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Flight crew of an light transport air carrier ferry flight climbed above assigned altitude in response to the aircraft GPWS alert.
| Attributes | |
| ACN | 250062 |
| Time | |
| Date | 199308 |
| Day | Thu |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : cie |
| State Reference | AZ |
| Altitude | msl bound lower : 11000 msl bound upper : 13000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | Light Transport |
| Flight Phase | cruise other |
| Route In Use | enroute airway : v16 |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp pilot : cfi pilot : instrument |
| Experience | flight time last 90 days : 150 flight time total : 4600 flight time type : 2600 |
| ASRS Report | 250062 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | aircraft equipment problem : less severe altitude deviation : excursion from assigned altitude non adherence : clearance other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | flight crew : took evasive action |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | Pilot Deviation other |
Narrative:
While level in cruise flight at 11000 ft MSL, we received a 'terrain' warning from our GPWS. We then received a couple of whoop, whoop pull up and 'too low gear' warnings. At this time we were in a rain shower with light to moderate turbulence in IFR flight conditions. The captain then set full power, pulled the nose up, and executed a tight 180 degree turn. At the completion of the turn, we were heading east at 13000 ft MSL. Our assigned altitude was 11000 ft, which was above the MEA of 10500 ft. It is possible that the GPWS malfunctioned since our light transport aircraft leak in the rain, sometimes enough to short out various circuit breakers and avionics. The light transport aircraft is especially prone to leak from the cockpit ditching hatch.
Original NASA ASRS Text
Title: FLC OF AN LTT ACR FERRY FLT CLBED ABOVE ASSIGNED ALT IN RESPONSE TO THE ACFT GPWS ALERT.
Narrative: WHILE LEVEL IN CRUISE FLT AT 11000 FT MSL, WE RECEIVED A 'TERRAIN' WARNING FROM OUR GPWS. WE THEN RECEIVED A COUPLE OF WHOOP, WHOOP PULL UP AND 'TOO LOW GEAR' WARNINGS. AT THIS TIME WE WERE IN A RAIN SHOWER WITH LIGHT TO MODERATE TURB IN IFR FLT CONDITIONS. THE CAPT THEN SET FULL PWR, PULLED THE NOSE UP, AND EXECUTED A TIGHT 180 DEG TURN. AT THE COMPLETION OF THE TURN, WE WERE HDG E AT 13000 FT MSL. OUR ASSIGNED ALT WAS 11000 FT, WHICH WAS ABOVE THE MEA OF 10500 FT. IT IS POSSIBLE THAT THE GPWS MALFUNCTIONED SINCE OUR LTT ACFT LEAK IN THE RAIN, SOMETIMES ENOUGH TO SHORT OUT VARIOUS CIRCUIT BREAKERS AND AVIONICS. THE LTT ACFT IS ESPECIALLY PRONE TO LEAK FROM THE COCKPIT DITCHING HATCH.
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.