|37000 Feet||Browse and search NASA's
Aviation Safety Reporting System
|Local Time Of Day||1801 To 2400|
|Locale Reference||airport : mia|
|Altitude||agl bound lower : 0|
agl bound upper : 0
|Operator||common carrier : air carrier|
|Make Model Name||B757 Undifferentiated or Other Model|
|Operating Under FAR Part||Part 121|
|Navigation In Use||Other |
|Flight Phase||ground other : taxi|
|Affiliation||company : air carrier|
|Function||flight crew : captain|
oversight : pic
|Qualification||pilot : atp|
|Experience||flight time last 90 days : 225|
flight time total : 16000
flight time type : 900
|Affiliation||company : air carrier|
|Function||flight crew : first officer|
|Qualification||pilot : instrument|
pilot : commercial
|Anomaly||other anomaly other|
|Independent Detector||other flight crewa|
|Resolutory Action||none taken : anomaly accepted|
|Air Traffic Incident||other|
|Airport||other physical facility|
Location: ramp between concourses X and Y at mia. Departed gate Z at mia late evening weighing about 207000 pounds. Pushed back from gate. Using the maximum 35% N1 power for breakaway the aircraft would not move. It had sunk into the tarmac even on this cool spring evening. I left 35% power for 30 seconds to 1 min before the aircraft finally started to creep out of the ruts. I have gone through mia several times the past few weeks and have experienced similar problems. The mia ramp -- especially between concourses X and Y is soft and full of ruts and sunken in spots. It is almost impossible to taxi a moderate weight aircraft out of the tight corners and stay within the power parameters in the operations manual. Mia should either fix the ramps or as a standard procedure tug us further out onto the ramps where higher breakaway power settings can safely be used. Callback conversation with reporter revealed the following information: reporter stated that he has not been back to the mia airport since his report, but understands from other company flcs that there have been no changes to the ramp condition. He further advised that he had heard that there was an incident in which a ground crew member was knocked down by jet blast when the departing aircraft had to go above maximum company recommended breakaway power in leaving the ramp area. He said that there is considerable construction going on near and around the area and hears that the concourse areas will be resurfaced. Since he realizes that it will probably be a long time before the concourse ramps are resurfaced, he hopes the company will provide notice to crews of heavy aircraft to be tugged out far enough for the use of more breakaway power. The reporter stated that he has 16000 hours total time: 225 hours in the last 90 days and 900 hours in B757 and B767 type aircraft.
Original NASA ASRS Text
Title: CAPT OF A B757 EXPERIENCED DIFFICULTY IN TAXIING FROM THE RAMP AFTER PUSHBACK USING MAX APPROVED BREAKAWAY PWR DUE TO THE ACFT TIRES SINKING INTO THE TARMAC. THE RPTR BELIEVES THAT THE RAMP SURFACE CONDITION CANNOT APPROPRIATELY SUPPORT THE WT OF HIS ACFT.
Narrative: LOCATION: RAMP BTWN CONCOURSES X AND Y AT MIA. DEPARTED GATE Z AT MIA LATE EVENING WEIGHING ABOUT 207000 LBS. PUSHED BACK FROM GATE. USING THE MAX 35% N1 PWR FOR BREAKAWAY THE ACFT WOULD NOT MOVE. IT HAD SUNK INTO THE TARMAC EVEN ON THIS COOL SPRING EVENING. I LEFT 35% PWR FOR 30 SECONDS TO 1 MIN BEFORE THE ACFT FINALLY STARTED TO CREEP OUT OF THE RUTS. I HAVE GONE THROUGH MIA SEVERAL TIMES THE PAST FEW WKS AND HAVE EXPERIENCED SIMILAR PROBS. THE MIA RAMP -- ESPECIALLY BTWN CONCOURSES X AND Y IS SOFT AND FULL OF RUTS AND SUNKEN IN SPOTS. IT IS ALMOST IMPOSSIBLE TO TAXI A MODERATE WT ACFT OUT OF THE TIGHT CORNERS AND STAY WITHIN THE PWR PARAMETERS IN THE OPS MANUAL. MIA SHOULD EITHER FIX THE RAMPS OR AS A STANDARD PROC TUG US FURTHER OUT ONTO THE RAMPS WHERE HIGHER BREAKAWAY PWR SETTINGS CAN SAFELY BE USED. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR STATED THAT HE HAS NOT BEEN BACK TO THE MIA ARPT SINCE HIS RPT, BUT UNDERSTANDS FROM OTHER COMPANY FLCS THAT THERE HAVE BEEN NO CHANGES TO THE RAMP CONDITION. HE FURTHER ADVISED THAT HE HAD HEARD THAT THERE WAS AN INCIDENT IN WHICH A GND CREW MEMBER WAS KNOCKED DOWN BY JET BLAST WHEN THE DEPARTING ACFT HAD TO GO ABOVE MAX COMPANY RECOMMENDED BREAKAWAY PWR IN LEAVING THE RAMP AREA. HE SAID THAT THERE IS CONSIDERABLE CONSTRUCTION GOING ON NEAR AND AROUND THE AREA AND HEARS THAT THE CONCOURSE AREAS WILL BE RESURFACED. SINCE HE REALIZES THAT IT WILL PROBABLY BE A LONG TIME BEFORE THE CONCOURSE RAMPS ARE RESURFACED, HE HOPES THE COMPANY WILL PROVIDE NOTICE TO CREWS OF HVY ACFT TO BE TUGGED OUT FAR ENOUGH FOR THE USE OF MORE BREAKAWAY PWR. THE RPTR STATED THAT HE HAS 16000 HRS TOTAL TIME: 225 HRS IN THE LAST 90 DAYS AND 900 HRS IN B757 AND B767 TYPE ACFT.
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.