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A taylorcraft L-2 aircraft's engine; on initial climb-out after takeoff; began to gradually lose power. Flapper valve in carburetor air box was broken in two. Emergency declared.
| Attributes | |
| ACN | 749971 |
| Time | |
| Date | 200708 |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 400 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : zzz.tower |
| Operator | general aviation : instructional |
| Make Model Name | Small Aircraft Low Wing 1 Eng Fixed Gear |
| Operating Under FAR Part | Part 91 |
| Flight Phase | climbout : takeoff |
| Flight Plan | None |
| Person 1 | |
| Affiliation | other |
| Function | instruction : instructor |
| Qualification | pilot : cfi pilot : commercial pilot : instrument |
| Experience | flight time last 90 days : 150 flight time total : 900 flight time type : 100 |
| ASRS Report | 749971 |
| Events | |
| Anomaly | aircraft equipment problem : critical other anomaly other |
| Independent Detector | other flight crewa |
| Consequence | other Other |
| Supplementary | |
| Problem Areas | Aircraft |
| Primary Problem | Aircraft |
Narrative:
On initial climb out after takeoff; engine began gradual loss of power. Upon my command; the student applied carburetor heat. Engine lost further RPM with carburetor heat and after approximately 10-15 seconds; it was put back into the cold position. Engine continued to lose power and airplane could not maintain altitude. I was unable to make the airport; and was forced to perform an emergency landing on the adjacent road. No injuries to any person and no damage to any property was sustained. Before the flight; all of the airplane system performed satisfactory during the run-up check. After the emergency landing; it was discovered that the flapper valve in the carburetor air box was broken in 2.
Original NASA ASRS Text
Title: A TAYLORCRAFT L-2 ACFT'S ENG; ON INITIAL CLIMB-OUT AFTER TKOF; BEGAN TO GRADUALLY LOSE POWER. FLAPPER VALVE IN CARB AIR BOX WAS BROKEN IN TWO. EMERGENCY DECLARED.
Narrative: ON INITIAL CLBOUT AFTER TKOF; ENG BEGAN GRADUAL LOSS OF PWR. UPON MY COMMAND; THE STUDENT APPLIED CARB HEAT. ENG LOST FURTHER RPM WITH CARB HEAT AND AFTER APPROX 10-15 SECONDS; IT WAS PUT BACK INTO THE COLD POS. ENG CONTINUED TO LOSE PWR AND AIRPLANE COULD NOT MAINTAIN ALT. I WAS UNABLE TO MAKE THE ARPT; AND WAS FORCED TO PERFORM AN EMER LNDG ON THE ADJACENT ROAD. NO INJURIES TO ANY PERSON AND NO DAMAGE TO ANY PROPERTY WAS SUSTAINED. BEFORE THE FLT; ALL OF THE AIRPLANE SYS PERFORMED SATISFACTORY DURING THE RUN-UP CHK. AFTER THE EMER LNDG; IT WAS DISCOVERED THAT THE FLAPPER VALVE IN THE CARB AIR BOX WAS BROKEN IN 2.
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.