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Flap warning horn sounded when power advanced. Banged on speed brake handle and advanced power again. Horn did not sound, so proceeded normally.
| Attributes | |
| ACN | 138370 |
| Time | |
| Date | 199003 |
| Day | Sat |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : iad |
| State Reference | VA |
| Altitude | agl bound lower : 0 agl bound upper : 0 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | climbout : takeoff |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : instrument pilot : flight engineer pilot : atp pilot : commercial |
| Experience | flight time last 90 days : 150 flight time total : 12000 flight time type : 1000 |
| ASRS Report | 138370 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : flight engineer pilot : instrument pilot : commercial |
| Experience | controller military : 13 controller radar : 14 flight time last 90 days : 150 flight time total : 4000 flight time type : 50 |
| ASRS Report | 138375 |
| Events | |
| Anomaly | aircraft equipment problem : less severe |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : overcame equipment problem |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
Narrative:
Received spurious takeoff warning as EPR came up to 1.6 on takeoff at iad. All flight controls (flaps, south/B and trim) set correctly (5 degree flaps, 5.2 trim, south/B in detent). Cycled south/B and banged top of south/B lever. Advanced power again. Horn didn't come on. Since we were still in normal position for takeoff (rolled approximately 20' on first attempt) continued takeoff normally. Seems to be a trend of these spurious warnings (6 in the last yr).
Original NASA ASRS Text
Title: FLAP WARNING HORN SOUNDED WHEN PWR ADVANCED. BANGED ON SPEED BRAKE HANDLE AND ADVANCED POWER AGAIN. HORN DID NOT SOUND, SO PROCEEDED NORMALLY.
Narrative: RECEIVED SPURIOUS TKOF WARNING AS EPR CAME UP TO 1.6 ON TKOF AT IAD. ALL FLT CONTROLS (FLAPS, S/B AND TRIM) SET CORRECTLY (5 DEG FLAPS, 5.2 TRIM, S/B IN DETENT). CYCLED S/B AND BANGED TOP OF S/B LEVER. ADVANCED PWR AGAIN. HORN DIDN'T COME ON. SINCE WE WERE STILL IN NORMAL POS FOR TKOF (ROLLED APPROX 20' ON FIRST ATTEMPT) CONTINUED TKOF NORMALLY. SEEMS TO BE A TREND OF THESE SPURIOUS WARNINGS (6 IN THE LAST YR).
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.