Narrative:
A BAe-125-800A airplane, N469RJ, was substantially damaged when it was involved in an accident upon landing on runway 33 at Coleman A Young Municipal Airport (KDET), Detroit, Michigan, USA. The two pilots onboard were not injured.
The crew was conducting an instrument landing system (ILS) approach. The air traffic controller at the departure airport advised them of the icing conditions present so the crew turned on the anti-ice system. The airplane did not have any airspeed oscillations during the approach. The flying pilot reported that the right wing "dropped" and a stall occurred as they approached the runway. He stated, "Although flight crew selected the correct Vref speed for the aircraft weight, they failed to add 10 kts for the 'operation in icing conditions' statement, per the aircraft checklist."
The stick shaker should have alerted the crew of the approaching stall. However, the flying pilot said that there was no shaker activation during the flight. The non-flying pilot felt the shaker was activated after the airplane came to rest.
The reason for the lack of a stick shaker warning was not determined during the investigation. However, the cockpit voice recording confirmed the pilots statements. The accident is consistent with the airplane stalling on approach due to ice buildup, and the accident likely would not have occurred had the pilots flown the higher approach speed recommended for flight in icing conditions.
Probable Cause: "The pilots failure to increase approach speed as recommended for flight in icing conditions, which resulted in an aerodynamic stall and subsequent impact with terrain. Contributing to the accident was the failure of the stall warning system to advise the crew of the approaching stall."
Loss of control
» WXYZ
KDET 031253Z 26008KT 10SM OVC011 M01/M03 A2987 RMK AO2 SLP121 T10111028
13:44 UTC / 08:44 local time:
KDET 031344Z 28008KT 10SM OVC010 M02/M03 A2986 RMK AO2 T10171028
| Status: | Accident investigation report completed and information captured |
| Date: | Tuesday 3 December 2019 |
| Time: | 08:34 |
| Type: |  British Aerospace BAe-125-800A |
| Operator: | Business Jet Managers Inc |
| Registration: | N469RJ |
| MSN: | 258067 |
| First flight: | 1986 |
| Total airframe hrs: | 19714 |
| Engines: | 2 Honeywell TFE731-5R-1H |
| Crew: | Fatalities: 0 / Occupants: 2 |
| Passengers: | Fatalities: 0 / Occupants: 0 |
| Total: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Aircraft fate: | Written off (damaged beyond repair) |
| Location: | Detroit-Coleman A. Young International Airport, MI (DET) ( United States of America)
|
| Phase: | Landing (LDG) |
| Nature: | Ferry/positioning |
| Departure airport: | Detroit-Willow Run Airport, MI (YIP/KYIP), United States of America |
| Detroit-Coleman A. Young International Airport, MI (DET/KDET), United States of America |
A BAe-125-800A airplane, N469RJ, was substantially damaged when it was involved in an accident upon landing on runway 33 at Coleman A Young Municipal Airport (KDET), Detroit, Michigan, USA. The two pilots onboard were not injured.
The crew was conducting an instrument landing system (ILS) approach. The air traffic controller at the departure airport advised them of the icing conditions present so the crew turned on the anti-ice system. The airplane did not have any airspeed oscillations during the approach. The flying pilot reported that the right wing "dropped" and a stall occurred as they approached the runway. He stated, "Although flight crew selected the correct Vref speed for the aircraft weight, they failed to add 10 kts for the 'operation in icing conditions' statement, per the aircraft checklist."
The stick shaker should have alerted the crew of the approaching stall. However, the flying pilot said that there was no shaker activation during the flight. The non-flying pilot felt the shaker was activated after the airplane came to rest.
The reason for the lack of a stick shaker warning was not determined during the investigation. However, the cockpit voice recording confirmed the pilots statements. The accident is consistent with the airplane stalling on approach due to ice buildup, and the accident likely would not have occurred had the pilots flown the higher approach speed recommended for flight in icing conditions.
Probable Cause:
Probable Cause: "The pilots failure to increase approach speed as recommended for flight in icing conditions, which resulted in an aerodynamic stall and subsequent impact with terrain. Contributing to the accident was the failure of the stall warning system to advise the crew of the approaching stall."
Accident investigation:
 |
|
Classification:
IcingLoss of control
Sources:
» FAA» WXYZ
METAR Weather report:
12:53 UTC / 07:53 local time:KDET 031253Z 26008KT 10SM OVC011 M01/M03 A2987 RMK AO2 SLP121 T10111028
13:44 UTC / 08:44 local time:
KDET 031344Z 28008KT 10SM OVC010 M02/M03 A2986 RMK AO2 T10171028
Photos
Map
This map shows the airport of departure and the intended destination of the flight. The line is connecting ADS-B datapoints from FlightAware.
Distance from Detroit-Willow Run Airport, MI to Detroit-Coleman A. Young International Airport, MI as the crow flies is 47 km (29 miles).
Accident location: Approximate; accuracy within a few kilometers.
Distance from Detroit-Willow Run Airport, MI to Detroit-Coleman A. Young International Airport, MI as the crow flies is 47 km (29 miles).
Accident location: Approximate; accuracy within a few kilometers.
This information is not presented as the Flight Safety Foundation or the Aviation Safety Network’s opinion as to the cause of the accident. It is preliminary and is based on the facts as they are known at this time.
The Aviation Safety Network is an exclusive service provided by:
Quick Links:
| ASN Home | Send Correction / Feedback |
| FSF Home | Disclaimer | Copyright |
| Contact Us | Privacy Policy |
| Press / Media |
CONNECT WITH US:
©2023 Flight Safety Foundation