Aircraft performance miscalculation. Landing distance computation.

Attributes
ACN	295225
Time
Date	199502
Day	Wed
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : tupj
State Reference	VI
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air taxi
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 135
Flight Phase	landing 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 : 150 flight time total : 7000 flight time type : 4500
ASRS Report	295225
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	non adherence : far non adherence : published procedure other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : detected after the fact
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Prior to departing on our flight (aracho to beef island) we received WX for the flight. When we computed our landing performance, we used a 10 KT headwind component. Upon landing at our destination, there was only a 3-4 KT headwind component. With this decrease in mind, the landing distances increased. With this increase, we were over our required landing distance by approximately 150 ft for far 135 operations, while far 91 landing distance was well within the requirements. For future landing distance performance, it is safer to figure on no winds for landing, especially when runway lengths are that critical.

Original NASA ASRS Text

Title: ACFT PERFORMANCE MISCALCULATION. LNDG DISTANCE COMPUTATION.

Narrative: PRIOR TO DEPARTING ON OUR FLT (ARACHO TO BEEF ISLAND) WE RECEIVED WX FOR THE FLT. WHEN WE COMPUTED OUR LNDG PERFORMANCE, WE USED A 10 KT HEADWIND COMPONENT. UPON LNDG AT OUR DEST, THERE WAS ONLY A 3-4 KT HEADWIND COMPONENT. WITH THIS DECREASE IN MIND, THE LNDG DISTANCES INCREASED. WITH THIS INCREASE, WE WERE OVER OUR REQUIRED LNDG DISTANCE BY APPROX 150 FT FOR FAR 135 OPS, WHILE FAR 91 LNDG DISTANCE WAS WELL WITHIN THE REQUIREMENTS. FOR FUTURE LNDG DISTANCE PERFORMANCE, IT IS SAFER TO FIGURE ON NO WINDS FOR LNDG, ESPECIALLY WHEN RWY LENGTHS ARE THAT CRITICAL.

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.