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A DC9-50 captain reports first officersouth jackbox inoperative. Found circuit breaker failed. Contract technician swapped pack fan circuit breaker into jackbox position. First officersouth jackbox checks ok. Deferred pack fan per MEL.
| Attributes | |
| ACN | 616476 |
| Time | |
| Date | 200404 |
| Day | Tue |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | DC-9 50 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : parked |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : cfi pilot : atp pilot : multi engine pilot : flight engineer |
| Experience | flight time last 90 days : 200 flight time total : 20000 flight time type : 15000 |
| ASRS Report | 616476 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Events | |
| Anomaly | aircraft equipment problem : critical other anomaly other |
| Independent Detector | other flight crewa other flight crewb |
| Resolutory Action | none taken : detected after the fact |
| Consequence | faa : reviewed incident with flight crew other other |
| Factors | |
| Maintenance | contributing factor : non availability of parts contributing factor : schedule pressure |
| Supplementary | |
| Problem Areas | Maintenance Human Performance Flight Crew Human Performance Chart Or Publication Aircraft FAA |
| Primary Problem | Aircraft |
Narrative:
During preflight, first officer's jackbox dead, would not transmit or receive. Found circuit breaker U-33 popped, would not reset. Called contract maintenance per maintenance control. He decided circuit breaker was bad, replaced with pack fan circuit breaker. First officer jackbox worked, MEL'ed pack fan. All work and signoffs under direction of maintenance. Upon arrival at dtw, mechanic checked logbook and expressed misgivings about work done. May/wed/04, I received phone call from flight operations to review facts. He said FAA inquiring about procedure.
Original NASA ASRS Text
Title: A DC9-50 CAPT RPTS FOS JACKBOX INOP. FOUND CIRCUIT BREAKER FAILED. CONTRACT TECHNICIAN SWAPPED PACK FAN CIRCUIT BREAKER INTO JACKBOX POS. FOS JACKBOX CHKS OK. DEFERRED PACK FAN PER MEL.
Narrative: DURING PREFLT, FO'S JACKBOX DEAD, WOULD NOT XMIT OR RECEIVE. FOUND CIRCUIT BREAKER U-33 POPPED, WOULD NOT RESET. CALLED CONTRACT MAINT PER MAINT CTL. HE DECIDED CIRCUIT BREAKER WAS BAD, REPLACED WITH PACK FAN CIRCUIT BREAKER. FO JACKBOX WORKED, MEL'ED PACK FAN. ALL WORK AND SIGNOFFS UNDER DIRECTION OF MAINT. UPON ARR AT DTW, MECH CHKED LOGBOOK AND EXPRESSED MISGIVINGS ABOUT WORK DONE. MAY/WED/04, I RECEIVED PHONE CALL FROM FLT OPS TO REVIEW FACTS. HE SAID FAA INQUIRING ABOUT PROC.
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.