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Interphone in smoke masks in aircraft new to fleet deactivated by company engineering order. Flight crew accepted the aircraft for flight.
| Attributes | |
| ACN | 197798 |
| Time | |
| Date | 199112 |
| Day | Fri |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : hnl |
| State Reference | HI |
| Altitude | agl bound lower : 0 agl bound upper : 0 |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | ground : preflight |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : commercial pilot : instrument |
| Experience | flight time last 90 days : 150 flight time total : 6500 flight time type : 3500 |
| ASRS Report | 197798 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial |
| Events | |
| Anomaly | aircraft equipment problem : less severe non adherence : published procedure non adherence : far non adherence other |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : anomaly accepted |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
Narrative:
First flight of the day. Assigned an aircraft new to our fleet which had numerous changes from the majority of our other medium large transport's. During preflight, could not hear over the oxygen mask interphone. Called maintenance. There was a sticker on both first officer's and captain's mask switch which stated 'deactivated.' we tested the mask microphone and it worked ok to talk on the radios. Informed by maintenance that the interphone had been deactivated per an engineering order. It didn't quite sound right, but the mask microphone did work and the first officer said he could use hand signals to communicate with me. The mechanic signed off the logbook stating it had been deactivated. This airplane has quite a few 'deactivated' stickers for several things that had been deactivated, so it did not seem too unusual. Later, I found out that the mechanic maintenance control, engineering had a communication problem and it should not have been deactivated. In the future, if it's not in the MEL, or cdl, just because there's an engineering order, doesn't mean it's right.
Original NASA ASRS Text
Title: INTERPHONE IN SMOKE MASKS IN ACFT NEW TO FLEET DEACTIVATED BY COMPANY ENGINEERING ORDER. FLC ACCEPTED THE ACFT FOR FLT.
Narrative: FIRST FLT OF THE DAY. ASSIGNED AN ACFT NEW TO OUR FLEET WHICH HAD NUMEROUS CHANGES FROM THE MAJORITY OF OUR OTHER MLG'S. DURING PREFLT, COULD NOT HEAR OVER THE OXYGEN MASK INTERPHONE. CALLED MAINT. THERE WAS A STICKER ON BOTH FO'S AND CAPT'S MASK SWITCH WHICH STATED 'DEACTIVATED.' WE TESTED THE MASK MICROPHONE AND IT WORKED OK TO TALK ON THE RADIOS. INFORMED BY MAINT THAT THE INTERPHONE HAD BEEN DEACTIVATED PER AN ENGINEERING ORDER. IT DIDN'T QUITE SOUND RIGHT, BUT THE MASK MICROPHONE DID WORK AND THE FO SAID HE COULD USE HAND SIGNALS TO COMMUNICATE WITH ME. THE MECH SIGNED OFF THE LOGBOOK STATING IT HAD BEEN DEACTIVATED. THIS AIRPLANE HAS QUITE A FEW 'DEACTIVATED' STICKERS FOR SEVERAL THINGS THAT HAD BEEN DEACTIVATED, SO IT DID NOT SEEM TOO UNUSUAL. LATER, I FOUND OUT THAT THE MECH MAINT CTL, ENGINEERING HAD A COM PROBLEM AND IT SHOULD NOT HAVE BEEN DEACTIVATED. IN THE FUTURE, IF IT'S NOT IN THE MEL, OR CDL, JUST BECAUSE THERE'S AN ENGINEERING ORDER, DOESN'T MEAN IT'S RIGHT.
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.