"In June 2007 a Boeing 737-300 had an uncommanded and unrecognised autothrottle disconnect during the initial stages of an approach to Belfast Aldergrove Airport. The disconnect occurred with the thrust levers at idle and the aircraft decelerated below its commanded speed of 170 kt. At 112 kt with a 16° nose-up attitude the crew advanced the engines to 96% N1 and a rapid change of pitch to 22° ensued. The aircraft lost some 300 feet before recovering to manoeuvre speed and level flight."
Thomson Fly Pilot notes:
"The operator’s QRH procedure for upset recovery is set out in Appendix B3. The ‘upset recovery’ QRH defines an upset as unintentionally exceeding a pitch angle greater than 25º nose-up. The procedure states:
‘If needed, use pitch trim sparingly.’
The procedure continues:
‘These techniques assume that the aircraft is not stalled. A stall condition can exist at any attitude and may be recognised by continuous stick-shaker activation accompanied by one or more of the following:
Buffeting which could be heavy at times●●
Lack of pitch authority and/or roll control●●
Inability to arrest descent rate●●
If the airplane is stalled, recovery from the stall must be accomplished first by applying and maintaining nose down elevator until stall recovery is complete and stick-shaker activation ceases.’
The upset recovery procedure requires the pilot flying to carry out certain actions including:
25
Apply as much as full nose-down elevator●●
Apply appropriate nose down stabilizer trim●●
Reduce thrust’●●"
MORE DETAIL HERE:
http://www.aaib.gov.uk/cms_resources...%20G-THOF1.pdf