B737 flight crew performs a partial 15 degree flap landing, overriding the flaps electrically when f...

Attributes
ACN	622229
Time
Date	200304
Day	Tue
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : cyyz.airport
State Reference	ON
Altitude	agl bound lower : 0 agl bound upper : 3000
Environment
Light	Night
Aircraft 1
Controlling Facilities	tracon : cyyz.tracon
Operator	common carrier : air carrier
Make Model Name	B737 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	descent : approach
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Experience	flight time last 90 days : 182 flight time total : 17000 flight time type : 2000
ASRS Report	622229
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : flap pos ind other flight crewa other flight crewb
Resolutory Action	other
Consequence	other other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

Flying at 3000 ft MSL on radar vector from approach control at 210 KIAS. Approach turned us toward the ILS runway 23 localizer course (on a planned visual approach due to WX). Approach told us to slow to 170 KIAS, and captain (PF) called for flaps 1 degree, then flaps 5 degrees, and finally flaps 10 degrees. Flaps moved from 0 degrees to 1 degree, then from 1 degree to 5 degrees, on command. Upon selecting flaps 10 degrees, flaps stuck at flaps 5 degrees. Captain called for 'trailing edge flaps malfunction' checklist from QRH. During procedure, it was determined that an 'asymmetry' was not indicated, and checklist was temporarily suspended until maintenance control was called. They agreed with captain that the electrical (alternate) method of flap extension was indicated, and checklist was continued to its conclusion. We landed with flaps at 15 degrees, at flaps 15 degrees reference. We did not declare an emergency, and did not call for equipment to be standing by due to vref 15 degrees only being 8 KTS higher than vref 30 degrees, and due to fact that we were on a visual approach. Landing followed without incident. In the morning, maintenance personnel had replaced the flap gauge, and cleared the write-up.

Original NASA ASRS Text

Title: B737 FLT CREW PERFORMS A PARTIAL 15 DEG FLAP LNDG, OVERRIDING THE FLAPS ELECTRICALLY WHEN FLAP INDICATORS SHOW THE FLAPS STOPPING AT 5 DEGS ON FINAL APCH TO RWY 23 AT CYYZ, ON.

Narrative: FLYING AT 3000 FT MSL ON RADAR VECTOR FROM APCH CTL AT 210 KIAS. APCH TURNED US TOWARD THE ILS RWY 23 LOC COURSE (ON A PLANNED VISUAL APCH DUE TO WX). APCH TOLD US TO SLOW TO 170 KIAS, AND CAPT (PF) CALLED FOR FLAPS 1 DEG, THEN FLAPS 5 DEGS, AND FINALLY FLAPS 10 DEGS. FLAPS MOVED FROM 0 DEGS TO 1 DEG, THEN FROM 1 DEG TO 5 DEGS, ON COMMAND. UPON SELECTING FLAPS 10 DEGS, FLAPS STUCK AT FLAPS 5 DEGS. CAPT CALLED FOR 'TRAILING EDGE FLAPS MALFUNCTION' CHKLIST FROM QRH. DURING PROC, IT WAS DETERMINED THAT AN 'ASYMMETRY' WAS NOT INDICATED, AND CHKLIST WAS TEMPORARILY SUSPENDED UNTIL MAINT CTL WAS CALLED. THEY AGREED WITH CAPT THAT THE ELECTRICAL (ALTERNATE) METHOD OF FLAP EXTENSION WAS INDICATED, AND CHKLIST WAS CONTINUED TO ITS CONCLUSION. WE LANDED WITH FLAPS AT 15 DEGS, AT FLAPS 15 DEGS REF. WE DID NOT DECLARE AN EMER, AND DID NOT CALL FOR EQUIP TO BE STANDING BY DUE TO VREF 15 DEGS ONLY BEING 8 KTS HIGHER THAN VREF 30 DEGS, AND DUE TO FACT THAT WE WERE ON A VISUAL APCH. LNDG FOLLOWED WITHOUT INCIDENT. IN THE MORNING, MAINT PERSONNEL HAD REPLACED THE FLAP GAUGE, AND CLRED THE WRITE-UP.

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.

B737 flight crew performs a partial 15 degree flap landing, overriding the flaps electrically when flap indicators show the flaps stopping at 5 degrees on final approach to runway 23 at cyyz, on.