A landing small aircraft lined up with the parallel runway and conflicted with a landing atx.

Attributes
ACN	121451
Time
Date	198909
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : grr
State Reference	MI
Altitude	msl bound lower : 2500 msl bound upper : 2500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : grr
Operator	general aviation : personal
Make Model Name	Small Aircraft, High Wing, 1 Eng, Fixed Gear
Flight Phase	landing other
Route In Use	approach : straight in
Aircraft 2
Operator	common carrier : air taxi
Make Model Name	Light Transport, Low Wing, 2 Turboprop Eng
Flight Phase	landing other
Route In Use	arrival other
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : approach
Qualification	controller : radar
ASRS Report	121451
Person 2
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : private
Events
Anomaly	conflict : nmac non adherence : far other anomaly other other spatial deviation
Independent Detector	other controllera other flight crewa
Resolutory Action	controller : issued new clearance
Consequence	Other
Miss Distance	horizontal : 0 vertical : 100
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Grr ATC tower is a level 3, radar approach facility. The day of the occurrence the radar was shut down for maintenance, so we were operating as a non-radar approach facility. Small aircraft X reported east of the airport initially, and was told to follow an medium large transport. Small aircraft X was later told to plan straight in to runway 26R, a parallel to the main runway 26L. He acknowledged and reported on final for runway 26R. The air taxi atx Y involved reported on a 5 mi final for runway 26L. A minute later he reported an small aircraft passing directly over him. Small aircraft X emphatically stated he was on final for runway 26R, not in sight by the tower. An small aircraft was spotted by the tower on final for runway 26L, small aircraft X again stated he was on final for runway 26R. I advised small aircraft X to look at the numbers painted on the runway, he said, sorry, I guess I am on final for runway 26L. At this point the crew in atx Y stated they were going to file an incident report.

Original NASA ASRS Text

Title: A LNDG SMA LINED UP WITH THE PARALLEL RWY AND CONFLICTED WITH A LNDG ATX.

Narrative: GRR ATC TWR IS A LEVEL 3, RADAR APCH FAC. THE DAY OF THE OCCURRENCE THE RADAR WAS SHUT DOWN FOR MAINT, SO WE WERE OPERATING AS A NON-RADAR APCH FAC. SMA X REPORTED EAST OF THE ARPT INITIALLY, AND WAS TOLD TO FOLLOW AN MLG. SMA X WAS LATER TOLD TO PLAN STRAIGHT IN TO RWY 26R, A PARALLEL TO THE MAIN RWY 26L. HE ACKNOWLEDGED AND REPORTED ON FINAL FOR RWY 26R. THE AIR TAXI ATX Y INVOLVED REPORTED ON A 5 MI FINAL FOR RWY 26L. A MINUTE LATER HE REPORTED AN SMA PASSING DIRECTLY OVER HIM. SMA X EMPHATICALLY STATED HE WAS ON FINAL FOR RWY 26R, NOT IN SIGHT BY THE TWR. AN SMA WAS SPOTTED BY THE TWR ON FINAL FOR RWY 26L, SMA X AGAIN STATED HE WAS ON FINAL FOR RWY 26R. I ADVISED SMA X TO LOOK AT THE NUMBERS PAINTED ON THE RWY, HE SAID, SORRY, I GUESS I AM ON FINAL FOR RWY 26L. AT THIS POINT THE CREW IN ATX Y STATED THEY WERE GOING TO FILE AN INCIDENT REPORT.

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.