A B727 blows debris from a closed portion of runway 13L during takeoff at dsm, ia.

Attributes
ACN	448067
Time
Date	199909
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : dsm.airport
State Reference	IA
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B727 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	climbout : initial climbout : takeoff ground : takeoff roll
Route In Use	departure : other published ifr departure
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : multi engine pilot : atp pilot : cfi pilot : flight engineer pilot : instrument
Experience	flight time last 90 days : 240 flight time total : 12000 flight time type : 5800
ASRS Report	448067
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : multi engine pilot : flight engineer pilot : commercial pilot : atp
Experience	flight time last 90 days : 210 flight time total : 7500 flight time type : 3200
ASRS Report	448066
Events
Anomaly	conflict : ground less severe
Independent Detector	other other : 5
Resolutory Action	none taken : detected after the fact
Consequence	faa : reviewed incident with flight crew
Supplementary
Problem Areas	Environmental Factor Aircraft Airport
Primary Problem	Airport

Narrative:

Runway 13L was assigned for takeoff. Data was computed taking into account first 1000 ft closed and the last 1500 ft closed. Takeoff roll and liftoff were normal with liftoff occurring prior to the last 1500 ft. An airport vehicle reported we infringed on the closed portion. We did not. All performance data supports a liftoff prior to last 1500 ft. In addition, performance data allowed for an abort and stop prior to last 1500 ft. Supplemental information from acn 448066: runway data computed 3 different times for distance available. Flaps 5 degrees selected and a normal profile executed after takeoff clearance received. Upon arrival in ord, informed that we had transgressed a closed portion of runway on departure, as reported to dsm tower by construction workers in vicinity of runway 13L. Blown debris had then caused closure of runway for cleanup. If all data supported our profile, can only guess that B727 profile more shallow than most aircraft departing dsm, and thus blew more debris than they are used to.

Original NASA ASRS Text

Title: A B727 BLOWS DEBRIS FROM A CLOSED PORTION OF RWY 13L DURING TKOF AT DSM, IA.

Narrative: RWY 13L WAS ASSIGNED FOR TKOF. DATA WAS COMPUTED TAKING INTO ACCOUNT FIRST 1000 FT CLOSED AND THE LAST 1500 FT CLOSED. TKOF ROLL AND LIFTOFF WERE NORMAL WITH LIFTOFF OCCURRING PRIOR TO THE LAST 1500 FT. AN ARPT VEHICLE RPTED WE INFRINGED ON THE CLOSED PORTION. WE DID NOT. ALL PERFORMANCE DATA SUPPORTS A LIFTOFF PRIOR TO LAST 1500 FT. IN ADDITION, PERFORMANCE DATA ALLOWED FOR AN ABORT AND STOP PRIOR TO LAST 1500 FT. SUPPLEMENTAL INFO FROM ACN 448066: RWY DATA COMPUTED 3 DIFFERENT TIMES FOR DISTANCE AVAILABLE. FLAPS 5 DEGS SELECTED AND A NORMAL PROFILE EXECUTED AFTER TKOF CLRNC RECEIVED. UPON ARR IN ORD, INFORMED THAT WE HAD TRANSGRESSED A CLOSED PORTION OF RWY ON DEP, AS RPTED TO DSM TWR BY CONSTRUCTION WORKERS IN VICINITY OF RWY 13L. BLOWN DEBRIS HAD THEN CAUSED CLOSURE OF RWY FOR CLEANUP. IF ALL DATA SUPPORTED OUR PROFILE, CAN ONLY GUESS THAT B727 PROFILE MORE SHALLOW THAN MOST ACFT DEPARTING DSM, AND THUS BLEW MORE DEBRIS THAN THEY ARE USED TO.

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.