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T33 off lsv-vny was unable to communicate from front cockpit account push to talk switch inoperative. Back seat observer could communicate. Pilot rated but not IFR qualified. Pilot said to cancel IFR and controller thought they were reporting VFR on top. Later when deviating from flight plan the IFR clearance was again canceled.
| Attributes | |
| ACN | 367690 |
| Time | |
| Date | 199704 |
| Day | Sun |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : las |
| State Reference | NV |
| Altitude | msl bound lower : 17500 msl bound upper : 17500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zla |
| Operator | general aviation : personal |
| Operating Under FAR Part | Part 91 |
| Flight Phase | climbout : intermediate altitude cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | Other |
| Function | flight crew : single pilot |
| Qualification | pilot : private pilot : instrument pilot : commercial |
| Experience | flight time total : 3000 |
| ASRS Report | 367690 |
| Person 2 | |
| Affiliation | Other |
| Function | observation : observer |
| Qualification | pilot : private |
| Events | |
| Anomaly | aircraft equipment problem : less severe other spatial deviation |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other controllera |
| Resolutory Action | other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
Narrative:
After departing nellis AFB on IFR flight plan to vny, my push to talk switch was inoperative. I could not transmit to controller, 'back seat' could transmit. Back seat crew, while a pilot, was not familiar with IFR procedures. Between the stress of the situation and my attempts at explaining to him what to relate to controller a miscom occurred. I realized that it would be easier to fly VFR and asked the back seat pilot to cancel our flight plan and we would proceed VFR. I was under the impression we were VFR with flight following. The controller interpreted his communication with the back seat pilot to mean we were VFR on top on an IFR flight plan. We flew off of the IFR course by several mi. The controller advised us of our position. We then formally canceled IFR and proceeded VFR without incident.
Original NASA ASRS Text
Title: T33 OFF LSV-VNY WAS UNABLE TO COMMUNICATE FROM FRONT COCKPIT ACCOUNT PUSH TO TALK SWITCH INOP. BACK SEAT OBSERVER COULD COMMUNICATE. PLT RATED BUT NOT IFR QUALIFIED. PLT SAID TO CANCEL IFR AND CTLR THOUGHT THEY WERE RPTING VFR ON TOP. LATER WHEN DEVIATING FROM FLT PLAN THE IFR CLRNC WAS AGAIN CANCELED.
Narrative: AFTER DEPARTING NELLIS AFB ON IFR FLT PLAN TO VNY, MY PUSH TO TALK SWITCH WAS INOP. I COULD NOT XMIT TO CTLR, 'BACK SEAT' COULD XMIT. BACK SEAT CREW, WHILE A PLT, WAS NOT FAMILIAR WITH IFR PROCS. BTWN THE STRESS OF THE SIT AND MY ATTEMPTS AT EXPLAINING TO HIM WHAT TO RELATE TO CTLR A MISCOM OCCURRED. I REALIZED THAT IT WOULD BE EASIER TO FLY VFR AND ASKED THE BACK SEAT PLT TO CANCEL OUR FLT PLAN AND WE WOULD PROCEED VFR. I WAS UNDER THE IMPRESSION WE WERE VFR WITH FLT FOLLOWING. THE CTLR INTERPRETED HIS COM WITH THE BACK SEAT PLT TO MEAN WE WERE VFR ON TOP ON AN IFR FLT PLAN. WE FLEW OFF OF THE IFR COURSE BY SEVERAL MI. THE CTLR ADVISED US OF OUR POS. WE THEN FORMALLY CANCELED IFR AND PROCEEDED VFR WITHOUT INCIDENT.
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.