Narrative:

I had just departed on a maintenance test flight after installation of a new fuel control unit. I had remained in the air traffic area and during an nts check the engine with the new fuel unit was producing approximately 250 pounds more horsepwr in the landing confign than the other engine, calling for a great deal of differential power to maintain directional control. The tower controller had instructed me to follow aircraft Y on left downwind for runway 11. At this time, I was located about mid-downwind for runway 29. The other aircraft landed and cleared the runway. I heard him talking with the tower, when I turned approximately a 4 mi final for runway 29 and completed the approach and landing uneventfully. As I was taxiing to the ramp, the tower requested I call them on the telephone. Upon speaking to the tower operator, I realized I had landed opposite the instructions given. There were no other aircraft in the area at the time other than the other aircraft Y. I feel the factors relating to this incident were the fuel unit problem, also the fact that almost all arrs I have conducted at portland have been on runway 29, I was in a hurry to have the fuel unit problem corrected so the aircraft could be returned to service, and WX at my destination after maintenance was deteriorating. I allowed my attention to focus on the maintenance problem in controling the aircraft to the extent that I failed to pay enough attention to the landing runway instructions.

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Original NASA ASRS Text

Title: WRONG RWY APCH LNDG.

Narrative: I HAD JUST DEPARTED ON A MAINT TEST FLT AFTER INSTALLATION OF A NEW FUEL CTL UNIT. I HAD REMAINED IN THE ATA AND DURING AN NTS CHK THE ENG WITH THE NEW FUEL UNIT WAS PRODUCING APPROX 250 POUNDS MORE HORSEPWR IN THE LNDG CONFIGN THAN THE OTHER ENG, CALLING FOR A GREAT DEAL OF DIFFERENTIAL PWR TO MAINTAIN DIRECTIONAL CTL. THE TWR CTLR HAD INSTRUCTED ME TO FOLLOW ACFT Y ON L DOWNWIND FOR RWY 11. AT THIS TIME, I WAS LOCATED ABOUT MID-DOWNWIND FOR RWY 29. THE OTHER ACFT LANDED AND CLRED THE RWY. I HEARD HIM TALKING WITH THE TWR, WHEN I TURNED APPROX A 4 MI FINAL FOR RWY 29 AND COMPLETED THE APCH AND LNDG UNEVENTFULLY. AS I WAS TAXIING TO THE RAMP, THE TWR REQUESTED I CALL THEM ON THE TELEPHONE. UPON SPEAKING TO THE TWR OPERATOR, I REALIZED I HAD LANDED OPPOSITE THE INSTRUCTIONS GIVEN. THERE WERE NO OTHER ACFT IN THE AREA AT THE TIME OTHER THAN THE OTHER ACFT Y. I FEEL THE FACTORS RELATING TO THIS INCIDENT WERE THE FUEL UNIT PROBLEM, ALSO THE FACT THAT ALMOST ALL ARRS I HAVE CONDUCTED AT PORTLAND HAVE BEEN ON RWY 29, I WAS IN A HURRY TO HAVE THE FUEL UNIT PROBLEM CORRECTED SO THE ACFT COULD BE RETURNED TO SVC, AND WX AT MY DEST AFTER MAINT WAS DETERIORATING. I ALLOWED MY ATTN TO FOCUS ON THE MAINT PROBLEM IN CTLING THE ACFT TO THE EXTENT THAT I FAILED TO PAY ENOUGH ATTN TO THE LNDG RWY INSTRUCTIONS.

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.