 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
A B742 crew, departing changi international, singapore, experienced an airspeed indicator malfunction resulting in a rejected takeoff.
| Attributes | |
| ACN | 527474 |
| Time | |
| Date | 200110 |
| Day | Tue |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : wsss.airport |
| State Reference | FO |
| Altitude | msl single value : 15 |
| Environment | |
| Flight Conditions | VMC |
| Weather Elements | Rain |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : wsss.tower tower : ism.tower |
| Operator | common carrier : air carrier |
| Make Model Name | B747-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : takeoff |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : flight engineer pilot : multi engine pilot : instrument pilot : atp pilot : commercial |
| Experience | flight time last 90 days : 166 flight time total : 13710 flight time type : 10096 |
| ASRS Report | 527474 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : multi engine pilot : cfi pilot : atp pilot : instrument pilot : flight engineer pilot : commercial |
| Experience | flight time last 90 days : 180 flight time total : 15000 flight time type : 8000 |
| ASRS Report | 528342 |
| Events | |
| Anomaly | aircraft equipment problem : critical inflight encounter : weather |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : rejected takeoff |
| Consequence | other |
| Supplementary | |
| Problem Areas | Aircraft |
| Primary Problem | Aircraft |
Narrative:
After setting takeoff power and during takeoff roll, captain's airspeed indicator needle stayed at 0 KTS. Captain (PNF) scanned copilot's indicator (PF) and his needle was passing through 80 KTS. Captain commanded 'abort' and as abort was initiated, copilot's indicator needle indicated accelerating through 90 KTS as deceleration occurred. At that point, captain's indicator needle then jumped to 62-64 KTS. Further airspeed indications were not noted due to attention given to abort. Indicated airspeed on copilot's indicator reached up to about 98 KIAS (90 KTS INS ground speed) as best seen by crew. Subsequent maintenance procedure showed captain's airspeed indicator as faulty.
Original NASA ASRS Text
Title: A B742 CREW, DEPARTING CHANGI INTL, SINGAPORE, EXPERIENCED AN AIRSPD INDICATOR MALFUNCTION RESULTING IN A REJECTED TKOF.
Narrative: AFTER SETTING TKOF PWR AND DURING TKOF ROLL, CAPT'S AIRSPD INDICATOR NEEDLE STAYED AT 0 KTS. CAPT (PNF) SCANNED COPLT'S INDICATOR (PF) AND HIS NEEDLE WAS PASSING THROUGH 80 KTS. CAPT COMMANDED 'ABORT' AND AS ABORT WAS INITIATED, COPLT'S INDICATOR NEEDLE INDICATED ACCELERATING THROUGH 90 KTS AS DECELERATION OCCURRED. AT THAT POINT, CAPT'S INDICATOR NEEDLE THEN JUMPED TO 62-64 KTS. FURTHER AIRSPD INDICATIONS WERE NOT NOTED DUE TO ATTN GIVEN TO ABORT. INDICATED AIRSPD ON COPLT'S INDICATOR REACHED UP TO ABOUT 98 KIAS (90 KTS INS GND SPD) AS BEST SEEN BY CREW. SUBSEQUENT MAINT PROC SHOWED CAPT'S AIRSPD INDICATOR AS FAULTY.
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.