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A C172 flight instructor reported a loss of throttle control in a mid-range setting. A return to the departure airport was initiated where the mixture was pulled to cutoff on downwind and a successful landing was made.
| Attributes | |
| ACN | 1352816 |
| Time | |
| Date | 201605 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Skyhawk 172/Cutlass 172 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | Cruise |
| Route In Use | None |
| Flight Plan | None |
| Component | |
| Aircraft Component | Throttle/Power Lever |
| Person 1 | |
| Function | Instructor Pilot Flying |
| Qualification | Flight Crew Commercial Flight Crew Flight Instructor Flight Crew Multiengine Flight Crew Instrument |
| Experience | Flight Crew Last 90 Days 100 Flight Crew Total 1215 Flight Crew Type 900 |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical Deviation - Procedural Maintenance Deviation - Procedural Published Material / Policy |
Narrative:
I was acting as pilot in command; as a flight instructor; in a cessna 172. I was providing private pilot flight instruction to a student pilot. At that time I was approximately 15 miles to the southeast of [home airport] at 4500ft MSL.I had control of the aircraft and was demonstrating a stall maneuver; when upon recovery I pushed the throttle control knob full forward; but noticed that the engine RPM did not increase beyond 2000 RPM. I attempted to troubleshoot the problem and noticed that the throttle control knob would not increase or decrease the engine RPM. The throttle was stuck at 2000 RPM. I turned the plane back towards [home airport] and began a descent. [Another small airport] was closer; but since I still had power; I decided to return to [the home airport] for the longer; wider runway with a control tower. I [advised ATC] and informed them of the stuck throttle. I proceeded to the airport in a descent; and was cleared for landing once I arrived overhead. Once I was abeam the landing runway I had to pull the mixture control to idle/cutoff to shut off the engine. I then continued my descent and landed without power. I was able to continue; without power; off of the runway; onto taxiway; where I stopped awaiting a tug to remove the plane from the taxiway. I was later present when [the FBO manager] removed the plane's cowling to determine the problem. I noted that the throttle control cable was completely removed from the throttle lever. I was then informed that maintenance was just performed on this plane in which the throttle cable would have been removed from the throttle. My flight was the first flight since the maintenance was performed. Prior to takeoff I conducted a preflight inspection; and run-up; and was not able to detect any malfunction. During the takeoff roll and climb-out the plane; and throttle control; performed as normal. I believe the connector holding the throttle cable to the throttle body came off during flight.
Original NASA ASRS Text
Title: A C172 flight instructor reported a loss of throttle control in a mid-range setting. A return to the departure airport was initiated where the mixture was pulled to cutoff on downwind and a successful landing was made.
Narrative: I was acting as Pilot in Command; as a flight instructor; in a Cessna 172. I was providing private pilot flight instruction to a student pilot. At that time I was approximately 15 miles to the southeast of [home airport] at 4500ft MSL.I had control of the aircraft and was demonstrating a stall maneuver; when upon recovery I pushed the throttle control knob full forward; but noticed that the engine RPM did not increase beyond 2000 RPM. I attempted to troubleshoot the problem and noticed that the Throttle control knob would not increase or decrease the engine RPM. The throttle was stuck at 2000 RPM. I turned the plane back towards [home airport] and began a descent. [Another small airport] was closer; but since I still had power; I decided to return to [the home airport] for the longer; wider runway with a control tower. I [advised ATC] and informed them of the stuck throttle. I proceeded to the airport in a descent; and was cleared for landing once I arrived overhead. Once I was abeam the landing runway I had to pull the mixture control to idle/cutoff to shut off the engine. I then continued my descent and landed without power. I was able to continue; without power; off of the runway; onto taxiway; where I stopped awaiting a tug to remove the plane from the taxiway. I was later present when [the FBO manager] removed the plane's cowling to determine the problem. I noted that the throttle control cable was completely removed from the throttle lever. I was then informed that maintenance was just performed on this plane in which the throttle cable would have been removed from the throttle. My flight was the first flight since the maintenance was performed. Prior to takeoff I conducted a preflight inspection; and run-up; and was not able to detect any malfunction. During the takeoff roll and climb-out the plane; and throttle control; performed as normal. I believe the connector holding the throttle cable to the throttle body came off during flight.
Data retrieved from NASA's ASRS site 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.