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B727 aircraft on final approach and B747 spooling up engines to taxi onto converging runway. Reporter captain believes they hit wake from the B747 resulting in a high sink rate and bounced landing. Reporter ordered first officer to go around.
| Attributes | |
| ACN | 380460 |
| Time | |
| Date | 199709 |
| Day | Sat |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : mia |
| State Reference | FL |
| Altitude | agl bound lower : 0 agl bound upper : 50 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : mia |
| Operator | common carrier : air carrier |
| Make Model Name | B727 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : approach landing other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | B747 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other |
| Flight Phase | ground other : taxi |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : flight engineer pilot : cfi pilot : atp |
| Experience | flight time last 90 days : 215 flight time total : 14500 flight time type : 10000 |
| ASRS Report | 380460 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial |
| Events | |
| Anomaly | inflight encounter other other anomaly other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : regained aircraft control flight crew : exited adverse environment other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | other |
| Situations | |
| ATC Facility | procedure or policy : unspecified |
| Airport | other physical facility |
Narrative:
We were vectored for a visual approach to runway 12 at mia. As we neared the runway, a foreign carrier's B747 was taking position on runway 9L. In order for the B747 to taxi onto runway 9L, it had to 'jet blast' the area of the threshold of runway 12. The wind was 080 degrees at 9 KTS. As we neared the runway, I cautioned the first officer to watch for jet blast from the B747. His approach was totally stabilized. At about 50 ft AGL, we hit rough air, a gain of 10-15 KTS airspeed, followed by a rapid loss of 15 KTS. We touched down very firmly, nose high at vref and experienced a high bounce. Due to the ht of the bounce, as captain, I commanded a go around. We landed uneventfully the next time around in smooth air.
Original NASA ASRS Text
Title: B727 ACFT ON FINAL APCH AND B747 SPOOLING UP ENGS TO TAXI ONTO CONVERGING RWY. RPTR CAPT BELIEVES THEY HIT WAKE FROM THE B747 RESULTING IN A HIGH SINK RATE AND BOUNCED LNDG. RPTR ORDERED FO TO GAR.
Narrative: WE WERE VECTORED FOR A VISUAL APCH TO RWY 12 AT MIA. AS WE NEARED THE RWY, A FOREIGN CARRIER'S B747 WAS TAKING POS ON RWY 9L. IN ORDER FOR THE B747 TO TAXI ONTO RWY 9L, IT HAD TO 'JET BLAST' THE AREA OF THE THRESHOLD OF RWY 12. THE WIND WAS 080 DEGS AT 9 KTS. AS WE NEARED THE RWY, I CAUTIONED THE FO TO WATCH FOR JET BLAST FROM THE B747. HIS APCH WAS TOTALLY STABILIZED. AT ABOUT 50 FT AGL, WE HIT ROUGH AIR, A GAIN OF 10-15 KTS AIRSPD, FOLLOWED BY A RAPID LOSS OF 15 KTS. WE TOUCHED DOWN VERY FIRMLY, NOSE HIGH AT VREF AND EXPERIENCED A HIGH BOUNCE. DUE TO THE HT OF THE BOUNCE, AS CAPT, I COMMANDED A GAR. WE LANDED UNEVENTFULLY THE NEXT TIME AROUND IN SMOOTH AIR.
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.