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Flight crewof BE99 aborted takeoff due to unsynchronized RPM. Engine run up and subsequent takeoff normal.
| Attributes | |
| ACN | 578194 |
| Time | |
| Date | 200304 |
| Day | Wed |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : abq.airport |
| State Reference | NM |
| Altitude | agl single value : 0 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Operator | common carrier : air taxi |
| Make Model Name | Beech 1900 |
| Operating Under FAR Part | Part 135 |
| Flight Phase | ground : takeoff roll |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air taxi |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 100 flight time total : 2500 flight time type : 300 |
| ASRS Report | 578194 |
| Person 2 | |
| Affiliation | company : air taxi |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 110 flight time total : 3050 flight time type : 800 |
| ASRS Report | 578568 |
| Events | |
| Anomaly | aircraft equipment problem : less severe |
| Independent Detector | aircraft equipment other aircraft equipment : eng rpm indications other flight crewa other flight crewb |
| Resolutory Action | flight crew : rejected takeoff other |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Aircraft |
| Primary Problem | Flight Crew Human Performance |
Narrative:
After right engine start, we noted a higher oil temperature and pressure than normal. Not out of limits, but we decided to keep an eye on it. Taxi was normal. When cleared for takeoff, I advanced the power levers to bring the propellers to 1700 RPM, then continued advancing the power levers as we began the takeoff roll. Soon after, we both heard a 'waa-waa' sound and I asked the first officer if the propellers were at 1700. He said that the right side was a bit low, and I glanced down to see that the right propeller gauge needle appeared to be bouncing between 1600-1650 RPM. Considering the oil indication, I decided to abort takeoff. We taxied to a quiet spot on the airport to do an engine run-up. After seeing no abnormal indications during the run-up on any engine gauge, and in fact, a slight drop in oil temperature and pressure, we decided to depart again. The flight was completed without further incident.
Original NASA ASRS Text
Title: FLT CREWOF BE99 ABORTED TKOF DUE TO UNSYNCHRONIZED RPM. ENG RUN UP AND SUBSEQUENT TKOF NORMAL.
Narrative: AFTER R ENG START, WE NOTED A HIGHER OIL TEMP AND PRESSURE THAN NORMAL. NOT OUT OF LIMITS, BUT WE DECIDED TO KEEP AN EYE ON IT. TAXI WAS NORMAL. WHEN CLRED FOR TKOF, I ADVANCED THE PWR LEVERS TO BRING THE PROPS TO 1700 RPM, THEN CONTINUED ADVANCING THE PWR LEVERS AS WE BEGAN THE TKOF ROLL. SOON AFTER, WE BOTH HEARD A 'WAA-WAA' SOUND AND I ASKED THE FO IF THE PROPS WERE AT 1700. HE SAID THAT THE R SIDE WAS A BIT LOW, AND I GLANCED DOWN TO SEE THAT THE R PROP GAUGE NEEDLE APPEARED TO BE BOUNCING BTWN 1600-1650 RPM. CONSIDERING THE OIL INDICATION, I DECIDED TO ABORT TKOF. WE TAXIED TO A QUIET SPOT ON THE ARPT TO DO AN ENG RUN-UP. AFTER SEEING NO ABNORMAL INDICATIONS DURING THE RUN-UP ON ANY ENG GAUGE, AND IN FACT, A SLIGHT DROP IN OIL TEMP AND PRESSURE, WE DECIDED TO DEPART AGAIN. THE FLT WAS COMPLETED WITHOUT FURTHER INCIDENT.
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.