<< >> NASA ASRS Report 110136, May 1989

Asymmetrical flap indication on flap indicator and by visual check. Recycling flaps corrected asymmetry.

Attributes
ACN	110136
Time
Date	198905
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : dsm
State Reference	IA
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 3 Turbojet Eng
Flight Phase	ground : preflight ground other : taxi
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : flight engineer
Experience	flight time last 90 days : 190 flight time total : 14500 flight time type : 8295
ASRS Report	110136
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 150 flight time total : 3300 flight time type : 400
ASRS Report	110333
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	other flight crewa
Resolutory Action	aircraft : equipment problem dissipated
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

While taxiing out for takeoff I called for flaps 15. First officer set flaps 15. While doing the takeoff check, first officer finds flap handle in 15, inboard flaps 0, outboard flaps 15. A visual check confirmed inboard flaps were up 0, outboard flaps 15, leading edge devices extended. Recycling the flap handle produced normal flaps inboard 15, outboard 15, leading edge devices extended. Recycling the flap handle between 0 and 15 several times continued to produce normal flaps. A visual check confirmed flaps, inboard 15, outboard 15, leading edge devices extended. No further problems encountered. A logbook entry was made.

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Original NASA ASRS Text

Title: ASYMMETRICAL FLAP INDICATION ON FLAP INDICATOR AND BY VISUAL CHECK. RECYCLING FLAPS CORRECTED ASYMMETRY.

Narrative: WHILE TAXIING OUT FOR TKOF I CALLED FOR FLAPS 15. F/O SET FLAPS 15. WHILE DOING THE TKOF CHECK, F/O FINDS FLAP HANDLE IN 15, INBOARD FLAPS 0, OUTBOARD FLAPS 15. A VISUAL CHECK CONFIRMED INBOARD FLAPS WERE UP 0, OUTBOARD FLAPS 15, LEADING EDGE DEVICES EXTENDED. RECYCLING THE FLAP HANDLE PRODUCED NORMAL FLAPS INBOARD 15, OUTBOARD 15, LEADING EDGE DEVICES EXTENDED. RECYCLING THE FLAP HANDLE BETWEEN 0 AND 15 SEVERAL TIMES CONTINUED TO PRODUCE NORMAL FLAPS. A VISUAL CHECK CONFIRMED FLAPS, INBOARD 15, OUTBOARD 15, LEADING EDGE DEVICES EXTENDED. NO FURTHER PROBLEMS ENCOUNTERED. A LOGBOOK ENTRY WAS MADE.

Data retrieved from NASA's ASRS site as of August 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.