO AN FAA EXAMINER.

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.