B727 had split flaps during extension causing inboard flaps to lock at about 15 degrees. Irregular checklist was run twice before the flaps were freed and extended normally.

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Attributes
ACN	353676
Time
Date	199611
Day	Tue
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : gum
State Reference	GU
Altitude	msl bound lower : 2000 msl bound upper : 2000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : gum
Operator	common carrier : air carrier
Make Model Name	B727 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Route In Use	approach : visual
Flight Plan	VFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : flight engineer pilot : atp
Experience	flight time last 90 days : 200 flight time total : 17000 flight time type : 3000
ASRS Report	353676
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	aircraft equipment problem : less severe
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : overcame equipment problem
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

Flaps were extended during a visual approach. The warning horn sounded and could not be silenced. I called for additional flaps. The inboard flaps stuck at 15 degrees, outboards extended normally. Warning horn was stopped by pulling circuit breakers. Go around was accomplished. Appropriate checklists ran twice. On second time through checklist, inboard flaps extended. Prior to inboard flaps extending, 3 or 4 jolts were felt with no flap movement indicated on the gauge. Fire trucks were requested. No emergency was declared. A normal full stop landing followed.

Original NASA ASRS Text

Title: B727 HAD SPLIT FLAPS DURING EXTENSION CAUSING INBOARD FLAPS TO LOCK AT ABOUT 15 DEGS. IRREGULAR CHKLIST WAS RUN TWICE BEFORE THE FLAPS WERE FREED AND EXTENDED NORMALLY.

Narrative: FLAPS WERE EXTENDED DURING A VISUAL APCH. THE WARNING HORN SOUNDED AND COULD NOT BE SILENCED. I CALLED FOR ADDITIONAL FLAPS. THE INBOARD FLAPS STUCK AT 15 DEGS, OUTBOARDS EXTENDED NORMALLY. WARNING HORN WAS STOPPED BY PULLING CIRCUIT BREAKERS. GAR WAS ACCOMPLISHED. APPROPRIATE CHKLISTS RAN TWICE. ON SECOND TIME THROUGH CHKLIST, INBOARD FLAPS EXTENDED. PRIOR TO INBOARD FLAPS EXTENDING, 3 OR 4 JOLTS WERE FELT WITH NO FLAP MOVEMENT INDICATED ON THE GAUGE. FIRE TRUCKS WERE REQUESTED. NO EMER WAS DECLARED. A NORMAL FULL STOP LNDG FOLLOWED.

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.