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A DC9-30 on initial climb lost communication with the tower and departure control, restored communication by isolating the captain's audio panel.
| Attributes | |
| ACN | 379030 |
| Time | |
| Date | 199709 |
| Day | Mon |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : lga |
| State Reference | NY |
| Altitude | msl bound lower : 5000 msl bound upper : 5000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Dawn |
| Aircraft 1 | |
| Controlling Facilities | tracon : n90 |
| Operator | common carrier : air carrier |
| Make Model Name | DC-9 30 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | departure other enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : flight engineer pilot : atp |
| Experience | flight time last 90 days : 100 flight time total : 7200 flight time type : 100 |
| ASRS Report | 379030 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | aircraft equipment problem : less severe other anomaly other |
| Independent Detector | other flight crewa other other : unspecified cockpit |
| Resolutory Action | flight crew : overcame equipment problem |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
Narrative:
After departure from runway 31 on a heading of 360 degrees (assigned) from nyc lga, at 5000 ft MSL, it appeared that tower failed to switch us to departure. After no response from tower, we switched to departure control. No response was received from departure. The captain then attempted radio contact on both communication #2 and communication #3 with no response. All 3 radios appeared to be inoperative. While the captain troubleshot the LOM failure, 2 xmissions were received from departure, 1 a heading and 1 an altitude assignment. Both were complied with. Finally just under 10 mins from the onset of the communication failure, communications were re- established by deselecting the captain's audio control panel. Problem was now over. Flight continued on to destination with no further problems. The captain became the PF and I assumed the duties of the PNF, since I had normal communications. Maintenance logbook write-up was made at destination. Captain audio panel was replaced and no further communication problems happened.
Original NASA ASRS Text
Title: A DC9-30 ON INITIAL CLB LOST COM WITH THE TWR AND DEP CTL, RESTORED COM BY ISOLATING THE CAPT'S AUDIO PANEL.
Narrative: AFTER DEP FROM RWY 31 ON A HDG OF 360 DEGS (ASSIGNED) FROM NYC LGA, AT 5000 FT MSL, IT APPEARED THAT TWR FAILED TO SWITCH US TO DEP. AFTER NO RESPONSE FROM TWR, WE SWITCHED TO DEP CTL. NO RESPONSE WAS RECEIVED FROM DEP. THE CAPT THEN ATTEMPTED RADIO CONTACT ON BOTH COM #2 AND COM #3 WITH NO RESPONSE. ALL 3 RADIOS APPEARED TO BE INOP. WHILE THE CAPT TROUBLESHOT THE LOM FAILURE, 2 XMISSIONS WERE RECEIVED FROM DEP, 1 A HDG AND 1 AN ALT ASSIGNMENT. BOTH WERE COMPLIED WITH. FINALLY JUST UNDER 10 MINS FROM THE ONSET OF THE COM FAILURE, COMS WERE RE- ESTABLISHED BY DESELECTING THE CAPT'S AUDIO CTL PANEL. PROB WAS NOW OVER. FLT CONTINUED ON TO DEST WITH NO FURTHER PROBS. THE CAPT BECAME THE PF AND I ASSUMED THE DUTIES OF THE PNF, SINCE I HAD NORMAL COMS. MAINT LOGBOOK WRITE-UP WAS MADE AT DEST. CAPT AUDIO PANEL WAS REPLACED AND NO FURTHER COM PROBS HAPPENED.
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.