B737-800 flight crew reported wake vortex encounter in trail of a B747-400 on arrival to mia that re...

Attributes
ACN	1142441
Time
Date	201401
Local Time Of Day	1201-1800
Place
Locale Reference	MIA.Airport
State Reference	FL
Environment
Flight Conditions	VMC
Aircraft 1
Make Model Name	B737-800
Operating Under FAR Part	Part 121
Flight Phase	Initial Approach
Route In Use	STAR FLIPR TWO
Aircraft 2
Make Model Name	B747-400
Flight Phase	Descent
Person 1
Function	Captain Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Total 16000
Person 2
Function	Pilot Flying First Officer
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	ATC Issue All Types Deviation - Altitude Excursion From Assigned Altitude Inflight Event / Encounter Wake Vortex Encounter Inflight Event / Encounter Loss Of Aircraft Control

Narrative:

[We were] on the flipr two arrival at 10;000 ft over virginia key (vkz); following 747-400 approximately 1;000 ft above our altitude. Aircraft encountered wake turbulence. [We] could not maintain altitude; pitch or roll [and] abruptly lost approximately 300 ft; rolled left and right; pitched nose down. [We] turned off course [and] recovered control of aircraft. Informed ATC; passengers; and flight crew reported no injuries. Landed and received ACARS message for severe turbulence logged incident in logbook. ATC caused this by too close spacing. Also; no wind at altitude was a major contribution. Amazing that 24 hours later; same flight; same place; ATC tried to put the flight too close to 777 heavy; different winds. ATC needs more spacing.

Original NASA ASRS Text

Title: B737-800 flight crew reported wake vortex encounter in trail of a B747-400 on arrival to MIA that resulted in loss of pitch and roll control and 300 FT altitude excursion.

Narrative: [We were] on the FLIPR TWO Arrival at 10;000 FT over Virginia Key (VKZ); following 747-400 approximately 1;000 FT above our altitude. Aircraft encountered wake turbulence. [We] could not maintain altitude; pitch or roll [and] abruptly lost approximately 300 FT; rolled left and right; pitched nose down. [We] turned off course [and] recovered control of aircraft. Informed ATC; passengers; and flight crew reported no injuries. Landed and received ACARS message for Severe Turbulence Logged incident in logbook. ATC caused this by too close spacing. Also; no wind at altitude was a major contribution. Amazing that 24 hours later; same flight; same place; ATC tried to put the flight too close to 777 heavy; different winds. ATC needs more spacing.

Data retrieved from NASA's ASRS site 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.

B737-800 flight crew reported wake vortex encounter in trail of a B747-400 on arrival to mia that resulted in loss of pitch and roll control and 300 ft altitude excursion.