Flight crew of a light transport business jet lost control of the aircraft during takeoff roll resul...

Attributes
ACN	323771
Time
Date	199512
Day	Sun
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : phl
State Reference	PA
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Operator	general aviation : personal
Make Model Name	Learjet 55
Operating Under FAR Part	Part 91
Flight Phase	climbout : takeoff
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	B747 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	Other
Flight Phase	landing other
Flight Plan	IFR
Person 1
Affiliation	Other
Function	flight crew : first officer
Qualification	other other : other pilot : atp
Experience	flight time last 90 days : 130 flight time total : 7400 flight time type : 150
ASRS Report	323771
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	other anomaly other anomaly other other anomaly other
Independent Detector	other flight crewa
Resolutory Action	other
Consequence	faa : investigated other
Supplementary
Air Traffic Incident	other

Narrative:

We taxied to departure end of runway 35 at phl where we held clear of the runway while a twin landed on runway 35, shortly after a B747 landed on runway 27R. As soon as this aircraft cleared our runway we were cleared for takeoff. We completed the takeoff checklist and taxied into position, where the captain advanced the power levers and asked that I set power. I set takeoff power and advised the captain. Next I monitored all cockpit instruments and annunciators, I then called out airspeed alive and the captain acknowledged. Very shortly thereafter I witnessed a rough ride and some unusual noise. It was at this time I realized we were off the runway and the captain aborted the takeoff. The aircraft came to a rest about 20 ft off the left side of runway 35 and 900-1000 ft down the runway. I believe we either had a steering problem or the wingtip vortices of the intersecting landing aircraft caused this aircraft to depart the runway. Callback conversation with reporter revealed the following information: reporter stated that subsequent investigation of this incident did not reveal any mechanical problem with the nose gear steering or any other malfunction. The aircraft, lear jet 55, received damage to a wheel and tire when going off the side of the runway. The flight crew still believes that it must have been the right wing vortex as it passed over the intersecting runways and settled down on the direct flight path of their aircraft as it made the takeoff roll. However, the cause of the incident has been classified as their fault and is noted in their pilot records.

Original NASA ASRS Text

Title: FLC OF A LTT BUSINESS JET LOST CTL OF THE ACFT DURING TKOF ROLL RESULTING IN THE ACFT GOING OFF THE SIDE OF THE RWY CAUSING DAMAGE TO ONE WHEEL AND TIRE.

Narrative: WE TAXIED TO DEP END OF RWY 35 AT PHL WHERE WE HELD CLR OF THE RWY WHILE A TWIN LANDED ON RWY 35, SHORTLY AFTER A B747 LANDED ON RWY 27R. AS SOON AS THIS ACFT CLRED OUR RWY WE WERE CLRED FOR TKOF. WE COMPLETED THE TKOF CHKLIST AND TAXIED INTO POS, WHERE THE CAPT ADVANCED THE PWR LEVERS AND ASKED THAT I SET PWR. I SET TKOF PWR AND ADVISED THE CAPT. NEXT I MONITORED ALL COCKPIT INSTS AND ANNUNCIATORS, I THEN CALLED OUT AIRSPD ALIVE AND THE CAPT ACKNOWLEDGED. VERY SHORTLY THEREAFTER I WITNESSED A ROUGH RIDE AND SOME UNUSUAL NOISE. IT WAS AT THIS TIME I REALIZED WE WERE OFF THE RWY AND THE CAPT ABORTED THE TKOF. THE ACFT CAME TO A REST ABOUT 20 FT OFF THE L SIDE OF RWY 35 AND 900-1000 FT DOWN THE RWY. I BELIEVE WE EITHER HAD A STEERING PROB OR THE WINGTIP VORTICES OF THE INTERSECTING LNDG ACFT CAUSED THIS ACFT TO DEPART THE RWY. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR STATED THAT SUBSEQUENT INVESTIGATION OF THIS INCIDENT DID NOT REVEAL ANY MECHANICAL PROB WITH THE NOSE GEAR STEERING OR ANY OTHER MALFUNCTION. THE ACFT, LEAR JET 55, RECEIVED DAMAGE TO A WHEEL AND TIRE WHEN GOING OFF THE SIDE OF THE RWY. THE FLC STILL BELIEVES THAT IT MUST HAVE BEEN THE R WING VORTEX AS IT PASSED OVER THE INTERSECTING RWYS AND SETTLED DOWN ON THE DIRECT FLT PATH OF THEIR ACFT AS IT MADE THE TKOF ROLL. HOWEVER, THE CAUSE OF THE INCIDENT HAS BEEN CLASSIFIED AS THEIR FAULT AND IS NOTED IN THEIR PLT RECORDS.

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.

Flight crew of a light transport business jet lost control of the aircraft during takeoff roll resulting in the aircraft going off the side of the runway causing damage to one wheel and tire.