UT Air 737-500 VQ-BJP Loss of control on approach
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On 13 Oct 2017 at 06:17Z, 737-500, VQ-BJP (28905/2934), operated by UT Air was approximately 5nm on an ILS approach for runway 06 at Moscow Vnukovo in poor visibility when it suffered a loss of control. The crew recovered and the aircraft landed successfully from its next approach 18 minutes later.
Data from this event has leaked out and an excerpt of the FDR plot is shown below. It appears to show the aircraft descending to 1300ft at 133kts, then climbing. During the climb the pitch increases slowly to 19deg then the autopilot is disengaged and the pitch is reduced to 10.5deg before increasing sharply to 42.5deg. The speed has reduced during the climb to 90kts and the aircraft drops a wing to the left by 33deg, then reverses its roll to 35deg right, then 96deg left then 48deg right before stabilising. The CAS reduced to a minimum of 65Kts with a minimum altitude of 1142ft – a height loss of approximately 1200ft from the peak.
Since the engine parameters and stab trim data have not been released, it is not clear how the aircraft was trimmed during the go-around. Given that there have been other 737 loss of control events during go-arounds, attention is bound to be focussed here.
Other airline forums have mentioned the following possible contributory factors:
- CATII could not be performed as the FO was very new.
- The Captain was busy with the change of RWY.
- PF set IAS 110 instead of HDG 110.
Of course none of the above can be confirmed until release of official reports from the MAK. The MAK have released the following statement.
UUWW 130600Z 17003MPS 2100 R24/1600U BR OVC001 09/08 Q1002 R24/290050 TEMPO 0400 FG RMK QBB050=
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*** Updated 23 Nov 2020 ***
