A B727-200 PIC FIREWALLS THE 3 ENGS AFTER RECEIVING A STALL WARNING DURING ROTATION OFF THE RWY AT DEN; CO.

Date: 2000-06 · Aircraft: B727-200 · Phase: takeoff

Anomalies: aircraft-equipment-problem-critical

Synopsis

A B727-200 PIC FIREWALLS THE 3 ENGS AFTER RECEIVING A STALL WARNING DURING ROTATION OFF THE RWY AT DEN; CO.

Narrative

SO ON ACR FLT XXX ON JUN/SAT/00; TKOF RWY 25 AT DENVER INTL ARPT. WX WAS NOT A FACTOR. STICK SHAKER ACTIVATED AT ROTATION. V1=141 KTS; V2=152 KTS. UPON ACTIVATION OF STICK SHAKER; CAPT APPLIED MAX FIREWALL THRUST. FO CALLED AIRSPDS OUT UNTIL V2+15 KTS AT WHICH POINT THE CAPT REDUCED THRUST TO NORMAL TKOF THRUST. WE WERE AT ABOUT 300-400 FT AGL WHEN THRUST WAS REDUCED. ATTEMPTED CONTACT WITH ACR MAINT THROUGH COMMERCIAL RADIO. AFTER CIRCUIT BREAKER WAS PULLED TO SILENCE THE STALL INDICATION. AFTER SEVERAL ATTEMPTS TO CONTACT MAINT; WE FINALLY DID ABOUT 10 MINS AFTER DEP. MAINT SUGGESTED WE COULD CONTINUE THE MISSION TO OUR DEST OF ZZZ WHICH WAS IN ACCORDANCE WITH ACR MANUALS. ACFT ENGS OPERATED NORMALLY THROUGHOUT SORTIE. UPON ARR AT ZZZ; THE ACFT WAS IMPOUNDED FOR A TRIPLE ENG CHANGE. ACCORDING TO THE CHIEF ENG MECH; HE WOULD NOT HAVE ALLOWED THE ACFT TO CONTINUE TO ITS DEST; BUT BY THE TIME HE WAS CONTACTED WE WERE WITHIN 80 NM OF ZZZ. THIS ACFT HAD A HISTORY OF FALSE STICK SHAKER ACTUATIONS; SPECIFICALLY AT ALT OF FL240 ON JUN/WED/00. THERE IS NO SPECIFIC GUIDANCE FOR THIS SIT; NOR SHOULD THERE BE. MY ONLY CONCERN IS THE CREW WAS NOT TOLD ABOUT ENG CHANGES WITH LNDG AND WE WERE ALLOWED TO CONTINUE TO DEST. ACFT DID NOT SHOW ANY INDICATIONS THAT WERE ABNORMAL THROUGHOUT THE FLT. SUPPLEMENTAL INFO FROM ACN 476729: ON TKOF DURING ROTATION THE CAPT'S STALL WARNING SYS ACTIVATED. THIS HAPPENED AT APPROX 145 KTS WITH A V1/VR OF 141 KTS AND V2 OF 152 KTS. WITH STICK SHAKER ACTIVATION FIREWALL THRUST WAS APPLIED AND ROTATION WAS CONTINUED. AT APPROX 200 FT TO 400 FT WE REALIZED THIS WAS PROBABLY A FALSE WARNING AND REDUCED PWR TO TKOF PWR; AND CONTINUED THE TKOF PROFILE. AFTER PASSING APPROX 10000 FT TO 12000 FT I HAD THE SO CONTACT DISPATCH AND REQUEST A PHONE PATCH WITH LINE MAINT. AFTER DISCUSSING THE EVENT AND THE CONDITION OF THE ENGS WITH MAINT WE CONTINUED ON TO OUR DEST. ENGS OP WAS NORMAL FOR REMAINDER OF FLT. WE WERE ABLE TO STOP STALL WARNING ACTIVATION BY PULLING THE #1 STALL WARNING AC BREAKER. AFTER ARR MAINT REMOVED THE ACFT FROM SVC.

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Source: NASA Aviation Safety Reporting System (public domain). Reports are voluntary submissions and are not verified by NASA.