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A DC9-80 was dispatched in noncompliance with the #1 communication tuning selector malfunctioning and deferred in conflict with the min equipment list.
| Attributes | |
| ACN | 567029 |
| Time | |
| Date | 200211 |
| Day | Mon |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | MD-80 Series (DC-9-80) Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : parked |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : multi engine pilot : flight engineer pilot : atp |
| Experience | flight time last 90 days : 210 flight time total : 14000 flight time type : 7000 |
| ASRS Report | 567029 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : non compliance with mel non adherence : far non adherence : published procedure |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other |
| Factors | |
| Maintenance | contributing factor : schedule pressure performance deficiency : repair performance deficiency : non compliance with legal requirements performance deficiency : fault isolation |
| Supplementary | |
| Problem Areas | Maintenance Human Performance Flight Crew Human Performance Aircraft |
| Primary Problem | Maintenance Human Performance |
Narrative:
Our aircraft was arriving with other crew. After talking with crew leaving the aircraft, we did our preflight and duties in order to depart. We noticed our aircraft #1 radio (with 2 heads) had a tuning problem on the 'B' side. The knob would only go up or down to certain spot then stop. The frequency (we discovered) was off by .10 decimals. We called maintenance to fix said radio. They gave us an 'en route' MEL. After hearing what they told us to write, we told them that the xfer switch was working and the problem was the tuning knob. They got it straight and gave us a number of the MEL (new one for the problem). We looked it up in the manual and read it to be correct. However, the title of the MEL only addressed the number '2' radio. The aircraft #1 radio happens to be on the emergency bus. The radio we have in case of loss of all normal power! What surprised us was that we did not think about loss of all normal power would take out the #2 radio, because that's what we had. I mention this because we were thinking that we still had the 'a' side of the aircraft #1 communication (only the 'B' side of communication #1 was inoperative). It dawned on us only after the mechanic came in and changed out the aircraft #1 radio after we landed (after the write-up and subsequent MEL.)
Original NASA ASRS Text
Title: A DC9-80 WAS DISPATCHED IN NONCOMPLIANCE WITH THE #1 COM TUNING SELECTOR MALFUNCTIONING AND DEFERRED IN CONFLICT WITH THE MIN EQUIP LIST.
Narrative: OUR ACFT WAS ARRIVING WITH OTHER CREW. AFTER TALKING WITH CREW LEAVING THE ACFT, WE DID OUR PREFLT AND DUTIES IN ORDER TO DEPART. WE NOTICED OUR ACFT #1 RADIO (WITH 2 HEADS) HAD A TUNING PROB ON THE 'B' SIDE. THE KNOB WOULD ONLY GO UP OR DOWN TO CERTAIN SPOT THEN STOP. THE FREQ (WE DISCOVERED) WAS OFF BY .10 DECIMALS. WE CALLED MAINT TO FIX SAID RADIO. THEY GAVE US AN 'ENRTE' MEL. AFTER HEARING WHAT THEY TOLD US TO WRITE, WE TOLD THEM THAT THE XFER SWITCH WAS WORKING AND THE PROB WAS THE TUNING KNOB. THEY GOT IT STRAIGHT AND GAVE US A NUMBER OF THE MEL (NEW ONE FOR THE PROB). WE LOOKED IT UP IN THE MANUAL AND READ IT TO BE CORRECT. HOWEVER, THE TITLE OF THE MEL ONLY ADDRESSED THE NUMBER '2' RADIO. THE ACFT #1 RADIO HAPPENS TO BE ON THE EMER BUS. THE RADIO WE HAVE IN CASE OF LOSS OF ALL NORMAL PWR! WHAT SURPRISED US WAS THAT WE DID NOT THINK ABOUT LOSS OF ALL NORMAL PWR WOULD TAKE OUT THE #2 RADIO, BECAUSE THAT'S WHAT WE HAD. I MENTION THIS BECAUSE WE WERE THINKING THAT WE STILL HAD THE 'A' SIDE OF THE ACFT #1 COM (ONLY THE 'B' SIDE OF COM #1 WAS INOP). IT DAWNED ON US ONLY AFTER THE MECH CAME IN AND CHANGED OUT THE ACFT #1 RADIO AFTER WE LANDED (AFTER THE WRITE-UP AND SUBSEQUENT MEL.)
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.