ACR LGT NON ADHERENCE TO ATC CLRNC. SPEED DEVIATION ALT DEVIATION CROSSING RESTRICTION NOT MET.

1988-07 · NASA ASRS report 91426

Date: 1988-07 · Aircraft: Large Transport; Low Wing; 3 Turbojet Eng

Anomalies: deviation-altitude-undershoot|deviation-altitude-crossing-restriction-not-met|deviation-speed-all-types|deviation-discrepancy-procedural-clearance|inflight-event-encounter-weather-turbulence

Synopsis

ACR LGT NON ADHERENCE TO ATC CLRNC. SPEED DEVIATION ALT DEVIATION CROSSING RESTRICTION NOT MET.

Narrative

ARRIVING DEN VIA THE PROFILE DSCNT ROUTE OVER THE DRAKO FIX. WE WERE CLRED TO CROSS DRAKO AT 17000'. DSCNT WAS DELAYED TO AVOID TSTM BUILDUPS ALONG THE ROUTE AND SUBSEQUENTLY WE CROSSED THE FIX ABOUT 3000' HIGH. ACTUALLY NOT OVER THE FIX; BUT WITH WX AVOIDANCE AND A VECTOR FROM ATC; WE WERE AT THE FIX DME ARC DISTANCE ABOUT 3000' HIGH. WE WERE AVOIDING THE BUILDUPS TOTALLY BECAUSE OF PREVIOUS RPTS OF MODERATE TURB ALONG THE ARR ROUTE. THE RADIO CHATTER GOT BUSY AT THE LAST MOMENTS WHEN IT WAS OBVIOUS WE WOULD BE HIGH AT THE FIX; SO WERE UNABLE TO INFORM ATC UNTIL THE LAST SECS BEFORE HDOF TO DEN APCH CTL. SUPPLEMENTAL INFO FROM ACN 91214: HE HAD ME (PNF) TELL ATC WE WOULD DELAY STARTING DOWN DUE TO WX. ATC SAID OK; BUT MAKE THE RESTRICTION. CAPT DELAYED AND DELAYED AND I TOLD HIM WE WEREN'T GOING TO MAKE THE RESTRICTION. HE SAID IT WOULD BE OK. I ASKED HIM IF I SHOULD TELL ATC IF WE WOULD BE HIGH AT DRAKO. HE SAID; 'NO; IT'LL BE FINE.' WE CROSSED DRAKO AT 24000' AND 280 KTS. SUPPLEMENTAL INFO FROM ACN 91213: I NOTICED THAT THE COPLT ASKED THE CAPT IF HE COULD MAKE THE RESTRICTION. HE SAID; 'YES; NO PROB.' THE NEXT THING I KNEW WAS THAT WE WERE AT DRAKO AT 24000' AND 290 KTS.

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

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