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Dhc-8 first officer report on a #1 propeller going in and out of automatic feather position 2 times on initial climb out from den, co.
| Attributes | |
| ACN | 591815 |
| Time | |
| Date | 200308 |
| Day | Wed |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : den.airport |
| Altitude | agl single value : 200 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : d01.tracon tower : den.tower |
| Operator | common carrier : charter |
| Make Model Name | Dash 8-200 |
| Operating Under FAR Part | Part 135 |
| Flight Phase | climbout : takeoff |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : charter |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : cfi pilot : instrument pilot : multi engine |
| Experience | flight time last 90 days : 180 flight time total : 1420 flight time type : 1000 |
| ASRS Report | 591815 |
| Person 2 | |
| Affiliation | company : charter |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | aircraft equipment problem : critical other anomaly other |
| Independent Detector | other flight crewa other flight crewb |
| Resolutory Action | flight crew : overcame equipment problem flight crew : returned to original clearance flight crew : returned to intended or assigned course other |
| Consequence | other other |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Aircraft Company |
| Primary Problem | Aircraft |
Narrative:
Immediately following takeoff (approximately 200 ft AGL) the #1 propeller cycled into feathered position then returned back to normal takeoff propeller setting of 1200 RPM. This cycle lasted only a few seconds and the PNF was able to retard the #1 power lever to avoid high torque on the engine. A few seconds after the propeller returned to normal, the propeller cycled into and out of feather a second time. With the lower power setting, the yaw was less noticeable and high torque was avoided. The propeller returned to normal (1200 RPM) and no more cycles were experienced. The appropriate checklists were run, and the company's maintenance personnel were contacted. The propeller was ctlable with the condition levers so the crew made the decision to allow the engine to continue operating. A safe landing was made and no other problems were experienced. Indications show that engine limitations were not exceeded.
Original NASA ASRS Text
Title: DHC-8 FO RPT ON A #1 PROP GOING IN AND OUT OF AUTO FEATHER POS 2 TIMES ON INITIAL CLBOUT FROM DEN, CO.
Narrative: IMMEDIATELY FOLLOWING TKOF (APPROX 200 FT AGL) THE #1 PROP CYCLED INTO FEATHERED POS THEN RETURNED BACK TO NORMAL TKOF PROP SETTING OF 1200 RPM. THIS CYCLE LASTED ONLY A FEW SECONDS AND THE PNF WAS ABLE TO RETARD THE #1 PWR LEVER TO AVOID HIGH TORQUE ON THE ENG. A FEW SECONDS AFTER THE PROP RETURNED TO NORMAL, THE PROP CYCLED INTO AND OUT OF FEATHER A SECOND TIME. WITH THE LOWER PWR SETTING, THE YAW WAS LESS NOTICEABLE AND HIGH TORQUE WAS AVOIDED. THE PROP RETURNED TO NORMAL (1200 RPM) AND NO MORE CYCLES WERE EXPERIENCED. THE APPROPRIATE CHKLISTS WERE RUN, AND THE COMPANY'S MAINT PERSONNEL WERE CONTACTED. THE PROP WAS CTLABLE WITH THE CONDITION LEVERS SO THE CREW MADE THE DECISION TO ALLOW THE ENG TO CONTINUE OPERATING. A SAFE LNDG WAS MADE AND NO OTHER PROBS WERE EXPERIENCED. INDICATIONS SHOW THAT ENG LIMITATIONS WERE NOT EXCEEDED.
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.