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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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Military helicopter was climbing on an IFR flight plan. Instructor pilot retarded a throttle to simulate an engine failure and aircraft began a descent from about 2000 ft to 1200 ft. Climbing aircraft may not descend and descending aircraft may not climb without an ATC clearance.
| Attributes | |
| ACN | 358685 |
| Time | |
| Date | 199701 |
| Day | Tue |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : bal |
| State Reference | MD |
| Altitude | msl bound lower : 1200 msl bound upper : 2000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : bwi |
| Operator | other |
| Make Model Name | Bell Helicopter Textron Undifferentiated or Other Model |
| Operating Under FAR Part | other : other |
| Flight Phase | climbout : intermediate altitude descent : intermediate altitude descent other |
| Route In Use | arrival : on vectors enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : military |
| Function | instruction : trainee oversight : pic |
| Qualification | pilot : military pilot : cfi pilot : atp |
| Experience | flight time last 90 days : 50 flight time total : 7000 flight time type : 2000 |
| ASRS Report | 358685 |
| Person 2 | |
| Affiliation | government : military |
| Function | instruction : instructor |
| Qualification | pilot : military |
| Events | |
| Anomaly | non adherence : clearance non adherence : far |
| Independent Detector | other controllera |
| Resolutory Action | none taken : detected after the fact |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Military training flight in VFR conditions, with IFR clearance, and ATC control, instructor pilot visual, pilot on controls wearing an instrument hood. ATC contact made, received vector and instruction to climb from 1000 to 3000 ft. At about 2000 ft MSL, instructor pilot reduced throttle to flight idle to simulate engine failure. Pilot on controls performed emergency actions and established autorotative descent. About 1200 ft MSL, power was restored and climb re-established. Action caused low altitude warning at ATC facility, which caused controller to contact aircraft and confirm climb was re-established.
Original NASA ASRS Text
Title: MIL HELI WAS CLBING ON AN IFR FLT PLAN. INSTRUCTOR PLT RETARDED A THROTTLE TO SIMULATE AN ENG FAILURE AND ACFT BEGAN A DSCNT FROM ABOUT 2000 FT TO 1200 FT. CLBING ACFT MAY NOT DSND AND DSNDING ACFT MAY NOT CLB WITHOUT AN ATC CLRNC.
Narrative: MIL TRAINING FLT IN VFR CONDITIONS, WITH IFR CLRNC, AND ATC CTL, INSTRUCTOR PLT VISUAL, PLT ON CTLS WEARING AN INST HOOD. ATC CONTACT MADE, RECEIVED VECTOR AND INSTRUCTION TO CLB FROM 1000 TO 3000 FT. AT ABOUT 2000 FT MSL, INSTRUCTOR PLT REDUCED THROTTLE TO FLT IDLE TO SIMULATE ENG FAILURE. PLT ON CTLS PERFORMED EMER ACTIONS AND ESTABLISHED AUTOROTATIVE DSCNT. ABOUT 1200 FT MSL, PWR WAS RESTORED AND CLB RE-ESTABLISHED. ACTION CAUSED LOW ALT WARNING AT ATC FACILITY, WHICH CAUSED CTLR TO CONTACT ACFT AND CONFIRM CLB WAS RE-ESTABLISHED.
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.