An MD10 at final approach fix extended flaps 35 speed less than 170 KTS, crew noticed slight bumping...

Attributes
ACN	611322
Time
Date	200403
Day	Wed
Local Time Of Day	0001 To 0600
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	msl bound lower : 668 msl bound upper : 11000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : zzz.tracon tower : zzz.tower
Operator	common carrier : air carrier
Make Model Name	MD-10 Conversion
Operating Under FAR Part	Part 121
Flight Phase	descent : approach
Route In Use	approach : traffic pattern
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 100 flight time total : 14000 flight time type : 3500
ASRS Report	611322
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Resolutory Action	none taken : detected after the fact
Consequence	other other
Supplementary
Problem Areas	Maintenance Human Performance Aircraft Flight Crew Human Performance
Primary Problem	Aircraft

Narrative:

Vectored on downwind at ZZZ, slowed to 210 KTS and extended slats. Turned base at 10-12 mi. At 190 KTS extended flaps 15. Intercepted localizer at 9-10 mi, slowed to 170 KTS and extended flaps 22 (six mi in trail of md-11.) gear down approximately 8 mi. At FAF slowed to less than 170 KTS and extended flaps 35. I noticed a slight bumping of the yoke (it felt like normal turbulence as we had 15 to 20 KT crosswind). I selected flap 50 with no change to controls, reselected flap 35 and made normal landing. Wind was less than five KTS at touchdown. Notified next day by maintenance that right inboard flap vane was missing an eight ft section. I recommend that our procedures be changed due to this being the second flap problem like this in two weeks. Possibly have maintenance check the flaps after arrival at the ramp. Maybe check flaps after engine start. Callback conversation with reporter revealed the following information: the reporter stated other than the slight bumping of the yoke that occurred at extension of flaps 35 everything appeared normal. The reporter said this is the second flap vane departure incident in two weeks and may require some added maintenance checks or inspections.

Original NASA ASRS Text

Title: AN MD10 AT FINAL APCH FIX EXTENDED FLAPS 35 SPEED LESS THAN 170 KTS, CREW NOTICED SLIGHT BUMPING IN YOKE. ON GND DISCOVERED 8 FT SECTION OF INBOARD FLAP VANE MISSING.

Narrative: VECTORED ON DOWNWIND AT ZZZ, SLOWED TO 210 KTS AND EXTENDED SLATS. TURNED BASE AT 10-12 MI. AT 190 KTS EXTENDED FLAPS 15. INTERCEPTED LOC AT 9-10 MI, SLOWED TO 170 KTS AND EXTENDED FLAPS 22 (SIX MI IN TRAIL OF MD-11.) GEAR DOWN APPROX 8 MI. AT FAF SLOWED TO LESS THAN 170 KTS AND EXTENDED FLAPS 35. I NOTICED A SLIGHT BUMPING OF THE YOKE (IT FELT LIKE NORMAL TURB AS WE HAD 15 TO 20 KT XWIND). I SELECTED FLAP 50 WITH NO CHANGE TO CONTROLS, RESELECTED FLAP 35 AND MADE NORMAL LNDG. WIND WAS LESS THAN FIVE KTS AT TOUCHDOWN. NOTIFIED NEXT DAY BY MAINT THAT R INBOARD FLAP VANE WAS MISSING AN EIGHT FT SECTION. I RECOMMEND THAT OUR PROCS BE CHANGED DUE TO THIS BEING THE SECOND FLAP PROB LIKE THIS IN TWO WKS. POSSIBLY HAVE MAINT CHECK THE FLAPS AFTER ARR AT THE RAMP. MAYBE CHECK FLAPS AFTER ENG START. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED OTHER THAN THE SLIGHT BUMPING OF THE YOKE THAT OCCURRED AT EXTENSION OF FLAPS 35 EVERYTHING APPEARED NORMAL. THE RPTR SAID THIS IS THE SECOND FLAP VANE DEP INCIDENT IN TWO WEEKS AND MAY REQUIRE SOME ADDED MAINT CHECKS OR INSPECTIONS.

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.

An MD10 at final approach fix extended flaps 35 speed less than 170 KTS, crew noticed slight bumping in yoke. On ground discovered 8 ft section of inboard flap vane missing.