LR25 loss of aircraft control due to possible wake turbulence from B727.

Attributes
ACN	320781
Time
Date	199511
Day	Fri
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : dqo
State Reference	DE
Altitude	msl bound lower : 17300 msl bound upper : 17300
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tower : ord
Operator	general aviation : corporate
Make Model Name	Learjet 25
Operating Under FAR Part	other : unknown
Flight Phase	descent other
Route In Use	arrival other enroute airway : zdc
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	B727 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	descent other
Route In Use	arrival other
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Experience	controller military : 4 controller non radar : 2 controller radar : 9 controller supervisory : 2
ASRS Report	320781
Person 2
Affiliation	Other
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	inflight encounter other other anomaly
Independent Detector	other flight crewa
Resolutory Action	flight crew : regained aircraft control
Consequence	faa : reviewed incident with flight crew
Supplementary
Air Traffic Incident	other

Narrative:

Cpr X, LR25 was en route to mmu via the METRO4 arrival. I was working the R19 (goodstown) sector and R18 (dupont) sector in a combined status, during a moderate arrival flow to the ny metropolitan areas. As the LR25 approached ard VOR the pilot asked if he was following a heavy aircraft. I recalled no heavy aircraft in the vicinity of cpr X during his descent, but there was an air carrier Y, a B727, on the arrival route in front of him by about 12 mi. The pilot on cpr X reported he had hit a wake vortex at about 17300 ft and it tossed the aircraft about 90 degrees left in a roll. I asked the pilot if he recalled if the wind was calm at the occurrence altitude. He replied affirmative.

Original NASA ASRS Text

Title: LR25 LOSS OF ACFT CTL DUE TO POSSIBLE WAKE TURB FROM B727.

Narrative: CPR X, LR25 WAS ENRTE TO MMU VIA THE METRO4 ARR. I WAS WORKING THE R19 (GOODSTOWN) SECTOR AND R18 (DUPONT) SECTOR IN A COMBINED STATUS, DURING A MODERATE ARR FLOW TO THE NY METRO AREAS. AS THE LR25 APCHED ARD VOR THE PLT ASKED IF HE WAS FOLLOWING A HVY ACFT. I RECALLED NO HVY ACFT IN THE VICINITY OF CPR X DURING HIS DSCNT, BUT THERE WAS AN ACR Y, A B727, ON THE ARR RTE IN FRONT OF HIM BY ABOUT 12 MI. THE PLT ON CPR X RPTED HE HAD HIT A WAKE VORTEX AT ABOUT 17300 FT AND IT TOSSED THE ACFT ABOUT 90 DEGS L IN A ROLL. I ASKED THE PLT IF HE RECALLED IF THE WIND WAS CALM AT THE OCCURRENCE ALT. HE REPLIED AFFIRMATIVE.

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.