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Pilot of a PA31 overshot intermediate departure altitude due to the difference between the airport field elevation altimeter setting and that recorded by the departure control facility.
| Attributes | |
| ACN | 494880 |
| Time | |
| Date | 200012 |
| Day | Fri |
| Place | |
| Locale Reference | airport : ppo.airport |
| State Reference | IN |
| Altitude | msl bound lower : 5000 msl bound upper : 5600 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : sbn.tracon |
| Operator | general aviation : corporate |
| Make Model Name | PA-31 Navajo Chieftan/Mojave/Navajo T1020 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | departure other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : corporate |
| Function | flight crew : single pilot |
| Qualification | pilot : commercial pilot : instrument pilot : multi engine |
| Experience | flight time last 90 days : 30 flight time total : 9000 flight time type : 1500 |
| ASRS Report | 494880 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : departure |
| Qualification | controller : radar |
| Events | |
| Anomaly | altitude deviation : overshoot inflight encounter : weather non adherence : clearance |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued alert flight crew : returned to assigned altitude other |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Environmental Factor Weather |
| Primary Problem | Environmental Factor |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Piper cheyenne PA31T, IFR laporte (ppo) to grand rapids (grr). Before takeoff, called south bend on cell phone for void time and clearance. Set altimeter to field elevation of 820 ft. Clearance called for direct knox VOR and climb to 3000 ft. Did that, radar contact shortly after liftoff, then climbed to 5000 ft. Controller asked what my altitude was and I responded 5000 ft, then I asked the controller what the altimeter setting was. He responded 30.43. When I dialed that in (it was 30.18) I was at 5600 ft. I told him I set it to the field elevation. He called chicago on the landline and chicago said I was at 5000 ft. Hard to believe that big a pressure difference in 30 mi, but the WX was down at laporte, falpo (vpz) 15 NM west was reporting visibility 1/2 mi and ceiling 100 ft. Most have been a pocket of low pressure. Next time will get setting from controling controller (sbn). Tops were 2200 ft clear above.
Original NASA ASRS Text
Title: PLT OF A PA31 OVERSHOT INTERMEDIATE DEP ALT DUE TO THE DIFFERENCE BTWN THE ARPT FIELD ELEVATION ALTIMETER SETTING AND THAT RECORDED BY THE DEP CTL FACILITY.
Narrative: PIPER CHEYENNE PA31T, IFR LAPORTE (PPO) TO GRAND RAPIDS (GRR). BEFORE TKOF, CALLED SOUTH BEND ON CELL PHONE FOR VOID TIME AND CLRNC. SET ALTIMETER TO FIELD ELEVATION OF 820 FT. CLRNC CALLED FOR DIRECT KNOX VOR AND CLB TO 3000 FT. DID THAT, RADAR CONTACT SHORTLY AFTER LIFTOFF, THEN CLBED TO 5000 FT. CTLR ASKED WHAT MY ALT WAS AND I RESPONDED 5000 FT, THEN I ASKED THE CTLR WHAT THE ALTIMETER SETTING WAS. HE RESPONDED 30.43. WHEN I DIALED THAT IN (IT WAS 30.18) I WAS AT 5600 FT. I TOLD HIM I SET IT TO THE FIELD ELEVATION. HE CALLED CHICAGO ON THE LANDLINE AND CHICAGO SAID I WAS AT 5000 FT. HARD TO BELIEVE THAT BIG A PRESSURE DIFFERENCE IN 30 MI, BUT THE WX WAS DOWN AT LAPORTE, FALPO (VPZ) 15 NM W WAS RPTING VISIBILITY 1/2 MI AND CEILING 100 FT. MOST HAVE BEEN A POCKET OF LOW PRESSURE. NEXT TIME WILL GET SETTING FROM CTLING CTLR (SBN). TOPS WERE 2200 FT CLR ABOVE.
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.