ASN Wikibase Occurrence # 147105
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| Date: | Sunday 11 August 1991 |
| Time: | 14:45 UTC |
| Type: |  British Aerospace ATP |
| Owner/operator: | British Midland Airways - BMA |
| Registration: | G-BMYK |
| MSN: | 2003 |
| Year of manufacture: | 1987 |
| Fatalities: | Fatalities: 0 / Occupants: 63 |
| Aircraft damage: | None |
| Category: | Incident |
| Location: | 10 miles N of Cowley, Oxfordshire -
 United Kingdom
|
| Phase: | En route |
| Nature: | Passenger - Scheduled |
| Departure airport: | East Midlands Airport (EMA/EGMX) |
| Jersey-States Airport, Channel Islands (JER) | |
| Investigating agency: | AAIB |
| Confidence Rating: |  Accident investigation report completed and information captured |
During the climb to FL160, the aircraft suffered a significant degradation of performance and propeller icing, accompanied by severe vibration that rendered the electronic flight instruments partially unreadable. The aircraft stalled and this was followed by a severe uncontrollable roll oscillation and the development of a high rate of descent during which the de-icing boots were operated. Control was regained 3,500 feet lower when the aircraft had descended below cloud. The flight continued uneventfully.
CAUSES: "The following causal factors were identified: (1) The rapid accumulation of glaze ice, which was not evident to the crew, but which produced significant aerodynamic degradation.; (2) The difficulty of assessing visually the thickness of ice on the wing leading edges from the flight deck.; (3) The BMA standard procedure to use a maximum ITT of 720°C in the climb discouraged the commander from applying power to counteract the loss of performance.; (4) Use of the autopilot in the pitch mode during the climb which hampered recovery from the subsequent loss of control.; (5) The propeller vibration which disguised the onset of the stall."
Accident investigation:
 |
|
Sources:
1. AAIB: https://assets.digital.cabinet-office.gov.uk/media/5422f3d5e5274a1314000491/Summary_AAR_4-1992__British_Aerospace_ATP__G-BMYK_11-92.pdf
History of this aircraft
Other occurrences involving this aircraft
| 15 January 1993 | G-BMYK | Manx Airlines operated by British Midland | 0 | East Midlands Airport (EMA/EGNX) | |
sub |
| Collision with Ground support equipment | ||||||
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 26-Jul-2012 07:20 | harro | Added |
| 10-Oct-2012 12:06 | Dr. John Smith | Updated [Location, Source, Embed code, Narrative] |
| 10-May-2014 20:13 | TB | Updated [Location, Source, Embed code] |
| 07-Apr-2016 22:37 | Dr.John Smith | Updated [Location, Source] |
Corrections or additions? ... Edit this accident description
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