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A B737-300 was dispatched with an incomplete repair to the equipment cooling ducting. Automatic flow control valve exhaust duct had incorrect installation.
| Attributes | |
| ACN | 723198 |
| Time | |
| Date | 200701 |
| 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 |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| ASRS Report | 723198 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper documentation maintenance problem : improper maintenance non adherence : far non adherence : published procedure |
| Independent Detector | other other : 3 |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other |
| Factors | |
| Maintenance | contributing factor : briefing performance deficiency : scheduled maintenance performance deficiency : installation performance deficiency : inspection performance deficiency : non compliance with legal requirements |
| Supplementary | |
| Problem Areas | Maintenance Human Performance |
| Primary Problem | Maintenance Human Performance |
Narrative:
We were servicing aircraft on ground for an overboard duct for electrical cooling air. This duct comes off the automatic flow control valve. Both items were removed for a fuselage skin repair. When we received the new duct it appeared to be short. I temporarily installed said valve (that was my intent) and duct to take a measurement. I found the duct to in fact be too short. I did not remove either item. Since I was only going to see how short the duct was I did not look to see how the valve was installed. By not removing the valve I gave the mechanics who took over a misdirection.
Original NASA ASRS Text
Title: A B737-300 WAS DISPATCHED WITH AN INCOMPLETE REPAIR TO THE EQUIP COOLING DUCTING. AUTO FLOW CTL VALVE EXHAUST DUCT HAD INCORRECT INSTALLATION.
Narrative: WE WERE SVCING ACFT ON GND FOR AN OVERBOARD DUCT FOR ELECTRICAL COOLING AIR. THIS DUCT COMES OFF THE AUTO FLOW CTL VALVE. BOTH ITEMS WERE REMOVED FOR A FUSELAGE SKIN REPAIR. WHEN WE RECEIVED THE NEW DUCT IT APPEARED TO BE SHORT. I TEMPORARILY INSTALLED SAID VALVE (THAT WAS MY INTENT) AND DUCT TO TAKE A MEASUREMENT. I FOUND THE DUCT TO IN FACT BE TOO SHORT. I DID NOT REMOVE EITHER ITEM. SINCE I WAS ONLY GOING TO SEE HOW SHORT THE DUCT WAS I DID NOT LOOK TO SEE HOW THE VALVE WAS INSTALLED. BY NOT REMOVING THE VALVE I GAVE THE MECHS WHO TOOK OVER A MISDIRECTION.
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.