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An sf-340 flight crew experienced high itt on both engines in descent after the first officer did not position the ctot switches properly.
| Attributes | |
| ACN | 863384 |
| Time | |
| Date | 200912 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Aircraft 1 | |
| Make Model Name | SF 340B |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Cruise |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Turbine Engine |
| Person 1 | |
| Function | First Officer Pilot Flying |
| Qualification | Flight Crew Commercial |
| Experience | Flight Crew Last 90 Days 1 Flight Crew Total 1700 Flight Crew Type 1000 |
| Person 2 | |
| Function | Pilot Not Flying Captain |
| Qualification | Flight Crew Commercial |
| Experience | Flight Crew Last 90 Days 11 Flight Crew Total 4000 Flight Crew Type 2000 |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical Deviation - Procedural Published Material / Policy |
Narrative:
Just prior to initiating a descent; I asked the captain if he would take the radios so I could start on my descent checklist and address the passengers in the back regarding weather and field conditions. As I was proceeding with the rest of the items on the descent checklist; the captain tuned 5000 ft on the altitude preselector. As he was about to start the descent I gave him the V speeds for landing; and dialed up the constant torque on take-off (ctot)/automatic power reserve (apr). Right after this is when the captain noticed that there seemed to have been an increase in temperature and torque. Right as we both realized something un-commanded occurred; the captain realized that the ctot/apr switch was still on the on position. Soon after realizing the captain immediately performed the corrective action. The engine immediately responded to his power lever decrease and all engine parameters were totally normal for the remainder of the flight and we landed without incident. I realize the un-commanded temperature and torque increase happened due to my improperly performing the after takeoff check. I thought I had switched the ctot/apr switch all the way off but only clicked it one position down rather than two. Even though I feel I was and will be careful performing each function in the checklist; next time I perform a descent checklist and am about to dial the ctot/apr up; I will make sure once again that it is in the off position.
Original NASA ASRS Text
Title: An SF-340 Flight Crew experienced high ITT on both engines in descent after the FO did not position the CTOT switches properly.
Narrative: Just prior to initiating a descent; I asked the Captain if he would take the radios so I could start on my descent checklist and address the passengers in the back regarding weather and field conditions. As I was proceeding with the rest of the items on the descent checklist; the Captain tuned 5000 ft on the altitude preselector. As he was about to start the descent I gave him the V speeds for landing; and dialed up the Constant Torque On Take-off (CTOT)/Automatic Power Reserve (APR). Right after this is when the Captain noticed that there seemed to have been an increase in temperature and torque. Right as we both realized something un-commanded occurred; the Captain realized that the CTOT/APR switch was still on the ON position. Soon after realizing the Captain immediately performed the corrective action. The engine immediately responded to his power lever decrease and all engine parameters were totally normal for the remainder of the flight and we landed without incident. I realize the un-commanded temperature and torque increase happened due to my improperly performing the after takeoff check. I thought I had switched the CTOT/APR switch all the way off but only clicked it one position down rather than two. Even though I feel I was and will be careful performing each function in the checklist; next time I perform a descent checklist and am about to dial the CTOT/APR up; I will make sure once again that it is in the OFF position.
Data retrieved from NASA's ASRS site as of April 2012 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.