B727 had jet blast from a departing B727.

Attributes
ACN	420333
Time
Date	199811
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : mia airport : mia
State Reference	FL
Altitude	agl bound lower : 100 agl bound upper : 200
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : mia
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 3 Turbojet Eng
Flight Phase	descent : approach
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 3 Turbojet Eng
Flight Phase	climbout : takeoff
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	420333
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	inflight encounter other other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : insufficient time
Consequence	Other
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	other
Situations
ATC Facility	procedure or policy : unspecified
Airport	other physical facility

Narrative:

Jet blast arriving at mia. A hazard exists when landing on runway 12 at mia while another aircraft is departing on runway 9L. A B727 departed just as we were between 200 ft and 100 ft on approach. We experienced significant jet blast. We were slightly high due to following a B757. I expected the jet blast, and it was not B757 wake turbulence, in my opinion. The B757 was 5 mi ahead. I have experienced arrival wake turbulence from a B757 and this was not it. We felt jet blast.

Original NASA ASRS Text

Title: B727 HAD JET BLAST FROM A DEPARTING B727.

Narrative: JET BLAST ARRIVING AT MIA. A HAZARD EXISTS WHEN LNDG ON RWY 12 AT MIA WHILE ANOTHER ACFT IS DEPARTING ON RWY 9L. A B727 DEPARTED JUST AS WE WERE BTWN 200 FT AND 100 FT ON APCH. WE EXPERIENCED SIGNIFICANT JET BLAST. WE WERE SLIGHTLY HIGH DUE TO FOLLOWING A B757. I EXPECTED THE JET BLAST, AND IT WAS NOT B757 WAKE TURB, IN MY OPINION. THE B757 WAS 5 MI AHEAD. I HAVE EXPERIENCED ARR WAKE TURB FROM A B757 AND THIS WAS NOT IT. WE FELT JET BLAST.

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.