Narrative:

After passing glovr and while on the outbound holding leg, the LNAV was engaged and aircraft turned into a 30 degree angle of bank to get on the inbound leg. Suddenly, the autoplt disengaged, the nose dropped and aircraft lost 800 ft in seconds. I disengaged the autothrottle climbed up to 41000 ft and resumed holding.

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Original NASA ASRS Text

Title: A B737, LOST 800 FT IN THE HOLDING PATTERN AT FL410 WHEN THE CAPT SELECTED LNAV FOR THE TURN BACK INBOUND TO THE VOR. THE AUTOPLT HAD DISENGAGED DURING THE ENSUING 30 DEG BANK.

Narrative: AFTER PASSING GLOVR AND WHILE ON THE OUTBOUND HOLDING LEG, THE LNAV WAS ENGAGED AND ACFT TURNED INTO A 30 DEG ANGLE OF BANK TO GET ON THE INBOUND LEG. SUDDENLY, THE AUTOPLT DISENGAGED, THE NOSE DROPPED AND ACFT LOST 800 FT IN SECONDS. I DISENGAGED THE AUTOTHROTTLE CLBED UP TO 41000 FT AND RESUMED HOLDING.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.