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A previously deferred intercom system continues to be a problem causing a diversion to an en route maintenance station.
| Attributes | |
| ACN | 533896 |
| Time | |
| Date | 200112 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : zob.artcc |
| State Reference | OH |
| Altitude | msl single value : 35000 |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zob.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B757-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : multi engine pilot : commercial |
| ASRS Report | 533896 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper documentation maintenance problem : improper maintenance maintenance problem : non compliance with mel non adherence : published procedure |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : landed as precaution |
| Consequence | other other |
| Supplementary | |
| Problem Areas | Aircraft Maintenance Human Performance |
| Primary Problem | Aircraft |
Narrative:
The aircraft had a placard, MEL 23-6B -- cockpit to ground interphone inoperative. While conducting the before start checklist, we checked the oxygen mask/intercom/goggle check in the normal manner. The oxygen mask could be heard through the speaker, but the sound was faint. We determined that this was due to the MEL. We continued to push back and depart ewr. At cruise, we discussed the MEL and began to investigate the interphone system. We tested both captain and first officer, as well as the first and second observer's interphone system. We could transmit on VHF frequency, but we could not communicate over the intercom. We then called dispatch, and after some troubleshooting, we all determined that we had to fix the problem. We diverted to ZZZ where they fixed the problem.
Original NASA ASRS Text
Title: A PREVIOUSLY DEFERRED INTERCOM SYS CONTINUES TO BE A PROB CAUSING A DIVERSION TO AN ENRTE MAINT STATION.
Narrative: THE ACFT HAD A PLACARD, MEL 23-6B -- COCKPIT TO GND INTERPHONE INOP. WHILE CONDUCTING THE BEFORE START CHKLIST, WE CHKED THE OXYGEN MASK/INTERCOM/GOGGLE CHK IN THE NORMAL MANNER. THE OXYGEN MASK COULD BE HEARD THROUGH THE SPEAKER, BUT THE SOUND WAS FAINT. WE DETERMINED THAT THIS WAS DUE TO THE MEL. WE CONTINUED TO PUSH BACK AND DEPART EWR. AT CRUISE, WE DISCUSSED THE MEL AND BEGAN TO INVESTIGATE THE INTERPHONE SYS. WE TESTED BOTH CAPT AND FO, AS WELL AS THE FIRST AND SECOND OBSERVER'S INTERPHONE SYS. WE COULD XMIT ON VHF FREQ, BUT WE COULD NOT COMMUNICATE OVER THE INTERCOM. WE THEN CALLED DISPATCH, AND AFTER SOME TROUBLESHOOTING, WE ALL DETERMINED THAT WE HAD TO FIX THE PROB. WE DIVERTED TO ZZZ WHERE THEY FIXED THE PROB.
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.