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ASN Wikibase Occurrence # 194406
Last updated: 12 October 2021
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Type:Silhouette image of generic AT72 model; specific model in this crash may look slightly different
ATR 72-202
Registration: SP-LFA
MSN: 246
Fatalities:Fatalities: 0 / Occupants: 18
Other fatalities:0
Aircraft damage: Unknown
Location:EPBY -   Poland
Phase: Initial climb
Nature:Passenger - Scheduled
Departure airport:EPBY
Destination airport:EPWA
Total Loss of A/C control and orientation in clouds shortly after departure at 3000ft following both AHRS(Attitude and Headning Reference System) failure. AHRS 2 already inoperative on the ground before departure(did not recognize by the crew) and AHRS 1 switched off by First Officer who incorrectly understood Captain order to reset Autopilot, so crew has lost all flight instruments except Standby Indicators. Bank varied from 44°R to 22°L when pitch varied from -28°down to +32°up and G load varied from +0,37g to +2,61g and speed reached 253,2kt. The crew finally resumed control of A/C when exit clouds at FL 200 and landed at destination uneventfully.
1.Poor CRM between CPT and FO,
2.Procedures on the ground(AHRS alignment) did not followed
3.Short rest time during night(4hr sleep only)


Final Report of State Commission on Aircraft Accidents Investigation (SCAAI)
Visualization of the accident prepared by Polish SCAAI


Photo of SP-LFA courtesy

Frankfurt am Main (EDDF / FRA / FRF)
11 August 2012; (c) Günter Schütze

Revision history:

26-Mar-2017 11:10 Slawek Added
26-Mar-2017 14:51 Slawek Updated [Source]

Corrections or additions? ... Edit this accident description