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A B737-300 was dispatched in non compliance with the incorrect remote electronics unit installed for a communications report.
| Attributes | |
| ACN | 572883 |
| Time | |
| Date | 200302 |
| Day | Thu |
| Local Time Of Day | 0001 To 0600 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Environment | |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tower : sfo.tower |
| 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 |
| Qualification | technician : powerplant technician : airframe |
| ASRS Report | 572883 |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper maintenance maintenance problem : improper documentation non adherence : published procedure non adherence : far |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other other |
| Factors | |
| Maintenance | contributing factor : schedule pressure performance deficiency : installation performance deficiency : non compliance with legal requirements performance deficiency : logbook entry |
| Supplementary | |
| Problem Areas | Aircraft Maintenance Human Performance |
| Primary Problem | Maintenance Human Performance |
Narrative:
On the night of jan/mon/03, aircraft came in with a squawk of pilot/first officer couldn't transmit on VHF #1 and only sporadically on VHF #2. Captain indicated that the 'fob' select panel seemed to interfere. Previous stations had changed out control heads and a select panel. When it came to the station, was experiencing communication problems itself between base and inbound aircraft. During T/south, I had to contact aircraft to confirm that I could transmit, but not hear myself of transmitting. Noting that so many components had already been changed, I looked for something that would tie all this together. This ended up being the remote electronics unit. I went to the shop, not realizing that the -300/-500/-600 fleet had different models, so when I found the remote electronics unit on the shelf, I grabbed it, presuming that was what I needed. I then swapped out the remote electronics unit and did an operations check. This fixed the problem, so I signed off the discrepancy.
Original NASA ASRS Text
Title: A B737-300 WAS DISPATCHED IN NON COMPLIANCE WITH THE INCORRECT REMOTE ELECTRONICS UNIT INSTALLED FOR A COMS RPT.
Narrative: ON THE NIGHT OF JAN/MON/03, ACFT CAME IN WITH A SQUAWK OF PLT/FO COULDN'T XMIT ON VHF #1 AND ONLY SPORADICALLY ON VHF #2. CAPT INDICATED THAT THE 'FOB' SELECT PANEL SEEMED TO INTERFERE. PREVIOUS STATIONS HAD CHANGED OUT CTL HEADS AND A SELECT PANEL. WHEN IT CAME TO THE STATION, WAS EXPERIENCING COM PROBS ITSELF BTWN BASE AND INBOUND ACFT. DURING T/S, I HAD TO CONTACT ACFT TO CONFIRM THAT I COULD XMIT, BUT NOT HEAR MYSELF OF XMITTING. NOTING THAT SO MANY COMPONENTS HAD ALREADY BEEN CHANGED, I LOOKED FOR SOMETHING THAT WOULD TIE ALL THIS TOGETHER. THIS ENDED UP BEING THE REMOTE ELECTRONICS UNIT. I WENT TO THE SHOP, NOT REALIZING THAT THE -300/-500/-600 FLEET HAD DIFFERENT MODELS, SO WHEN I FOUND THE REMOTE ELECTRONICS UNIT ON THE SHELF, I GRABBED IT, PRESUMING THAT WAS WHAT I NEEDED. I THEN SWAPPED OUT THE REMOTE ELECTRONICS UNIT AND DID AN OPS CHK. THIS FIXED THE PROB, SO I SIGNED OFF THE DISCREPANCY.
Data retrieved from NASA's ASRS site as of July 2007 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.