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Captain of corp turboprop allows aircraft to balloon 300' high when first officer selects full flaps instead of following captain's request for partial flaps, thus exceeding structural speed limit on aircraft.
| Attributes | |
| ACN | 126971 |
| Time | |
| Date | 198910 |
| Day | Tue |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : elx airport : beh |
| State Reference | MI |
| Altitude | msl bound lower : 4000 msl bound upper : 4300 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : sbn artcc : zlc |
| Operator | general aviation : corporate |
| Make Model Name | Small Transport, Low Wing, 2 Turboprop Eng |
| Flight Phase | descent : approach descent other |
| Route In Use | arrival other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | Other |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 98 flight time total : 3100 flight time type : 969 |
| ASRS Report | 126971 |
| Person 2 | |
| Affiliation | Other |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude non adherence : clearance other spatial deviation |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : overcame equipment problem flight crew : returned to intended course or assigned course |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Cleared direct to elx, descend and maintain 4000', reduce airspeed to 190 KTS initially, then back to 160 KIAS for spacing. Upon reaching 4000', called for approach flaps 'slow' and copilot selected approach flaps all at once. Disconnected autoplt and hand-flew to prevent damage to aircraft structure. In control of the aircraft, I allowed it to balloon to 4300' indicated MSL and immediately, once structural limits were met, descended to 4000'. Time at 4300' = less than 1 min. Copilot did not follow captain's request due to workload, or perhaps inattn or selective listening.
Original NASA ASRS Text
Title: CAPT OF CORP TURBOPROP ALLOWS ACFT TO BALLOON 300' HIGH WHEN FO SELECTS FULL FLAPS INSTEAD OF FOLLOWING CAPT'S REQUEST FOR PARTIAL FLAPS, THUS EXCEEDING STRUCTURAL SPEED LIMIT ON ACFT.
Narrative: CLRED DIRECT TO ELX, DSND AND MAINTAIN 4000', REDUCE AIRSPD TO 190 KTS INITIALLY, THEN BACK TO 160 KIAS FOR SPACING. UPON REACHING 4000', CALLED FOR APCH FLAPS 'SLOW' AND COPLT SELECTED APCH FLAPS ALL AT ONCE. DISCONNECTED AUTOPLT AND HAND-FLEW TO PREVENT DAMAGE TO ACFT STRUCTURE. IN CONTROL OF THE ACFT, I ALLOWED IT TO BALLOON TO 4300' INDICATED MSL AND IMMEDIATELY, ONCE STRUCTURAL LIMITS WERE MET, DSNDED TO 4000'. TIME AT 4300' = LESS THAN 1 MIN. COPLT DID NOT FOLLOW CAPT'S REQUEST DUE TO WORKLOAD, OR PERHAPS INATTN OR SELECTIVE LISTENING.
Data retrieved from NASA's ASRS site as of August 2007 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.