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A B737-300 pilot distracted by yaw and vibration following a catastrophic engine failure deviated from the assigned altitude during an approach.
| Attributes | |
| ACN | 762202 |
| Time | |
| Date | 200711 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | msl bound lower : 2700 msl bound upper : 3000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : zzz.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | B737-300 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : approach |
| Route In Use | arrival : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Experience | flight time last 90 days : 213 flight time type : 18000 |
| ASRS Report | 762202 |
| Events | |
| Anomaly | aircraft equipment problem : critical altitude deviation : excursion from assigned altitude non adherence : clearance |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : declared emergency flight crew : landed in emergency condition flight crew : returned to assigned altitude |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Aircraft |
| Primary Problem | Aircraft |
Narrative:
Approaching ZZZ1 for emergency landing; we were told to maintain 3000 ft. I was flying and beginning to slow the aircraft to configure for landing after a catastrophic engine failure at FL250. As we were putting down flaps and slowing to flaps 15 degree landing speed; I accidentally descended to 2700 ft. As the first officer brought it to my attention; I tried to climb back to 3000 ft but approach control then told us to descend to 2500 ft. Landing was normal and flight was concluded. I could have paid a little more attention to altitude but with major vibration and yaw problems associated with the #2 engine damage; we were worried more about the way the aircraft would react when gear and flaps were to be extended.
Original NASA ASRS Text
Title: A B737-300 PILOT DISTRACTED BY YAW AND VIBRATION FOLLOWING A CATASTROPHIC ENG FAILURE DEVIATED FROM THE ASSIGNED ALT DURING AN APCH.
Narrative: APCHING ZZZ1 FOR EMER LNDG; WE WERE TOLD TO MAINTAIN 3000 FT. I WAS FLYING AND BEGINNING TO SLOW THE ACFT TO CONFIGURE FOR LNDG AFTER A CATASTROPHIC ENG FAILURE AT FL250. AS WE WERE PUTTING DOWN FLAPS AND SLOWING TO FLAPS 15 DEG LNDG SPD; I ACCIDENTALLY DSNDED TO 2700 FT. AS THE FO BROUGHT IT TO MY ATTN; I TRIED TO CLB BACK TO 3000 FT BUT APCH CTL THEN TOLD US TO DSND TO 2500 FT. LNDG WAS NORMAL AND FLT WAS CONCLUDED. I COULD HAVE PAID A LITTLE MORE ATTN TO ALT BUT WITH MAJOR VIBRATION AND YAW PROBS ASSOCIATED WITH THE #2 ENG DAMAGE; WE WERE WORRIED MORE ABOUT THE WAY THE ACFT WOULD REACT WHEN GEAR AND FLAPS WERE TO BE EXTENDED.
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.