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Pilot reported descending below the glidepath on an RNAV approach in order to escape icing conditions.
| Attributes | |
| ACN | 1525989 |
| Time | |
| Date | 201803 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | 1H0.Airport |
| State Reference | MO |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Small Aircraft Low Wing 1 Eng Fixed Gear |
| Operating Under FAR Part | Part 91 |
| Flight Phase | Descent |
| Route In Use | Direct |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | AHRS/ND |
| Person 1 | |
| Function | Pilot Flying Single Pilot |
| Qualification | Flight Crew Flight Instructor Flight Crew Instrument |
| Experience | Flight Crew Last 90 Days 20 Flight Crew Total 5000 Flight Crew Type 700 |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe Deviation - Track / Heading All Types Inflight Event / Encounter Weather / Turbulence |
Narrative:
There was no mention in a briefing for ice. In fact; the departure from ZZZ was through IMC without incident. Upon reaching the 1h0 area I was offered direct odujy and the RNAV 34 into 1h0. At that time a falcon jet went into sus and reported zero ice on the approach. About 10 miles from the fix I entered IMC as I descended through 4;000. Initially; the ice appeared to be light rime but almost immediately I encountered freezing rain and clear/rime mixed with jagged edges on my leading edges and a useless ice covered windscreen. The controller instructed to 'maintain 2;200 MSL' then corrected himself to; 'maintain 2;600 until odujy.' the actual altitude for odujy is 2;800 and 2;200 at the FAF. I was hand flying the aircraft to avoid autopilot disconnect and un-commanded aerobatics. There seemed no alternative but continue as the ceiling was reported to be at about 2;000 MSL. Just after the FAF; the navigation displays partially malfunctioned; but since I had a heading from odujy to the FAF I continued the approach to VMC and the icing abated. I continued to just above circling minimums and after some mild excursions found the airport. As the aircraft shed the significant ice I was able to circle to land 34. I considered the missed approach; but given an unexpected response from the EFIS and heavy ice; I elected to stay VMC. No damage to anything but the pilot's nerves.
Original NASA ASRS Text
Title: Pilot reported descending below the glidepath on an RNAV approach in order to escape icing conditions.
Narrative: There was no mention in a briefing for ice. In fact; the departure from ZZZ was through IMC without incident. Upon reaching the 1H0 area I was offered direct ODUJY and the RNAV 34 into 1H0. At that time a Falcon Jet went into SUS and reported zero ice on the approach. About 10 miles from the fix I entered IMC as I descended through 4;000. Initially; the ice appeared to be light rime but almost immediately I encountered freezing rain and clear/rime mixed with jagged edges on my leading edges and a useless ice covered windscreen. The controller instructed to 'maintain 2;200 MSL' then corrected himself to; 'maintain 2;600 until ODUJY.' The actual altitude for ODUJY is 2;800 and 2;200 at the FAF. I was hand flying the aircraft to avoid autopilot disconnect and un-commanded aerobatics. There seemed no alternative but continue as the ceiling was reported to be at about 2;000 MSL. Just after the FAF; the navigation displays partially malfunctioned; but since I had a heading from ODUJY to the FAF I continued the approach to VMC and the icing abated. I continued to just above circling minimums and after some mild excursions found the airport. As the aircraft shed the significant ice I was able to circle to land 34. I considered the missed approach; but given an unexpected response from the EFIS and heavy ice; I elected to stay VMC. No damage to anything but the pilot's nerves.
Data retrieved from NASA's ASRS site 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.