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An S340B was dispatched with the outside air temperature probe heater operating when on the ground. Technician failed to install relay fuse after temperature probe installation.
| Attributes | |
| ACN | 686662 |
| Time | |
| Date | 200602 |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Environment | |
| Light | Night |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | SF 340B |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : maintenance |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Qualification | technician : airframe technician : powerplant |
| Experience | maintenance technician : 17 |
| ASRS Report | 686662 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | maintenance : lead technician |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper documentation maintenance problem : improper maintenance non adherence : published procedure non adherence : far |
| Independent Detector | other other : 1 |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other Other |
| Factors | |
| Maintenance | contributing factor : schedule pressure performance deficiency : logbook entry performance deficiency : installation performance deficiency : inspection performance deficiency : testing performance deficiency : non compliance with legal requirements |
| Supplementary | |
| Problem Areas | Chart Or Publication Aircraft Maintenance Human Performance |
| Primary Problem | Maintenance Human Performance |
Narrative:
Performed operations check which involves removal of a fuse. Operations check was good. I was distraction by trying to accelerate curing of sealant and forgot to install fuse. I found the fuse in my pocket after departure. Fuse 8HK pwrs relay 10HK on ground through weight on wheels switch 8GA which de-energizes the outside air temperature probe. Result was that outside air temperature was pwred on ground. I called maintenance control who instructed aircraft to return. The distrs of determining alternative sealants and other means of accelerating cure times may have contributed to loss of focus.
Original NASA ASRS Text
Title: AN S340B WAS DISPATCHED WITH THE OUTSIDE AIR TEMP PROBE HEATER OPERATING WHEN ON THE GND. TECHNICIAN FAILED TO INSTALL RELAY FUSE AFTER TEMP PROBE INSTALLATION.
Narrative: PERFORMED OPS CHK WHICH INVOLVES REMOVAL OF A FUSE. OPS CHK WAS GOOD. I WAS DISTR BY TRYING TO ACCELERATE CURING OF SEALANT AND FORGOT TO INSTALL FUSE. I FOUND THE FUSE IN MY POCKET AFTER DEP. FUSE 8HK PWRS RELAY 10HK ON GND THROUGH WT ON WHEELS SWITCH 8GA WHICH DE-ENERGIZES THE OUTSIDE AIR TEMP PROBE. RESULT WAS THAT OUTSIDE AIR TEMP WAS PWRED ON GND. I CALLED MAINT CTL WHO INSTRUCTED ACFT TO RETURN. THE DISTRS OF DETERMINING ALTERNATIVE SEALANTS AND OTHER MEANS OF ACCELERATING CURE TIMES MAY HAVE CONTRIBUTED TO LOSS OF FOCUS.
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.