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Air carrier flight crew reports overspd during descent into sea while attempting to set up runway change.
| Attributes | |
| ACN | 765306 |
| Time | |
| Date | 200712 |
| Local Time Of Day | 0001 To 0600 |
| Place | |
| Locale Reference | airport : sea.airport |
| State Reference | WA |
| Altitude | msl single value : 11000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tracon : s46.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | ils localizer only : 16l |
| Flight Phase | descent : approach |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| ASRS Report | 765306 |
| Events | |
| Anomaly | non adherence : company policies non adherence : far other anomaly |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : regained aircraft control |
| Supplementary | |
| Problem Areas | Aircraft Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
Narrative:
Descent into sea given heading to bypass olm and fourt and descent to 10000 ft MSL. Passing 12000 ft MSL in steep descent at 320 KIAS approaching fourt; sea approach announced runway 16C closing; expect ILS runway 16L. I went heads down to get out runway 16L ILS approach plates and neglected to mind the store; and as we passed about 11000 ft MSL we had an overspd disconnect and I looked up to see the airspeed approaching 340 KIAS limit. I disconnected autoplt and autothrottles began a leveloff to control the airspeed; but the airspeed reached 348 KIAS and was in an overspd condition above 340 KIAS for about 5 seconds. It was my fault. I should have xferred control to the first officer while I got my approach plate out. I observed him changing the approach in the FMC; and rather than wait for him to finish; I went ahead and went heads down to get my plate out; and stopped paying attention to the airplane. Inadvertent 8 KIAS overspd for 5 seconds (348 KIAS at 11000 ft MSL.)
Original NASA ASRS Text
Title: ACR FLT CREW REPORTS OVERSPD DURING DESCENT INTO SEA WHILE ATTEMPTING TO SET UP RWY CHANGE.
Narrative: DSCNT INTO SEA GIVEN HDG TO BYPASS OLM AND FOURT AND DSCNT TO 10000 FT MSL. PASSING 12000 FT MSL IN STEEP DSCNT AT 320 KIAS APCHING FOURT; SEA APCH ANNOUNCED RWY 16C CLOSING; EXPECT ILS RWY 16L. I WENT HEADS DOWN TO GET OUT RWY 16L ILS APCH PLATES AND NEGLECTED TO MIND THE STORE; AND AS WE PASSED ABOUT 11000 FT MSL WE HAD AN OVERSPD DISCONNECT AND I LOOKED UP TO SEE THE AIRSPD APCHING 340 KIAS LIMIT. I DISCONNECTED AUTOPLT AND AUTOTHROTTLES BEGAN A LEVELOFF TO CTL THE AIRSPD; BUT THE AIRSPD REACHED 348 KIAS AND WAS IN AN OVERSPD CONDITION ABOVE 340 KIAS FOR ABOUT 5 SECONDS. IT WAS MY FAULT. I SHOULD HAVE XFERRED CTL TO THE FO WHILE I GOT MY APCH PLATE OUT. I OBSERVED HIM CHANGING THE APCH IN THE FMC; AND RATHER THAN WAIT FOR HIM TO FINISH; I WENT AHEAD AND WENT HEADS DOWN TO GET MY PLATE OUT; AND STOPPED PAYING ATTN TO THE AIRPLANE. INADVERTENT 8 KIAS OVERSPD FOR 5 SECONDS (348 KIAS AT 11000 FT MSL.)
Data retrieved from NASA's ASRS site as of January 2009 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.