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BE20 pilot reported descending below cleared altitude inbound because he had the wrong altimeter setting after misunderstanding ATIS.
| Attributes | |
| ACN | 1520126 |
| Time | |
| Date | 201802 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | ZZZ.TRACON |
| State Reference | US |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Super King Air 200 |
| Operating Under FAR Part | Part 135 |
| Flight Phase | Initial Approach |
| Route In Use | Vectors |
| Flight Plan | IFR |
| Person 1 | |
| Function | Other / Unknown |
| Qualification | Flight Crew Air Transport Pilot (ATP) Flight Crew Multiengine Flight Crew Instrument Flight Crew Flight Instructor |
| Experience | Flight Crew Last 90 Days 60 Flight Crew Total 5500 Flight Crew Type 1600 |
| Events | |
| Anomaly | Deviation - Altitude Overshoot Deviation - Procedural Clearance Deviation - Procedural Published Material / Policy Inflight Event / Encounter Weather / Turbulence |
Narrative:
Inbound to [the airport] from the southeast; east side of the mountains I had some difficulty receiving ATIS. We were occasionally experiencing moderate turbulence; with continuous light turbulence accompanied by a trace of mixed ice. On rv (radar vectors) after passing the mountains from east to west; I was instructed to descend to 11;000 ft. Just before leveling off ATC queried me; if I was leveling 11;000 ft; I replied affirmative. At this point I was near intercept of the lda localizer. The controller responded immediately; 'cleared 10;000 feet; altimeter 29.55'. I immediately arrested my descent; and corrected my altimeter to the lower and correct setting of 29.55. This controller did an incredible and prompt job at correcting me; for which I am extremely grateful.earlier on when I had received ATIS I had misheard what the altimeter setting was even after several attempts to hear ATIS. I had set an incorrect and much higher pressure value in my altimeter. Ultimately causing myself to believe the aircraft was much higher that it was in reality.I should have been more diligent to receive the correct altimeter setting; and certainly I could have simply queried ATC what the current altimeter setting was in order to confirm; which I will do in the future. I had never made this mistake in hard IFR while at the critical phase of an initial approach segment until last night. I will be continually vigilant of having an accurate altimeter settings.
Original NASA ASRS Text
Title: BE20 pilot reported descending below cleared altitude inbound because he had the wrong altimeter setting after misunderstanding ATIS.
Narrative: Inbound to [the airport] from the southeast; east side of the mountains I had some difficulty receiving ATIS. We were occasionally experiencing moderate turbulence; with continuous light turbulence accompanied by a trace of mixed ice. On RV (Radar Vectors) after passing the mountains from east to west; I was instructed to descend to 11;000 ft. Just before leveling off ATC queried me; if I was leveling 11;000 ft; I replied affirmative. At this point I was near intercept of the LDA LOC. The Controller responded immediately; 'cleared 10;000 feet; altimeter 29.55'. I immediately arrested my descent; and corrected my altimeter to the lower and correct setting of 29.55. This Controller did an incredible and prompt job at correcting me; for which I am extremely grateful.Earlier on when I had received ATIS I had misheard what the altimeter setting was even after several attempts to hear ATIS. I had set an incorrect and much higher pressure value in my altimeter. Ultimately causing myself to believe the aircraft was much higher that it was in reality.I should have been more diligent to receive the correct altimeter setting; and certainly I could have simply queried ATC what the current altimeter setting was in order to confirm; which I will do in the future. I had never made this mistake in hard IFR while at the critical phase of an initial approach segment until last night. I will be continually vigilant of having an accurate altimeter settings.
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.