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The instructor and the owner pulled the landing gear warning circuit breaker during some practice single engine maneuvers and forgot to reset the circuit breaker and landed gear up.
| Attributes | |
| ACN | 325913 |
| Time | |
| Date | 199601 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : f29 |
| State Reference | OK |
| Altitude | agl bound lower : 0 agl bound upper : 0 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | general aviation : personal |
| Make Model Name | Small Aircraft, Low Wing, 2 Eng, Retractable Gear |
| Flight Phase | landing other |
| Flight Plan | None |
| Person 1 | |
| Affiliation | Other |
| Function | observation : observer |
| Qualification | pilot : cfi pilot : instrument pilot : commercial |
| Experience | flight time last 90 days : 275 flight time total : 625 flight time type : 8 |
| ASRS Report | 325913 |
| Person 2 | |
| Affiliation | Other |
| Function | flight crew : single pilot |
| Qualification | pilot : private |
| Events | |
| Anomaly | non adherence : far non adherence : published procedure other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : detected after the fact other |
| Consequence | other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Earlier in the flight I had pulled out the circuit breaker that controled the gear warning horn while practicing single engine maneuvers. After completion of these maneuvers the circuit breaker was restored to its normal position. The owner then wanted to practice single engine approachs after feathering, securing, and restarting 1 engine. After restarting the feathered engine the owner simulated losing an engine by pulling the right throttle to idle. Then he simulated feathering the engine by adjusting the throttle to zero thrust. This again caused the gear warning horn to sound. The owner then instructed me to pull the circuit breaker out. I did so. He continued the approach and once landing had been assured he lowered 1 notch of flaps and the gear. On short final neither one of us verified 3 green lights. The mistake was not realized until it was too late. On the ground I realized that the circuit breaker was still pulled and that it controled the entire landing gear system. This was a fact I should have been aware of before the flight. Although I did read the manual prior to the flight, I did not even think about the gear system. In the final phases I should have verified 3 green lights.
Original NASA ASRS Text
Title: THE INSTRUCTOR AND THE OWNER PULLED THE LNDG GEAR WARNING CIRCUIT BREAKER DURING SOME PRACTICE SINGLE ENG MANEUVERS AND FORGOT TO RESET THE CIRCUIT BREAKER AND LANDED GEAR UP.
Narrative: EARLIER IN THE FLT I HAD PULLED OUT THE CIRCUIT BREAKER THAT CTLED THE GEAR WARNING HORN WHILE PRACTICING SINGLE ENG MANEUVERS. AFTER COMPLETION OF THESE MANEUVERS THE CIRCUIT BREAKER WAS RESTORED TO ITS NORMAL POS. THE OWNER THEN WANTED TO PRACTICE SINGLE ENG APCHS AFTER FEATHERING, SECURING, AND RESTARTING 1 ENG. AFTER RESTARTING THE FEATHERED ENG THE OWNER SIMULATED LOSING AN ENG BY PULLING THE R THROTTLE TO IDLE. THEN HE SIMULATED FEATHERING THE ENG BY ADJUSTING THE THROTTLE TO ZERO THRUST. THIS AGAIN CAUSED THE GEAR WARNING HORN TO SOUND. THE OWNER THEN INSTRUCTED ME TO PULL THE CIRCUIT BREAKER OUT. I DID SO. HE CONTINUED THE APCH AND ONCE LNDG HAD BEEN ASSURED HE LOWERED 1 NOTCH OF FLAPS AND THE GEAR. ON SHORT FINAL NEITHER ONE OF US VERIFIED 3 GREEN LIGHTS. THE MISTAKE WAS NOT REALIZED UNTIL IT WAS TOO LATE. ON THE GND I REALIZED THAT THE CIRCUIT BREAKER WAS STILL PULLED AND THAT IT CTLED THE ENTIRE LNDG GEAR SYS. THIS WAS A FACT I SHOULD HAVE BEEN AWARE OF BEFORE THE FLT. ALTHOUGH I DID READ THE MANUAL PRIOR TO THE FLT, I DID NOT EVEN THINK ABOUT THE GEAR SYS. IN THE FINAL PHASES I SHOULD HAVE VERIFIED 3 GREEN LIGHTS.
Data retrieved from NASA's ASRS site as of July 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.