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While trouble shooting a right-hand forward egress emergency light for being inoperative on a dhc-8-100; mechanic also notices other improper electrical work was done; including connection to an incorrect battery and improper wire splicing.
| Attributes | |
| ACN | 811299 |
| Time | |
| Date | 200811 |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | Dash 8-100 |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| ASRS Report | 811299 |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper maintenance maintenance problem : improper documentation non adherence : published procedure non adherence : far |
| Independent Detector | other other : 1 |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other |
| Factors | |
| Maintenance | performance deficiency : installation performance deficiency : non compliance with legal requirements |
| Supplementary | |
| Problem Areas | Maintenance Human Performance |
| Primary Problem | Maintenance Human Performance |
Narrative:
Attached is the history for a discrepancy. A mechanic discovered the r-hand forward egress emergency light inoperative. Upon inspection and troubleshooting; I unfortunately found the problem. Upon correcting the discrepancies it was also found that wire 3352-4b20 was not connected to 3352-E35 and that the original discrepancy of 2 forward emergency escape path lights was due to a bad battery base. A temporary wire was run from emergency light battery 3351-PS2 to splice 3352-E35. The original wire from pin 6 on 3351-P2 had been removed and was hanging to the side with the pin still attached (not capped and stowed). By doing this; the r-hand forward emergency egress was disabled. The original discrepancy was solved; but the incorrect battery was used to power the 2 forward emergency lights.
Original NASA ASRS Text
Title: WHILE TROUBLE SHOOTING A RIGHT-HAND FORWARD EGRESS EMERGENCY LIGHT FOR BEING INOP ON A DHC-8-100; MECHANIC ALSO NOTICES OTHER IMPROPER ELECTRICAL WORK WAS DONE; INCLUDING CONNECTION TO AN INCORRECT BATTERY AND IMPROPER WIRE SPLICING.
Narrative: ATTACHED IS THE HISTORY FOR A DISCREPANCY. A MECH DISCOVERED THE R-HAND FORWARD EGRESS EMER LIGHT INOP. UPON INSPECTION AND TROUBLESHOOTING; I UNFORTUNATELY FOUND THE PROB. UPON CORRECTING THE DISCREPANCIES IT WAS ALSO FOUND THAT WIRE 3352-4B20 WAS NOT CONNECTED TO 3352-E35 AND THAT THE ORIGINAL DISCREPANCY OF 2 FORWARD EMER ESCAPE PATH LIGHTS WAS DUE TO A BAD BATTERY BASE. A TEMPORARY WIRE WAS RUN FROM EMER LIGHT BATTERY 3351-PS2 TO SPLICE 3352-E35. THE ORIGINAL WIRE FROM PIN 6 ON 3351-P2 HAD BEEN REMOVED AND WAS HANGING TO THE SIDE WITH THE PIN STILL ATTACHED (NOT CAPPED AND STOWED). BY DOING THIS; THE R-HAND FORWARD EMER EGRESS WAS DISABLED. THE ORIGINAL DISCREPANCY WAS SOLVED; BUT THE INCORRECT BATTERY WAS USED TO PWR THE 2 FORWARD EMER LIGHTS.
Data retrieved from NASA's ASRS site as of May 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.