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Military trainer climbed above assigned altitude in attempt to get out of aircraft icing conditions. Pilot deviation.
| Attributes | |
| ACN | 85352 |
| Time | |
| Date | 198804 |
| Day | Wed |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : ilm airport : gsb |
| State Reference | NC |
| Altitude | msl bound lower : 10000 msl bound upper : 13000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zdc tracon : gsb artcc : zdc |
| Operator | other |
| Make Model Name | Military Trainer |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| ASRS Report | 85352 |
| Person 2 | |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : military |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude inflight encounter : weather inflight encounter other non adherence : clearance |
| Independent Detector | other controllera |
| Resolutory Action | flight crew : declared emergency none taken : detected after the fact |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation other |
Narrative:
MTR X departed gsb and was cleared to maintain 10000' by gsb RAPCON. I received an automated handoff from gsb. I noticed the mode C readout indicating that X was climbing through 10000'. I called gsb on the handoff line and asked what aircraft X was doing as he was not on my frequency. Gsb said that he had encountered icing and was apparently climbing on his own. About this time MTR X reported on the frequency climbing through 13000'. I inquired as to what his assigned altitude was, and what he was doing. MTR X claimed he encountered icing and was trying to climb through it to get on top. I asked if he was declaring an emergency and he said no. Fortunately, no other aircraft were in his vicinity! Possible factors in this incident are: pilot flying aircraft into conditions it could not handle or overreacting to the condition, and poor WX briefing or possible unforecast icing--however icing had been present all day. Pilot should have requested an altitude deviation prior to busting his altitude.
Original NASA ASRS Text
Title: MIL TRAINER CLIMBED ABOVE ASSIGNED ALT IN ATTEMPT TO GET OUT OF ACFT ICING CONDITIONS. PLT DEVIATION.
Narrative: MTR X DEPARTED GSB AND WAS CLRED TO MAINTAIN 10000' BY GSB RAPCON. I RECEIVED AN AUTOMATED HDOF FROM GSB. I NOTICED THE MODE C READOUT INDICATING THAT X WAS CLBING THROUGH 10000'. I CALLED GSB ON THE HDOF LINE AND ASKED WHAT ACFT X WAS DOING AS HE WAS NOT ON MY FREQ. GSB SAID THAT HE HAD ENCOUNTERED ICING AND WAS APPARENTLY CLBING ON HIS OWN. ABOUT THIS TIME MTR X RPTED ON THE FREQ CLBING THROUGH 13000'. I INQUIRED AS TO WHAT HIS ASSIGNED ALT WAS, AND WHAT HE WAS DOING. MTR X CLAIMED HE ENCOUNTERED ICING AND WAS TRYING TO CLB THROUGH IT TO GET ON TOP. I ASKED IF HE WAS DECLARING AN EMER AND HE SAID NO. FORTUNATELY, NO OTHER ACFT WERE IN HIS VICINITY! POSSIBLE FACTORS IN THIS INCIDENT ARE: PLT FLYING ACFT INTO CONDITIONS IT COULD NOT HANDLE OR OVERREACTING TO THE CONDITION, AND POOR WX BRIEFING OR POSSIBLE UNFORECAST ICING--HOWEVER ICING HAD BEEN PRESENT ALL DAY. PLT SHOULD HAVE REQUESTED AN ALT DEVIATION PRIOR TO BUSTING HIS ALT.
Data retrieved from NASA's ASRS site as of August 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.