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A B737-300 while being worked for a transmitter squeal the #1 and #2 receiver transmitter units were swapped. After the repair completed the receiver transmitter units were not returned to the correct installation.
| Attributes | |
| ACN | 693417 |
| Time | |
| Date | 200603 |
| 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 | B737-300 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : parked |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | oversight : supervisor |
| ASRS Report | 693417 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Qualification | technician : powerplant technician : airframe |
| ASRS Report | 693416 |
| Events | |
| Anomaly | aircraft equipment problem : less severe maintenance problem : improper documentation maintenance problem : improper maintenance non adherence : far non adherence : published procedure |
| Independent Detector | other other : 1 |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other |
| Factors | |
| Maintenance | contributing factor : schedule pressure contributing factor : manuals performance deficiency : installation performance deficiency : non compliance with legal requirements |
| Supplementary | |
| Problem Areas | Environmental Factor Maintenance Human Performance |
| Primary Problem | Maintenance Human Performance |
Narrative:
Air carrier X was scheduled to depart but had a problem with the #1 VHF communication squeal. I helped the mechanic troubleshoot and we removed and replaced the #1 VHF communication receiver/transmitter. The logbook was signed off and we went back to office. Then a second call from air carrier X with the same problem came in. I asked the mechanic to swap the VHF communication receiver/transmitter for troubleshooting. This was no help and we continued checking system for 35-40 mins. Cleaning the #1 VHF communication panel copilot cleared the squeal. The aircraft was ready to push off gate and I forgot to swap the receiver/transmitter back to original position and/or forgot to document that the receiver/transmitter had been swapped.
Original NASA ASRS Text
Title: A B737-300 WHILE BEING WORKED FOR A XMITTER SQUEAL THE #1 AND #2 RECEIVER XMITTER UNITS WERE SWAPPED. AFTER THE REPAIR COMPLETED THE RECEIVER XMITTER UNITS WERE NOT RETURNED TO THE CORRECT INSTALLATION.
Narrative: ACR X WAS SCHEDULED TO DEPART BUT HAD A PROB WITH THE #1 VHF COM SQUEAL. I HELPED THE MECH TROUBLESHOOT AND WE REMOVED AND REPLACED THE #1 VHF COM RECEIVER/XMITTER. THE LOGBOOK WAS SIGNED OFF AND WE WENT BACK TO OFFICE. THEN A SECOND CALL FROM ACR X WITH THE SAME PROB CAME IN. I ASKED THE MECH TO SWAP THE VHF COM RECEIVER/XMITTER FOR TROUBLESHOOTING. THIS WAS NO HELP AND WE CONTINUED CHKING SYS FOR 35-40 MINS. CLEANING THE #1 VHF COM PANEL COPLT CLRED THE SQUEAL. THE ACFT WAS READY TO PUSH OFF GATE AND I FORGOT TO SWAP THE RECEIVER/XMITTER BACK TO ORIGINAL POS AND/OR FORGOT TO DOCUMENT THAT THE RECEIVER/XMITTER HAD BEEN SWAPPED.
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.