ASN Wikibase Occurrence # 275098
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| Date: | Friday 12 March 2021 |
| Time: | 11:50 UTC |
| Type: |  Eurocopter EC 145 |
| Owner/operator: | National Police Air Service |
| Registration: | G-MPSB |
| MSN: | 9068 |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Minor |
| Category: | Serious incident |
| Location: | North Weald Airfield, North Weald Bassett, Epping Forest, Essex -
 United Kingdom
|
| Phase: | Landing |
| Nature: | Training |
| Departure airport: | North Weald Airport (EGSX) |
| North Weald Airport (EGSX) | |
| Investigating agency: | AAIB |
| Confidence Rating: |  Information verified through data from accident investigation authorities |
On 12 March 2021, during the demonstration of an engine failure after takeoff emergency procedure, the commander of a MBB-BK 117 helicopter reduced one of the engine’s throttle to idle. When the throttle setting was later increased, the engine did not respond. Takeoff was rejected and a firm landing executed.
This serious incident occurred during the demonstration of an engine failure after takeoff emergency procedure on a revalidation flight for the commander’s type rating instructor qualification.
The engine failure was simulated by the commander reducing Engine No 1’s throttle to idle. Shortly afterwards the commander increased the throttle setting, but Engine No 1 did not respond. During attempts to resolve the problem, the throttle setting for Engine No 2 was inadvertently reduced, resulting in insufficient power being available for continued safe flight. The commander rejected the takeoff and executed a firm landing within the airfield boundary.
While the aircraft’s skid assembly was deformed as a result of the landing, the touchdown forces did not exceed the manufacturer’s threshold for it to be classified as a ‘hard landing.’
The subsequent engineering investigation did not find any evidence of malfunction in the engine control systems. Engine No 1 probably did not respond because the rotor rpm droop compensation had been inadvertently trimmed in the wrong direction.
=Damage Sustained to Airframe=
Per the above AAIB Report "Distorted aft crosstube between skids"
Aircraft repaired and returned to service by May 2021.
Accident investigation:
 |
|
Sources:
1. AAIB Report: https://assets.publishing.service.gov.uk/media/61fa35048fa8f538956b5b29/MBB-BK_117_C-2_G-MPSB_03-22.pdf
2. http://www.rotorspot.nl/product/bk117.php
3. https://swwarks.weebly.com/policeairoperations.html
4. https://www.helis.com/database/cn/25409/
5. https://en.wikipedia.org/wiki/North_Weald_Airfield
Media:
During a simulated single engine emergency procedure training, a MBB-BK 117 helicopter rejected takeoff and executed a firm landing. North Weald Airfield, Essex. Read the report: https://t.co/WoKtqGSD4I pic.twitter.com/HWPqTxcJsK
— AAIB (@aaibgovuk) February 3, 2022
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Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 03-Feb-2022 18:48 | Dr. John Smith | Added |
| 03-Feb-2022 18:49 | Dr. John Smith | Updated [Embed code] |
| 05-Feb-2022 14:48 | Dr. John Smith | Updated [Registration] |
| 23-Jun-2023 19:11 | harro | Updated [[Registration]] |
| 15-Mar-2024 20:37 | ASN | Updated [Accident report] |
Corrections or additions? ... Edit this accident description
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