Precautionary landing made in diversion to alternate airport with aircraft equipment problem.

Attributes
ACN	238385
Time
Date	199303
Day	Wed
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : mci
State Reference	MO
Altitude	msl bound lower : 37000 msl bound upper : 37000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zkc
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	cruise other landing other other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 120 flight time total : 14500 flight time type : 1000
ASRS Report	238385
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa other other : unspecified
Resolutory Action	other
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

At FL370, mach .80 in stabilized cruise, I received a message on the FMS CDU stating 'flap limit speed.' I also noticed the speed scale on the ADI change, from white to yellow, several times. The autothrottles retarded power in attempt to slow the aircraft below flap limit speed. I was advised by a flight attendant that there was a 'banging' noise in the wing area. The autothrottles were disconnected and speed stabilized at 245 KTS. There were no other indications, i.e., hydraulic or confign. I sent the first officer back to check on the noise and he confirmed a rumbling or banging noise. Since we had 3 hours remaining to seattle, I elected to land at mci. The landing was uneventful and nothing was found. The FMS was 'reseated' and the flight continued uneventfully.

Original NASA ASRS Text

Title: PRECAUTIONARY LNDG MADE IN DIVERSION TO ALTERNATE ARPT WITH ACFT EQUIP PROB.

Narrative: AT FL370, MACH .80 IN STABILIZED CRUISE, I RECEIVED A MESSAGE ON THE FMS CDU STATING 'FLAP LIMIT SPD.' I ALSO NOTICED THE SPD SCALE ON THE ADI CHANGE, FROM WHITE TO YELLOW, SEVERAL TIMES. THE AUTOTHROTTLES RETARDED PWR IN ATTEMPT TO SLOW THE ACFT BELOW FLAP LIMIT SPD. I WAS ADVISED BY A FLT ATTENDANT THAT THERE WAS A 'BANGING' NOISE IN THE WING AREA. THE AUTOTHROTTLES WERE DISCONNECTED AND SPD STABILIZED AT 245 KTS. THERE WERE NO OTHER INDICATIONS, I.E., HYD OR CONFIGN. I SENT THE FO BACK TO CHK ON THE NOISE AND HE CONFIRMED A RUMBLING OR BANGING NOISE. SINCE WE HAD 3 HRS REMAINING TO SEATTLE, I ELECTED TO LAND AT MCI. THE LNDG WAS UNEVENTFUL AND NOTHING WAS FOUND. THE FMS WAS 'RESEATED' AND THE FLT CONTINUED UNEVENTFULLY.

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.