Cpr twin engine training flight crew encounter a full roll wake from preceding B737 after turning fi...

Attributes
ACN	516628
Time
Date	200106
Day	Sat
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : abq.airport
State Reference	NM
Altitude	agl single value : 1000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : abq.tracon artcc : zma.artcc
Operator	general aviation : instructional
Make Model Name	Small Transport, Low Wing, 2 Recip Eng
Operating Under FAR Part	Part 91
Navigation In Use	ils localizer only : 8
Flight Phase	descent : approach
Route In Use	approach : instrument precision
Flight Plan	VFR
Person 1
Affiliation	company : charter other
Function	flight crew : captain instruction : instructor oversight : pic
Qualification	pilot : multi engine pilot : instrument pilot : cfi pilot : atp
Experience	flight time last 90 days : 145 flight time total : 3600 flight time type : 500
ASRS Report	516628
Person 2
Affiliation	other
Function	flight crew : first officer instruction : trainee
Events
Anomaly	altitude deviation : excursion from assigned altitude conflict : airborne less severe inflight encounter : wake turbulence non adherence : published procedure non adherence : required legal separation other anomaly other spatial deviation
Independent Detector	other controllera other flight crewa
Resolutory Action	flight crew : exited adverse environment flight crew : landed as precaution flight crew : regained aircraft control flight crew : took evasive action
Consequence	faa : investigated faa : reviewed incident with flight crew
Miss Distance	horizontal : 16000
Supplementary
Problem Areas	Environmental Factor ATC Human Performance Aircraft Flight Crew Human Performance Airspace Structure
Primary Problem	ATC Human Performance

Narrative:

While doing a practice ILS approach, we were vectored close behind a B737. I was concerned, but the other aircraft was faster and we were 2 mi in trail, but below its flight path. Without warning, we rolled left violently. I elected to continue the roll all the way through. We lost about 400 ft. No damage to our plane, we broke off the approach. Tower asked if we were ok. We said 'stand by.' then after our aircraft seemed to fly ok, we came around and asked to continue the approach to a full stop. 2 mechanics inspected our aircraft and said it showed no signs of structural damage. We called the tower supervisor and discussed the incident. He said he would alert his controllers to spacing issues. We might have refused the vector, but the spacing seemed ok. However, even a B737 can make a big wake, and we were below his high approach path. The upset occurred with no warning and could not be stopped.

Original NASA ASRS Text

Title: CPR TWIN ENG TRAINING FLC ENCOUNTER A FULL ROLL WAKE FROM PRECEDING B737 AFTER TURNING FINAL AT ABQ.

Narrative: WHILE DOING A PRACTICE ILS APCH, WE WERE VECTORED CLOSE BEHIND A B737. I WAS CONCERNED, BUT THE OTHER ACFT WAS FASTER AND WE WERE 2 MI IN TRAIL, BUT BELOW ITS FLT PATH. WITHOUT WARNING, WE ROLLED L VIOLENTLY. I ELECTED TO CONTINUE THE ROLL ALL THE WAY THROUGH. WE LOST ABOUT 400 FT. NO DAMAGE TO OUR PLANE, WE BROKE OFF THE APCH. TWR ASKED IF WE WERE OK. WE SAID 'STAND BY.' THEN AFTER OUR ACFT SEEMED TO FLY OK, WE CAME AROUND AND ASKED TO CONTINUE THE APCH TO A FULL STOP. 2 MECHS INSPECTED OUR ACFT AND SAID IT SHOWED NO SIGNS OF STRUCTURAL DAMAGE. WE CALLED THE TWR SUPVR AND DISCUSSED THE INCIDENT. HE SAID HE WOULD ALERT HIS CTLRS TO SPACING ISSUES. WE MIGHT HAVE REFUSED THE VECTOR, BUT THE SPACING SEEMED OK. HOWEVER, EVEN A B737 CAN MAKE A BIG WAKE, AND WE WERE BELOW HIS HIGH APCH PATH. THE UPSET OCCURRED WITH NO WARNING AND COULD NOT BE STOPPED.

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.

Cpr twin engine training flight crew encounter a full roll wake from preceding B737 after turning final at abq.