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Air carrier medium large transport got a takeoff warning horn as thrust levers were advanced. After abort the flight crew recycled the items covered by the warning horn taxied back and made a normal takeoff. Reporter not sure if 1 degree of flap had been set of 5 degrees as required.
| Attributes | |
| ACN | 169357 |
| Time | |
| Date | 199101 |
| Day | Tue |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : cmh |
| State Reference | OH |
| Altitude | agl bound lower : 0 agl bound upper : 0 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other Other |
| Flight Phase | climbout : takeoff other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : flight engineer pilot : atp pilot : commercial |
| Experience | flight time last 90 days : 200 flight time total : 6000 flight time type : 1500 |
| ASRS Report | 169357 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | non adherence : far non adherence : published procedure other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified |
| Resolutory Action | flight crew : rejected takeoff |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
| Situations | |
| Publication | Unspecified |
Narrative:
On application of takeoff power, takeoff warning horn sounded. Checked position of flaps, led's, stabilizer and speed brake. Noticed no irregularities. Aborted takeoff. No airspeed had registered. Taxied clear of runway. Cycled previously mentioned items. Checked takeoff warning horn with power application. No horn. Taxi back and commenced normal uneventful takeoff. After review of situation we (both pilots) were unsure of flaps being 1 or 5 degrees. The checklist is generic for both medium large transport type 'a' and type 'B' aircraft. Type 'a' aircraft require minimum of 1 degree flaps. Type 'B' requires 5 degrees minimum for takeoff. Checklist relies on memory as to aircraft type 'a' or 'B' for minimum flap setting.
Original NASA ASRS Text
Title: ACR MLG GOT A TKOF WARNING HORN AS THRUST LEVERS WERE ADVANCED. AFTER ABORT THE FLT CREW RECYCLED THE ITEMS COVERED BY THE WARNING HORN TAXIED BACK AND MADE A NORMAL TKOF. REPORTER NOT SURE IF 1 DEGREE OF FLAP HAD BEEN SET OF 5 DEGREES AS REQUIRED.
Narrative: ON APPLICATION OF TKOF PWR, TKOF WARNING HORN SOUNDED. CHKED POS OF FLAPS, LED'S, STABILIZER AND SPD BRAKE. NOTICED NO IRREGULARITIES. ABORTED TKOF. NO AIRSPD HAD REGISTERED. TAXIED CLR OF RWY. CYCLED PREVIOUSLY MENTIONED ITEMS. CHKED TKOF WARNING HORN WITH PWR APPLICATION. NO HORN. TAXI BACK AND COMMENCED NORMAL UNEVENTFUL TKOF. AFTER REVIEW OF SITUATION WE (BOTH PLTS) WERE UNSURE OF FLAPS BEING 1 OR 5 DEGS. THE CHKLIST IS GENERIC FOR BOTH MLG TYPE 'A' AND TYPE 'B' ACFT. TYPE 'A' ACFT REQUIRE MINIMUM OF 1 DEG FLAPS. TYPE 'B' REQUIRES 5 DEGS MINIMUM FOR TKOF. CHKLIST RELIES ON MEMORY AS TO ACFT TYPE 'A' OR 'B' FOR MINIMUM FLAP SETTING.
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.