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A B757-200 was dispatched in non compliance with the left air data computer pitot static hoses not connected resulting in an aborted takeoff.
| Attributes | |
| ACN | 482882 |
| Time | |
| Date | 200008 |
| Day | Sat |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B757-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : parked ground : maintenance |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Qualification | technician : airframe technician : powerplant |
| Experience | maintenance technician : 6 |
| ASRS Report | 482882 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Qualification | technician : powerplant technician : airframe technician : fcc |
| ASRS Report | 483315 |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper maintenance non adherence : far non adherence : published procedure |
| Independent Detector | aircraft equipment other aircraft equipment : airspeed indicator |
| Resolutory Action | flight crew : rejected takeoff |
| Consequence | other |
| Factors | |
| Maintenance | contributing factor : schedule pressure performance deficiency : installation performance deficiency : inspection performance deficiency : scheduled maintenance |
| Supplementary | |
| Problem Areas | Chart Or Publication Maintenance Human Performance Aircraft |
| Primary Problem | Maintenance Human Performance |
Narrative:
While repairing an overspd indication, the left air data computer was replaced. After installing and testing the air data computer per the maintenance manual, 'there is no requirement for a leak test.' I went back a second time to check the pitot static line connection at the air data computer. Finding the lines connected and the air data computer secure, the aircraft was released for service. The next morning on the aircraft's first flight of the day, the crew aborted takeoff due to no airspeed indication on the captain's side. Line maintenance reseated the pitot static connectors at the air data computer then pumped up the captain's pitot static system. Airspeed indication then checked normal.
Original NASA ASRS Text
Title: A B757-200 WAS DISPATCHED IN NON COMPLIANCE WITH THE L AIR DATA COMPUTER PITOT STATIC HOSES NOT CONNECTED RESULTING IN AN ABORTED TKOF.
Narrative: WHILE REPAIRING AN OVERSPD INDICATION, THE L AIR DATA COMPUTER WAS REPLACED. AFTER INSTALLING AND TESTING THE AIR DATA COMPUTER PER THE MAINT MANUAL, 'THERE IS NO REQUIREMENT FOR A LEAK TEST.' I WENT BACK A SECOND TIME TO CHK THE PITOT STATIC LINE CONNECTION AT THE AIR DATA COMPUTER. FINDING THE LINES CONNECTED AND THE AIR DATA COMPUTER SECURE, THE ACFT WAS RELEASED FOR SVC. THE NEXT MORNING ON THE ACFT'S FIRST FLT OF THE DAY, THE CREW ABORTED TKOF DUE TO NO AIRSPD INDICATION ON THE CAPT'S SIDE. LINE MAINT RESEATED THE PITOT STATIC CONNECTORS AT THE AIR DATA COMPUTER THEN PUMPED UP THE CAPT'S PITOT STATIC SYS. AIRSPD INDICATION THEN CHKED NORMAL.
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.