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The problem that the reporter is referencing is some level of variation in the frequency and phase of alternating current output. AC output from differing sources must remain in phase when paralleled, or damage and loss of electrical capability may result.
| Attributes | |
| ACN | 264235 |
| Time | |
| Date | 199402 |
| Day | Thu |
| Local Time Of Day | 0001 To 0600 |
| Place | |
| Locale Reference | airport : bos |
| State Reference | MA |
| Altitude | agl bound lower : 0 agl bound upper : 0 |
| Environment | |
| Flight Conditions | IMC |
| Light | Night |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | climbout : takeoff other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : second officer |
| Qualification | pilot : flight engineer pilot : cfi pilot : atp |
| ASRS Report | 264235 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | aircraft equipment problem : less severe |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | aircraft : equipment problem dissipated flight crew : rejected takeoff |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
Narrative:
Upon being cleared for takeoff in bos in icing conditions the captain set takeoff thrust and I noticed the B-727-100 kilowatt meters wavering abnormally. I called the condition out to the crew immediately and prior to brake release. The captain elected to turn off the runway and after approximately 5 mins, elected to conduct the takeoff as the kilowatt meters settled and paralleled. Maintenance was not notified in bos and the flight was conducted without incident. I believe even though a maintenance problem did not exist, the crew should have called maintenance control anyway in the interest of flight safety.
Original NASA ASRS Text
Title: THE PROB THAT THE RPTR IS REFING IS SOME LEVEL OF VARIATION IN THE FREQ AND PHASE OF ALTERNATING CURRENT OUTPUT. AC OUTPUT FROM DIFFERING SOURCES MUST REMAIN IN PHASE WHEN PARALLELED, OR DAMAGE AND LOSS OF ELECTRICAL CAPABILITY MAY RESULT.
Narrative: UPON BEING CLRED FOR TKOF IN BOS IN ICING CONDITIONS THE CAPT SET TKOF THRUST AND I NOTICED THE B-727-100 KILOWATT METERS WAVERING ABNORMALLY. I CALLED THE CONDITION OUT TO THE CREW IMMEDIATELY AND PRIOR TO BRAKE RELEASE. THE CAPT ELECTED TO TURN OFF THE RWY AND AFTER APPROX 5 MINS, ELECTED TO CONDUCT THE TKOF AS THE KILOWATT METERS SETTLED AND PARALLELED. MAINT WAS NOT NOTIFIED IN BOS AND THE FLT WAS CONDUCTED WITHOUT INCIDENT. I BELIEVE EVEN THOUGH A MAINT PROB DID NOT EXIST, THE CREW SHOULD HAVE CALLED MAINT CTL ANYWAY IN THE INTEREST OF FLT SAFETY.
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.