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Flight crew of an embraer EMB110 inadvertently took off without tower clearance due to an unknown problem with their aircraft radio communication system.
| Attributes | |
| ACN | 383190 |
| Time | |
| Date | 199710 |
| Day | Sun |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : ptk |
| State Reference | MI |
| Altitude | agl bound lower : 0 agl bound upper : 0 |
| Environment | |
| Flight Conditions | VMC |
| Light | Dawn |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | EMB-110 All Series |
| Operating Under FAR Part | Part 135 |
| Flight Phase | climbout : initial climbout : takeoff ground other : taxi |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 20 flight time total : 2340 flight time type : 1070 |
| ASRS Report | 383190 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial |
| Events | |
| Anomaly | aircraft equipment problem : less severe incursion : runway non adherence : far |
| Independent Detector | other controllera |
| Resolutory Action | none taken : detected after the fact |
| Consequence | faa : reviewed incident with flight crew |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | Pilot Deviation |
Narrative:
On aug/sun/97, at ptk, at XX00Z our crew was preparing to depart oakland-pontiac. We called clearance delivery with no response. We tried them again with no response then switched to ground for our clearance. We got no response there either so we tried the tower. No response there either. The first officer had been on the radios so now I tried -- all 3 frequencys and no response. I tried both radios and so did the first officer. No response. We taxied into a position where the tower could see us and tried them again -- nothing. There was no other traffic moving about at this time and we concluded the tower was closed. We called our taxi to 'pontiac-traffic' on tower frequency 120.5 and taxied out. It was VFR and I decided we'd takeoff and get our clearance once airborne from detroit. We taxied to runway 27L and did our run-up. We called traffic again and announced our intentions and with no traffic on final or base, we departed. At 1000 ft AGL, we called detroit -- the first officer got no response and I tried 124.9, 126.85. After 3 tries detroit answered and said before they gave me a clearance to call ptk tower, I did and they answered. He asked what happened and I explained everything we had tried. We then completed our flight. We had a radio problem (first officer unable to transmit on radio #1 and sometimes on #2) the rest of the day. At no time was another aircraft involved.
Original NASA ASRS Text
Title: FLC OF AN EMBRAER EMB110 INADVERTENTLY TOOK OFF WITHOUT TWR CLRNC DUE TO AN UNKNOWN PROB WITH THEIR ACFT RADIO COM SYS.
Narrative: ON AUG/SUN/97, AT PTK, AT XX00Z OUR CREW WAS PREPARING TO DEPART OAKLAND-PONTIAC. WE CALLED CLRNC DELIVERY WITH NO RESPONSE. WE TRIED THEM AGAIN WITH NO RESPONSE THEN SWITCHED TO GND FOR OUR CLRNC. WE GOT NO RESPONSE THERE EITHER SO WE TRIED THE TWR. NO RESPONSE THERE EITHER. THE FO HAD BEEN ON THE RADIOS SO NOW I TRIED -- ALL 3 FREQS AND NO RESPONSE. I TRIED BOTH RADIOS AND SO DID THE FO. NO RESPONSE. WE TAXIED INTO A POS WHERE THE TWR COULD SEE US AND TRIED THEM AGAIN -- NOTHING. THERE WAS NO OTHER TFC MOVING ABOUT AT THIS TIME AND WE CONCLUDED THE TWR WAS CLOSED. WE CALLED OUR TAXI TO 'PONTIAC-TFC' ON TWR FREQ 120.5 AND TAXIED OUT. IT WAS VFR AND I DECIDED WE'D TKOF AND GET OUR CLRNC ONCE AIRBORNE FROM DETROIT. WE TAXIED TO RWY 27L AND DID OUR RUN-UP. WE CALLED TFC AGAIN AND ANNOUNCED OUR INTENTIONS AND WITH NO TFC ON FINAL OR BASE, WE DEPARTED. AT 1000 FT AGL, WE CALLED DETROIT -- THE FO GOT NO RESPONSE AND I TRIED 124.9, 126.85. AFTER 3 TRIES DETROIT ANSWERED AND SAID BEFORE THEY GAVE ME A CLRNC TO CALL PTK TWR, I DID AND THEY ANSWERED. HE ASKED WHAT HAPPENED AND I EXPLAINED EVERYTHING WE HAD TRIED. WE THEN COMPLETED OUR FLT. WE HAD A RADIO PROB (FO UNABLE TO XMIT ON RADIO #1 AND SOMETIMES ON #2) THE REST OF THE DAY. AT NO TIME WAS ANOTHER ACFT INVOLVED.
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.