Originally Posted by Litebulbs
Does such a thing as an Operations Manual Engineering exist?
No. All steps are described in the AMM (Aircraft Maintenance Manual).
IIRC the maintenance did a leak check on one of the aft doors.
Every switching is mentioned in the AMM.
Here you see a quote out of the actual "Cabin Pressure Leak Test" Task:
05-51-91-702-001
...
D. Prepare for the Cabin Pressure Leakage Test
...
(9) (a) Move the pressurization mode selector on the forward overhead panel to MAN.
...
...
F. Put the Airplane Back to its Usual Condition
(1) Do a check of the Pitot Static system for leaks and correct operation if it is necessary
(2) Open the equipment cooling flow control valve.
(3) If the equipment cooling fans were selected from NORMAL to ALTERNATE, the switches must be returned to the NORMAL position.
(4) Move the pressurization mode selector on the forward overhead panel to AUTO.
But the point F(4) did not exist in the AMM revision valid at august 2005.
This sentence appears in the revision januar 2006. 