A corporate jet encountered wake turbulence climbing through 11;000 ft from a B747 2;500 ft above th...

Attributes
ACN	960077
Time
Date	201107
Local Time Of Day	1801-2400
Place
Locale Reference	ZLA.ARTCC
State Reference	CA
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Citation Excel (C560XL)
Operating Under FAR Part	Part 91
Flight Phase	Climb
Route In Use	SID PEERE 1
Aircraft 2
Make Model Name	B747 Undifferentiated or Other Model
Person 1
Function	Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Deviation - Track / Heading All Types Inflight Event / Encounter Loss Of Aircraft Control Inflight Event / Encounter Wake Vortex Encounter

Narrative:

Encountered severe turbulence and aircraft upset resulting in momentary loss of aircraft control. [We were] climbing 2;000 FPM thru 11;000 ft at 250 KTS just after passing twine waypoint on the peere-1 departure out of smo. Autopilot tripped off and aircraft entered an uncommanded abrupt left roll. Full right aileron input held the left bank at 70-80 degrees for 3-5 seconds before wings level recovery could be made. Lax center was informed of the incident. They then informed us that we were 11 miles in trail of a heavy 747 2;500 ft above us. No previous traffic advisory was issued. Contacted assistant chief pilot on duty and concurred to continue to destination with passengers as there were no abnormal flight characteristics noted and autopilot was back on line. [We] contacted maintenance to arrange a post flight inspection of aircraft. Fortunately all 3 passengers were seated and strapped in. No injuries were sustained. Suggestions: better ATC aircraft separation.

Original NASA ASRS Text

Title: A corporate jet encountered wake turbulence climbing through 11;000 FT from a B747 2;500 FT above them. The encounter resulted in a 70-80 degree roll to the left before control was regained.

Narrative: Encountered severe turbulence and aircraft upset resulting in momentary loss of aircraft control. [We were] climbing 2;000 FPM thru 11;000 FT at 250 KTS just after passing Twine Waypoint on the PEERE-1 Departure out of SMO. Autopilot tripped off and aircraft entered an uncommanded abrupt left roll. Full right aileron input held the left bank at 70-80 degrees for 3-5 seconds before wings level recovery could be made. LAX Center was informed of the incident. They then informed us that we were 11 miles in trail of a heavy 747 2;500 FT above us. No previous traffic advisory was issued. Contacted Assistant Chief Pilot on duty and concurred to continue to destination with passengers as there were no abnormal flight characteristics noted and autopilot was back on line. [We] contacted Maintenance to arrange a post flight inspection of aircraft. Fortunately all 3 passengers were seated and strapped in. No injuries were sustained. Suggestions: Better ATC aircraft separation.

Data retrieved from NASA's ASRS site as of April 2012 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.

A corporate jet encountered wake turbulence climbing through 11;000 ft from a B747 2;500 ft above them. The encounter resulted in a 70-80 degree roll to the left before control was regained.