1999-05 · NASA ASRS report 436374
A B727 FREIGHTER ABORTS ITS LOW SPD TKOF WHEN #2 ENG SURGES DUE TO THE XWINDS AT RNO; NV.
SCHEDULED CARGO FLT FROM RNO TO OAK. WX AT DEP TIME WAS RPTED AS FOLLOWS: XA56Z 270 DEGS 20 KTS GUSTING TO 25 KTS; 10 SM; SCATTERED 055; 08/M03 ALTIMETER 29.78. LOW LEVEL WINDSHEAR RPTED IN THE AREA. WE WERE CLRED INTO POS AND HOLD RWY 34L. WE HELD FOR BTWN 1-2 MINS FOR TFC TO CLR THE RWY; AND WERE THEN CLRED FOR TKOF. WITH THE BRAKES APPLIED; I INITIALLY ADVANCED THE PWR SLOWLY IN AN ATTEMPT TO PRECLUDE SURGING IN THE #2 ENG (A KNOWN CONSEQUENCE OF HIGH XWINDS AND LOW ACFT SPD IN THE B727). I HEARD A NOISE JUST BEFORE THE PWR WAS STABILIZED; BUT SAW NOTHING ON THE ENG GAUGES AND THOUGHT THE SO HAD DROPPED SOMETHING (HE HAD NOT). AFTER THE PWR WAS STABILIZED AT 1.4 EPR; I RELEASED THE BRAKES WHILE I STARTED TO ADVANCE THE THROTTLES TO TKOF PWR. IMMEDIATELY AFTER MOVING THE THROTTLES FORWARD FROM 1.4 EPR; THE #2 ENG SURGED. I SAW THE FLUCTUATION IN EGT. I RECOGNIZED THE SURGING AS BEING DUE TO THE XWINDS; AND CLOSED THE THROTTLES. WE DID NOT EVEN REACH TAXI SPD ON THE TKOF ROLL; AND CLRED THE RWY AT TXWY Q; THE FIRST TURNOFF. OUR PROCS DID NOT REQUIRE A LOGBOOK ENTRY SINCE OUR SPD WAS BELOW 70 KTS; AND SINCE WE KNEW THE SURGING WAS CAUSED BY DISRUPTED AIRFLOW; WE FELT NO MAINT WAS REQUIRED. AFTER CLRING THE RWY; WE DISCUSSED ADDITIONAL TECHNIQUES OUTLINED IN OUR ACFT MANUAL THAT WE COULD USE TO HANDLE THE XWIND/SURGE. AFTER WE WERE RECLRED FOR TKOF; WE USED ALL OF THE TECHNIQUES AND HAD A NORMAL DEP. THE FO LATER RPTED HE HAD SEEN A SURGE OF THE #2 ENG WHEN I THOUGHT THE SO HAD DROPPED SOMETHING. HIS TIMELY IDENT OF WHAT HE HAD SEEN AND MY PROMPT RECOGNITION OF THE SIT WOULD HAVE KEPT ME FROM INCREASING PWR TO THE #2 ENG UNTIL WE HAD SIGNIFICANT FORWARD MOTION. WHILE I WAS PREPARED FOR THE XWIND; IN TERMS OF SLOW INITIAL THROTTLE MOVEMENT; I WAS NOT PREPARED FOR THE FACT THAT I MAY HAVE HAD TO USE MORE THAN ONE STRATEGY. IN THE FUTURE. I THINK PLANNING ON USING A COMBINATION OF ALL TECHNIQUES WOULD BE APPROPRIATE; SO AS TO MINIMIZE THE CHANCES OF HAVING ANOTHER OCCURRENCE OF THIS NATURE.
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Source: NASA Aviation Safety Reporting System (public domain). Reports are voluntary submissions and are not verified by NASA.
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