B737 crew had flap damage. Maintenance suspected it was caused by aircraft overspd.

Attributes
ACN	565255
Time
Date	200211
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : slc.airport
State Reference	UT
Altitude	agl single value : 2000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : s56.tracon
Operator	common carrier : air carrier
Make Model Name	B737 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	descent : approach
Route In Use	approach : visual
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 125 flight time total : 8000 flight time type : 524
ASRS Report	565255
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	aircraft equipment problem : critical non adherence : company policies non adherence : far non adherence : published procedure other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : detected after the fact
Consequence	other other other
Supplementary
Problem Areas	Flight Crew Human Performance Aircraft
Primary Problem	Flight Crew Human Performance

Narrative:

We were flying a visual hand flown approach to runway 16L in salt lake city. I was flying and called for the copilot to deploy the flaps at the appropriate speeds. When the flaps extended between flaps 5 degrees and 10 degrees, we noticed it required left aileron to hold wings level. This aileron requirement remained about the same at flaps 30 degrees. The airplane was easily ctlable through a normal landing. Because we had noticed a right roll tendency with flaps extended, we made a logbook write-up. We made a visual inspection of the flaps before leaving the aircraft and saw nothing unusual. We were later notified of flap damage to our aircraft. Maintenance felt the damage was due to a gross flap overspd. All flap indications and extended speeds were normal during our flight. The fdr is being read and the damage is still under investigation.

Original NASA ASRS Text

Title: B737 CREW HAD FLAP DAMAGE. MAINT SUSPECTED IT WAS CAUSED BY ACFT OVERSPD.

Narrative: WE WERE FLYING A VISUAL HAND FLOWN APCH TO RWY 16L IN SALT LAKE CITY. I WAS FLYING AND CALLED FOR THE COPLT TO DEPLOY THE FLAPS AT THE APPROPRIATE SPDS. WHEN THE FLAPS EXTENDED BTWN FLAPS 5 DEGS AND 10 DEGS, WE NOTICED IT REQUIRED L AILERON TO HOLD WINGS LEVEL. THIS AILERON REQUIREMENT REMAINED ABOUT THE SAME AT FLAPS 30 DEGS. THE AIRPLANE WAS EASILY CTLABLE THROUGH A NORMAL LNDG. BECAUSE WE HAD NOTICED A R ROLL TENDENCY WITH FLAPS EXTENDED, WE MADE A LOGBOOK WRITE-UP. WE MADE A VISUAL INSPECTION OF THE FLAPS BEFORE LEAVING THE ACFT AND SAW NOTHING UNUSUAL. WE WERE LATER NOTIFIED OF FLAP DAMAGE TO OUR ACFT. MAINT FELT THE DAMAGE WAS DUE TO A GROSS FLAP OVERSPD. ALL FLAP INDICATIONS AND EXTENDED SPDS WERE NORMAL DURING OUR FLT. THE FDR IS BEING READ AND THE DAMAGE IS STILL UNDER INVESTIGATION.

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.