<< >> NASA ASRS Report 311600, July 1995

Flight crew concern voiced over the use of 40 degrees of flaps for approach and landing vice the use of 30 degrees of flaps. Crew cites overweight landing.

Attributes
ACN	311600
Time
Date	199507
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : sea
State Reference	WA
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : rdg
Operator	common carrier : air carrier
Make Model Name	B727 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	descent : approach landing other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : instrument pilot : commercial pilot : atp
Experience	flight time last 90 days : 155
ASRS Report	311600
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp pilot : commercial pilot : instrument pilot : flight engineer
Experience	flight time last 90 days : 210 flight time total : 10000 flight time type : 6000
ASRS Report	311676
Events
Anomaly	non adherence : published procedure other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : anomaly accepted
Consequence	Other
Supplementary
Primary Problem	Ambiguous
Air Traffic Incident	Pilot Deviation

Narrative:

In order to slow for traffic landing ahead of us, we slowed to and used flaps 40 degree speeds. We were at a 'legal' weight (143500 pounds) for flaps 40 degrees in flight. Upon taxi-in, we discovered that we actually landed 300 pounds overweight. Under these conditions, I deemed it as safe to land overweight as to dump fuel or go around. Supplemental information from acn 311676: the aircraft on the approach to runway 34R ahead of us slowed rather suddenly. In order to slow enough to maintain adequate separation, the captain elected to use 40 degree flaps, after having ascertained that we weighed less than the maximum in-flight weight for 40 degrees flaps. Maintenance checked the aircraft and everything was normal.

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Original NASA ASRS Text

Title: FLC CONCERN VOICED OVER THE USE OF 40 DEGS OF FLAPS FOR APCH AND LNDG VICE THE USE OF 30 DEGS OF FLAPS. CREW CITES OVERWT LNDG.

Narrative: IN ORDER TO SLOW FOR TFC LNDG AHEAD OF US, WE SLOWED TO AND USED FLAPS 40 DEG SPDS. WE WERE AT A 'LEGAL' WT (143500 LBS) FOR FLAPS 40 DEGS IN FLT. UPON TAXI-IN, WE DISCOVERED THAT WE ACTUALLY LANDED 300 LBS OVERWT. UNDER THESE CONDITIONS, I DEEMED IT AS SAFE TO LAND OVERWT AS TO DUMP FUEL OR GAR. SUPPLEMENTAL INFO FROM ACN 311676: THE ACFT ON THE APCH TO RWY 34R AHEAD OF US SLOWED RATHER SUDDENLY. IN ORDER TO SLOW ENOUGH TO MAINTAIN ADEQUATE SEPARATION, THE CAPT ELECTED TO USE 40 DEG FLAPS, AFTER HAVING ASCERTAINED THAT WE WEIGHED LESS THAN THE MAX INFLT WT FOR 40 DEGS FLAPS. MAINT CHKED THE ACFT AND EVERYTHING WAS NORMAL.

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.