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A B737-300 was dispatched with the right air data computer pitot input line not connected. Caused by maintenance action in replacing IRU.
| Attributes | |
| ACN | 673777 |
| Time | |
| Date | 200509 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B737-300 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : maintenance |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Qualification | technician : powerplant technician : airframe |
| ASRS Report | 673777 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Qualification | technician : airframe technician : powerplant |
| ASRS Report | 673778 |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper documentation maintenance problem : improper maintenance non adherence : published procedure non adherence : far |
| Independent Detector | aircraft equipment other aircraft equipment : fo air data instruments other flight crewa other flight crewb |
| Consequence | other other |
| Factors | |
| Maintenance | contributing factor : schedule pressure performance deficiency : non compliance with legal requirements performance deficiency : logbook entry performance deficiency : installation performance deficiency : inspection |
| Supplementary | |
| Problem Areas | Aircraft Environmental Factor Maintenance Human Performance |
| Primary Problem | Maintenance Human Performance |
Narrative:
Aircraft needed an IRU at position #1. I changed the IRU. To change the IRU; an air data computer pitot connection must be removed. After checking the IRU install and fix; I closed the east&east door without checking the pitot connection or checking air data computer operation.
Original NASA ASRS Text
Title: A B737-300 WAS DISPATCHED WITH THE R ADC PITOT INPUT LINE NOT CONNECTED. CAUSED BY MAINT ACTION IN REPLACING IRU.
Narrative: ACFT NEEDED AN IRU AT POS #1. I CHANGED THE IRU. TO CHANGE THE IRU; AN ADC PITOT CONNECTION MUST BE REMOVED. AFTER CHKING THE IRU INSTALL AND FIX; I CLOSED THE E&E DOOR WITHOUT CHKING THE PITOT CONNECTION OR CHKING ADC OP.
Data retrieved from NASA's ASRS site as of January 2009 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.