LOW LEVEL WIND SHEAR ENCOUNTER BY ACR FLT. ENGS OVERTEMPTED IN EVASIVE MANEUVER.
Synopsis
LOW LEVEL WIND SHEAR ENCOUNTER BY ACR FLT. ENGS OVERTEMPTED IN EVASIVE MANEUVER.
Narrative
WE PERFORMED A NORMAL TKOF. FO ROTATED ON SPD AND SETTLED ON A CLB SPD OF APPROX V2 PLUS 25. ACFT ATTITUDE EVENTUALLY REACHED 20 DEGS NOSE UP. AT APPROX 800 FT ABOVE FIELD ELEVATION; OUR AIRSPD RAPIDLY DROPPED TO ABOUT V2 PLUS 5. AT THE SAME TIME THE WIND SHEAR WARNING ACTIVATED WITH BOTH AN ORAL WARNING AND FLT DIRECTOR GUIDANCE. I STATED TO FO; 'WE HAVE A WIND SHEAR. FIREWALL THRUST!' I PUT MY HAND ON HIS THROTTLE HAND AND TOGETHER WE PUSHED THE THROTTLES TO THE FARTHEST THEY COULD GO FORWARD -- ALL THE WAY TO THE STOPS. FO KEPT FLYING THE ACFT. EVEN WITH THE ENGS GIVING US EVERYTHING THEY WERE CAPABLE OF; OUR AIRSPD HUNG AT V2 PLUS 5. WE WERE IN A SLIGHT DSCNT. I GAVE THE APPROPRIATE CALLOUTS. 'FOLLOW THE GUIDANCE. AIRSPD V2 PLUS 5. WE ARE DSNDING.' WE THEN LEVELED. OUR DSCNT WAS NEVER MORE THAN 100-200 FPM. WE USED OUR AVAILABLE ENERGY TO ARREST THE DSCNT AND THEN EVIDENTLY BURST CLR OF THE WIND SHEAR. OUR AIRSPD JUMPED TO 200 KTS IN LESS TIME THAN IT TAKES TO READ THIS SENTENCE AND OUR RATE OF CLB SHOT FROM NEGLIGIBLE TO 2200 FPM. I ASSESSED THE SIT AND TOLD FO TO PULL THE THROTTLES BACK TO CLB THRUST. HE DID SO. I CALLED BACK TO THE SAT TWR WITH A WIND SHEAR PIREP. FO PUT THE ACFT ON AUTOPLT FOR THE CLB AND WE PREPARED TO ANALYZE WHAT WE HAD JUST ENCOUNTERED. I NOTICED THE OVERHEAD ANNUNCIATOR PANEL HAD 2 CAUTIONS EVIDENT: L-GEN OFF AND L-CSD OIL PRESS LOW. I REAFFIRMED TO FO THAT HE SHOULD FLY THE ACFT AND WORK THE ATC RADIO. I GOT INTO THE ABNORMALS AND RAN THE APPROPRIATE CHKLIST FOR A FAILED GENERATOR. I TOOK THE CTLS AFTER RUNNING THAT CHKLIST AND ASKED FO TO RUN THE CSD OIL PRESSURE LOW ABNORMAL CHKLIST. THE ACFT FLEW FINE. I NOTED NO ENG ROUGHNESS OR ANY LACK OF RESPONSIVENESS. FO COORDINATED WITH OUR FLT DISPATCHER AND MAINT COORDINATOR FOR THE MAINT WRITE-UPS. WE 'PUT IT IN THE BOOK.' THE REMAINDER OF THE FLT INTO DFW WAS UNEVENTFUL. WE PARKED AT THE GATE; AND WAITED TO DISCUSS THE WRITE-UPS WITH MAINT. MAINT WANTED TO KNOW WHAT OUR EGT WAS DURING THE ENG PARAMETERS EXCEEDANCE. I TOLD THEM THAT WE WERE EXTREMELY BUSY AT THE TIME OF THE EXCEEDANCE ASSURING THE CONTINUED FLT OF THE ACFT. I NEITHER NOTICED NOR NOTED THE EGT. I DID PUSH THOSE ENGS TO THE FIREWALL STOPS ON THE THROTTLES AND THEY GAVE US EVERYTHING THEY ADVERTISE THEMSELVES CAPABLE OF. I WAS PLEASED WITH THE ENGS. MAINT WANTED TO KNOW IF I HAD EXCEEDED ANY ENG LIMIT. I SAID THAT WE HAD CERTAINLY EXCEEDED THE EPR LIMIT ON OUR GAUGES. MAINT WANTED TO KNOW WHAT OUR EPR WAS. I DID NOT KNOW. I ANSWERED; 'IT WAS WHATEVER THOSE ENGS COULD GIVE.' OUR WIND SHEAR ENCOUNTER LASTED MAYBE 20-30 SECONDS. TIME HAS A WAY OF DISTORTING WHEN ONE IS IN AN EMER SIT. I DO NOT BELIEVE WE PUSHED THOSE ENGS MUCH LONGER THAN THAT. NEITHER FO NOR I NOTICED ANY VISIBLE SIGNS THAT A WIND SHEAR WAS POSSIBLE. THERE WASN'T ANY BLOWING DUST DEVILS OR PREVIOUS WIND SHEARS RPTED TO US BY TWR OR ATIS. BUT THE WIND SHEAR WAS THERE; LURKING INVISIBLE AT 800 FT AGL. I AM PLEASED WITH THE TRAINING WE HAVE RECEIVED ON WIND SHEAR. I BELIEVE THAT THIS WAS A TEXT BOOK ENCOUNTER AND THAT WE DID EXACTLY WHAT WE WERE TRAINED TO DO. WE MANAGED OUR ENERGY AND SURVIVED THE ENCOUNTER. YOU KNOW; THE PEOPLE IN BACK NEVER EVEN KNEW THAT WE HAD BRUSHED AGAINST A POTENTIAL NIGHTMARE. THAT'S GOOD. WE DID THE JOB WE ARE PAID TO DO. THE A-LINE FLT ATTENDANT DID TELL ME SHE HAD HEARD THE WIND SHEAR ORAL FROM HER JUMPSEAT. SHE THANKED ME FOR GETTING US OUT OF THE WIND SHEAR. IT WAS NOT ME THAT SAVED US. IT WAS OUR TEAM WORKING TOGETHER. I WANT TO THANK ALL OF THE MEN AND WOMEN AT ACR AND ACFT AND THEIR VENDORS THAT CAME UP WITH THE WIND SHEAR GUIDANCE EQUIP AND THE PROCS TO USE IT. I WANT TO THANK OUR GND INSTRUCTORS FOR TEACHING US AND SIMULATOR INSTRUCTORS FOR TESTING US AND REFINING OUR TECHNIQUE. IT WORKS. SUPPLEMENTAL INFO FROM ACN 296823: THE ENGS OPERATED NORMALLY BUT WERE WRITTEN UP FOR AN INSPECTION DUE TO THE OVERBOOST. SUBSEQUENT INSPECTION DETECTED DAMAGE AND BOTH ENGS WERE REPLACED. ALL SYS AND THE PLTS OPERATED AS INTENDED DURING THIS EVENT. I HAVE NO IDEA WHETHER THE SUCCESSFUL OUTCOME WOULD HAVE BEEN ACHIEVED WITHOUT OVER- TEMPING THE ENGS AND DID NOT CONSIDER RETURNING TO SAT SINCE WE DID NOT SUSPECT ANY ENG DAMAGE.
Source: NASA Aviation Safety Reporting System (public domain). Reports are voluntary submissions and are not verified by NASA.