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After installing a newly overhauled left main gear; mechanics noticed the A319 left gear unsafe light illuminated. Twisted wire pair shorting out inside conduit at 90 degree bend at top of strut.
| Attributes | |
| ACN | 785776 |
| Time | |
| Date | 200803 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | A319 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : maintenance |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| ASRS Report | 785776 |
| Events | |
| Anomaly | 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 |
| Factors | |
| Maintenance | performance deficiency : repair performance deficiency : testing performance deficiency : non compliance with legal requirements performance deficiency : inspection |
| Supplementary | |
| Problem Areas | Company Maintenance Human Performance |
| Primary Problem | Maintenance Human Performance |
Narrative:
After installing new left main gear on aircraft (overhauled gear); had left gear unsafe light illuminated in flight deck. Test indicated proximity sensor 15GA to be at fault. After further troubleshooting; found twisted wire pair pinched and shorting out inside of conduit at 90 degree bend at top of strut; between 15GA and connector 4027VC. Reference ipc; after wires were replaced with a new twisted pair; all indications were normal. Callback conversation with reporter revealed the following information: reporter stated the left main gear unsafe light illuminated in the cockpit; while the aircraft was still on jacks in the hangar. This was not an in-flight incident.
Original NASA ASRS Text
Title: AFTER INSTALLING A NEWLY OVERHAULED LEFT MAIN GEAR; MECHANICS NOTICED THE A319 LEFT GEAR UNSAFE LIGHT ILLUMINATED. TWISTED WIRE PAIR SHORTING OUT INSIDE CONDUIT AT 90 DEGREE BEND AT TOP OF STRUT.
Narrative: AFTER INSTALLING NEW L MAIN GEAR ON ACFT (OVERHAULED GEAR); HAD L GEAR UNSAFE LIGHT ILLUMINATED IN FLT DECK. TEST INDICATED PROX SENSOR 15GA TO BE AT FAULT. AFTER FURTHER TROUBLESHOOTING; FOUND TWISTED WIRE PAIR PINCHED AND SHORTING OUT INSIDE OF CONDUIT AT 90 DEG BEND AT TOP OF STRUT; BTWN 15GA AND CONNECTOR 4027VC. REF IPC; AFTER WIRES WERE REPLACED WITH A NEW TWISTED PAIR; ALL INDICATIONS WERE NORMAL. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: REPORTER STATED THE LEFT MAIN GEAR UNSAFE LIGHT ILLUMINATED IN THE COCKPIT; WHILE THE ACFT WAS STILL ON JACKS IN THE HANGAR. THIS WAS NOT AN IN-FLIGHT INCIDENT.
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.