- Date
- August 31, 1992, 14:50 local (19:50 UTC)
- Place
- Chattanooga, TN
- Injuries
- 25 uninjured
- Damage
- No damage
- Phase of flight
- Enroute
- Aircraft
- N245AESaab-Scania 340B
- Weather
- Visual (VMC) · Day
- Status
- Completed · report September 14, 1993
- Report
- Approved by Office Director
- FAA report
- 19920831046929I
- Case key
- 8528
From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the incident.
On this page
Probable cause
The failure and subsequent seizure of the reduction gear box, and the failure of the propeller control unit as a result of contaminated oil supply which is shared with the gear box.
Sequence of events
NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.
Analysis
The flight was cruising at an altitude of 15,000 feet. The flight crew observed the propeller oil pressure for the left engine rise above the red line, and shut the engine down. The flight was over Chattanooga, Tennessee, and the pilot elected to land at Chattanooga. The flight crew unsuccessfully attempted several times to feather the propeller. The flight crew reported that at some point, prior to exiting the runway after landing, the aircraft propeller had stopped rotating. Examination of the propeller gear box revealed that the gear box was seized as a result of a failure within the gear box. Examination of the propeller control unit revealed that the unit was failed to pitchlock as a result of contaminated oil supply from the gear box. Velocity minimum control with a non rotating propeller has not been determined for this aircraft.
Aircraft
- Registration
- N245AE
- Reported as
- Saab-Scania 340B
- Category
- Airplane
- Serial number
- 245
- Airframe hours
- 2,447
- Engine
- GE CT7-9B, 1,750 horsepower, turbo prop
- Damage
- No damage
- Flight
- Part 121
- Operator
- Flagship Airlines, Inc., doing business as American Eagle
- Registered owner
- Flagship Airlines, Inc
- Airworthiness certificate
- Standard, Transport
- Last inspection
- Continuous airworthiness · August 16, 1992 · 88 hours before
- Departed
- BNA · Nashville, TN
- Destination
- ATL · Atlanta, GA
- Flight plan
- IFR
Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.
Flight crew
As NTSB recorded them. NTSB leaves out names.
- Role
- Pilot
- Age
- 42
- Certificates
- Airline transport, Flight instructor
- Airplane ratings
- Multi-engine land
- Instrument ratings
- Airplane
- Medical
- Class 1, Valid Medical--no waivers/lim.
- Seat
- Left
- Flight hours
- 3,234 total · 1,000 in this make and model · 197 in the last 90 days · 1 in the last 24 hours
Weather
- Conditions
- Visual (VMC) · Day
- Wind
- 70° at 4 knots
- Visibility
- 10 statute miles
- Lowest ceiling
- 25,000 ft broken
- Temperature
- 82 °F, dew point 66 °F
- Altimeter
- 30.00 inHg
- Observed at
- BNA, 60 nm away
FAA reports on this event · 1
The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.
Other investigations on N245AE · 1
Matched to the same aircraft by N-number and date.