A PA28 pilot reports a firm landing that may have resulted in some aircraft damage.

Attributes
ACN	718651
Time
Date	200611
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : cle.airport
State Reference	OH
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : personal
Make Model Name	PA-28 Cherokee/Archer II/Dakota/Pillan/Warrior
Operating Under FAR Part	Part 91
Flight Phase	landing : roll
Route In Use	approach : visual
Flight Plan	IFR
Person 1
Affiliation	other
Function	flight crew : single pilot
Qualification	pilot : multi engine pilot : instrument pilot : flight engineer pilot : commercial pilot : atp
Experience	flight time last 90 days : 210 flight time total : 11500 flight time type : 110
ASRS Report	718651
Events
Anomaly	other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : anomaly accepted
Consequence	other
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance

Narrative:

On landing; I flared high and had a firm touchdown. I realized it was firm; but did not think it was unusually firm. The aircraft taxied normally to customs and the FBO. Passenger deplaned in cle; a walkaround was completed; and everything was noted normal. The aircraft taxied to runway 24L for departure; and normal taxi was noted. Departed cle for bkl. Normal flight; with a smooth ride and touchdown at bkl. Normal taxi to the ramp noted. Aircraft was secured for overnight. About 24 hours later; I was notified that the aircraft appeared to have some stress damage to the left wing; close to the root at the leading and trailing edge. I normally do not fly into cle in small aircraft. However; I have made hundreds of lndgs at cle in B737 aircraft. Perhaps my brain memory was used to the profile flare attitude and environment that I am normally accustomed to in the B737's; and this caused me to flare high and touch down firmly in the piper archer III. To prevent this from occurring again in small aircraft; I feel that I should make an additional affirmative mental note of proper flare attitude prior to touchdown. Also; I recall the aircraft being parked in the shade on the left side of the aircraft. Perhaps during the walkaround this circumstance caused the wing to not show any abnormalities.

Original NASA ASRS Text

Title: A PA28 PLT RPTS A FIRM LNDG THAT MAY HAVE RESULTED IN SOME ACFT DAMAGE.

Narrative: ON LNDG; I FLARED HIGH AND HAD A FIRM TOUCHDOWN. I REALIZED IT WAS FIRM; BUT DID NOT THINK IT WAS UNUSUALLY FIRM. THE ACFT TAXIED NORMALLY TO CUSTOMS AND THE FBO. PAX DEPLANED IN CLE; A WALKAROUND WAS COMPLETED; AND EVERYTHING WAS NOTED NORMAL. THE ACFT TAXIED TO RWY 24L FOR DEP; AND NORMAL TAXI WAS NOTED. DEPARTED CLE FOR BKL. NORMAL FLT; WITH A SMOOTH RIDE AND TOUCHDOWN AT BKL. NORMAL TAXI TO THE RAMP NOTED. ACFT WAS SECURED FOR OVERNIGHT. ABOUT 24 HRS LATER; I WAS NOTIFIED THAT THE ACFT APPEARED TO HAVE SOME STRESS DAMAGE TO THE L WING; CLOSE TO THE ROOT AT THE LEADING AND TRAILING EDGE. I NORMALLY DO NOT FLY INTO CLE IN SMALL ACFT. HOWEVER; I HAVE MADE HUNDREDS OF LNDGS AT CLE IN B737 ACFT. PERHAPS MY BRAIN MEMORY WAS USED TO THE PROFILE FLARE ATTITUDE AND ENVIRONMENT THAT I AM NORMALLY ACCUSTOMED TO IN THE B737'S; AND THIS CAUSED ME TO FLARE HIGH AND TOUCH DOWN FIRMLY IN THE PIPER ARCHER III. TO PREVENT THIS FROM OCCURRING AGAIN IN SMALL ACFT; I FEEL THAT I SHOULD MAKE AN ADDITIONAL AFFIRMATIVE MENTAL NOTE OF PROPER FLARE ATTITUDE PRIOR TO TOUCHDOWN. ALSO; I RECALL THE ACFT BEING PARKED IN THE SHADE ON THE L SIDE OF THE ACFT. PERHAPS DURING THE WALKAROUND THIS CIRCUMSTANCE CAUSED THE WING TO NOT SHOW ANY ABNORMALITIES.

Data retrieved from NASA's ASRS site as of January 2009 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.